-
Your Quality
Partner
CREATING LISTENING SUPPORTING INNOVATING SECURING
S E A L I N G S Y S T E m S
FRANCEJOINTGENERALITIES
SEALING SYSTEmS
OUR HYDRAULIC APPLICATIONS
PHYSICAL CHARACTERISTICS
mECHANICAL REQUIREmENTS
mANUFACTURING SYNOPSIS
ASSEmBLY RECOmmANDATIONS
Technical manual:Hydraulics seals
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
2
Faced with tough competition among the big decision-makers of
the industrial world, FRANCE JOINT has responded with innovation,
research and development, experience in low cost manufacturing, and
a consistently high level of quality, thanks to certificates ISO
9001, ISO/TS 16949, and EN 9100.
Today, FRANCE JOINT is working in close collaboration with its
clients, meeting challenges head on with success. Automotive,
Aeronautics, mobile hydraulics, Food, and Hydraulic-Pneumatic
industries... Every solution emerges from a uniquely individual
partnership, constantly fostered and renewed. Our prime objective,
based on unrivalled quality, is to find the most suitable solutions
for ensuring that you will stand out in what has become an
extremely competitive domain.
Our position of excellence has led us since the birth of our
company to acquire the tools necessary to anticipate and prevent
risks and maximize our service; the ultimate objective being of
course to help you keep ahead of developments in this more and more
technological market.
Since 1981, FRANCE JOINT
SEALING SYSTEmS has been
designing, manufacturing
and distributing seals and
technical rubber parts for its
customers for whom quality
is a determining factor.
Your sealing partner
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
3
Ambitious with customer satisfaction a priority, FRANCE JOINT
has thus obtained the most powerful methods (PPAP, AmDEC, value
analyses, Audits, mRP, 8D analyses, PDCA, SPC, R&R ...) in
order to optimize simultaneously the capacity of machines and
processes, operational manpower performances, organizational
methods, and finally, product and financial results.
FRANCE JOINT guarantees the best technology and pursues its
daily objectives of a Zero defects production, through physico
chemical controls (rheometer, spectrometer, durometer...), through
dimensional and final aspects (unit controlling equipment, 3D
camera ...). This is because the search for competitiveness is as
important as the search for continuous improvement.
Therefore, quality for FRANCE JOINT means meeting an automoti-ve
customers request, using the best means available and making sure
that this concern for improved quality does not translate into a
generalized increase in costs. This is our aim and yours: The
quality of our products and service at a competitive cost, so that
tomorrow, FRANCE JOINT remains now and for always.... your N1
reference.
Several certificates obtained, ISO
9001, ISO/TS16949, and EN9100,
testify to the quality departments
commitment to constant progress
at every level of the company, at all
stages of the realization, particular-
ly where continual improvement is
what has made FRANCE JOINT the
name it is today.
Quality in our core concerns
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
4
FRANCE JOINTs contributors, who are as much inventors as
tech-nicians, get the best of fully automated, state-of-the-art
techno-logy that takes them from drawing-board to prototype and
finally to assembly line. From writing specifications to putting on
a major technical event through testing for validation and
compliance, FRANCE JOINT engineering works hand in hand with you to
find the best solutions guaranteeing the level of expected
performan-ce.
more than 1000 compounds integrating elastomers, PTFE materials,
Polyurethane, or even thermoplastics, as many solutions vis-a-vis
the new most complex requirements which will put you in pole
position today so that we can all be winners tomorrow.
FRANCE JOINT puts in place qualifications in order to examine
the behavior of its seals according to various parameters
intervening on frictions, pressures, temperatures, speeds, stokes,
leakages
Innovation, reliability, safety, mini-
mization of risk: your expectations
are our daily concern. To get from
the idea to the finished product
demands firm managerial control
over a wide range of projects in
addition to expertise in manufac-
turing.
The best technology for your competitiveness
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
1 - Generalities
General Description
Hydraulic mechanisms, such as hydraulic jacks, are machines that
are used in many domains (public engines, agricultural machinery,
automobile industry, building etc... Even hydraulic tools using the
latest technology cannot work properly unless they have integrated
a system of adapted sealing.
The table below illustrates the whole family of hydraulic seals
currently used by France Joint.
1 (Organigram) - Family of hydraulic seals
5
Hydraulic seals
Static Application Dynamic Application
(Jack) Rod Part Piston Part O-ring
X-ring
Flat seal
Square sectioned seal
Back up seals
Technical moulded parts
BS seal
Lip seal
Composite seal
Compact seal
Compo compact seals
Guiding seals
Lip seal
Composite seal
Compact seal
Compo compact seals
Guiding seals
Wiper seal Wiper seal
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
2 - Sealing Systems
General Description
In some activities where the standards are very high, one seal
alone cannot respond to the particular needs; that is why France
Joint proposes a complete system of seals. All of the seals
designed by France Joint for heavy applications on rods, respect
the following configuration: a buffer, a secondary seal, a guide
seal and a wiper seal.
The buffer is a seal, which sustains limited high pressure of
the highest intensity. It must present excellent characteristics
such as wear resistance and tear resistance and have the
coefficient of limited friction. moreover, the secondary seal must
support pressures of a far lower intensity and must also have good
wear resistance and tear resistance. As for the guide seal, it must
resist to losing its shape under weight and must have a good
friction coefficient.
Finally, the wiper seal must fulfil its main function, which is,
to stop the intrusion of impurities and keep the lubricating film
on the rod in contact.
For heavy piston applications, we will find a single or double
effect seal, as well as guide seals.
Handling and Lifting
2 (Scheme) - Handling and Lifting / Sealing System in rod and
piston parts
MONTAGE 2 TIGE PISTON MANUTENTION LEVAGE
BECA 006SBECA 512/513BECA 005/007BECA 006S
BECA 316BECA 005/007 BECA 239 BECA 472
MONTAGE 1 TIGE PISTON MANUTENTION LEVAGE
BECA 509 /650BECA 005/007 BECA 005/007BECA 231 BECA 470BECA
005/007
6
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Agriculture
3 (Scheme) - Agricultural / Sealing system in rod and piston
partsMONTAGE 1 TIGE PISTON VERIN AGRICOLE
BECA 005/007BECA 336BECA 231 BECA 470
MONTAGE 2 TIGE PISTON VERIN AGRICOLE
BECA 005/007BECA 336 BECA 336BECA 231 BECA 470BECA 005/007
MONTAGE 3 TIGE PISTON VERIN AGRICOLE
BECA 570/571
BECA 231 BECA 470BECA 005/007
7
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Construction machinery
4 (Sealing) - Construction machinery / Sealing system / Rod
partMONTAGE 1 TP TIGEBECA 316BECA 005/006/007 BECA 325BECA 470/471
BECA 005/006/007
MONTAGE 3 TP TIGE
BECA 316BECA 005/006/007 BECA 239BECA 473 BECA 005/006/007
MONTAGE 2 TP TIGE
BECA 005/006/007 BECA 325BECA 475 BECA 005/006/007BECA 315
8
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
5 (Diagram) - Construction machinery / Sealing System / Piston
part
MONTAGE 1 TP PISTON
BECA 006S BECA 005/007BECA 579BECA 005/007 BECA 006S
MONTAGE 3 TP PISTON
BECA 650BECA 005/007 BECA 005/007
MONTAGE 2 TP PISTON
BECA 006S BECA 005/007BECA 512/513BECA 005/007 BECA 006S
9
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Food Industry
6 (Scheme) - Food Industry / measuring pump sealing system
POMPE DOSEUSE
BECA 889
ALIMENTAIREALIMENTARY
MEASURING PUMP
+ FKM, ALIMENTARY VMQ, EPDM + FKM, ALIMENTARY VMQ, EPDM
7 (Scheme) - Food Industry / Specific PTFE sealing systemBECA
006 PTFE
BECA 006 PTFE
BECA 509 PTFE
BECA 159 PTFE BECA 482 PTFE
EXEMPLE
+ VITON OU SLICONE ALIMENTAIRE
+ VITON OU SLICONE ALIMENTAIRE
ETANCHEITE ALIMENTAIRE
+ VITON OU SLICONE ALIMENTAIRE
EPDM
EPDM EPDM
+ FKM, ALIMENTARY VMQ, EPDM + FKM, ALIMENTARY VMQ, EPDM
1 0
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
General mechanics
8 (Scheme) - General mechanics / Sealing System
2 PORTEURS EN RESINE PHENOLIQUE
2 JOINTS COMPOSITES SE RACLEUR 2 LEVRESPTFE
JOINT COMPOSITE DOUBLE EFFET
VERIN DE STABILISATION
4 PORTEURS EN RESINE PHENOLIQUE
2 JOINTS COMPOSITES SE RACLEUR 2 LEVRESPTFE
JOINT COMPOSITE DOUBLE EFFET
AVEC BAGUES DE GUIDAGE EN L
VERIN DE LAMINOIR
PORTEURS PTFE CHARGES
JOINT COMPOSITE SE RACLEUR 2 LEVRESJOINT COMPOSITE DOUBLE
EFFETPTFE CHARGE
PORTEURS PTFE CHARGES
DOUBLE EFFECT COMPOSITE SEAL 2 SE COMPOSITE SEALSPTFE WIPER
SEAL
4 GUIDING ELEMENTS IN PHENOLICS
DOUBLE EFFECT COMPOSITE SEAL
WITH GUIDING ELEMENTS IN L
2 SE COMPOSITE SEALSPTFE WIPER SEAL
2 GUIDING ELEMENTS IN PHENOLICS
PTFE WIPER SEALSE COMPOSITE SEALDOUBLE EFFECT COMPOSITE SEAL
GUIDING ELEMENTS IN PTFE LOADED GUIDING ELEMENTS IN PTFE
LOADED
1 1
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
9 (Scheme) - General mechanics / Sealing System
JOINT COMPOSITE DOUBLE EFFET
VERIN DE PRESSE A DECOUPE RAPIDE
RACLEUR DOUBLE LEVRES PU
JOINT COMPOSITE SIMPLE EFFET
PORTEUR PTFE CHARGE
PORTEUR PTFE CHARGE
PORTEUR PTFE CHARGE
PORTEUR PTFE CHARGE
JOINT COMPOSITE SIMPLE EFFET
VERIN DE PRESSE
CALES DE REGLAGE
MATRICER
GUIDING ELEMENTS IN PTFE LOADED
GUIDING ELEMENTS IN PTFE LOADED
GUIDING ELEMENTS IN PTFE LOADED
GUIDING ELEMENTS IN PTFE LOADED
DOUBLE EFFECT COMPOSITE SEAL
SIMPLE EFFECT COMPOSITE SEAL
SIMPLE EFFECT COMPOSITE SEAL
2 LIPS WIPER SEAL IN PU
ADJUSTING WEDGE
1 2
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
3 - Our Hydraulic Applications
Our Rod Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 002 NBR - PTFE 500 - 40C +250C 1
BECA 021 NBR - ACETALFKm - PTFE 400- 30C + 120C- 30C + 225C
2
BECA 022 NBR - ACETALFKm - PTFE 400- 30C + 120C- 30C +225C 2
BECA 150BECA 152BECA 154
PTFE - NBRPTFE - FKm 500
- 30C + 120C- 30C + 225C 5
BECA 151BECA 153BECA 155
PTFE - NBRPTFE - FKm 500
- 30C + 120C- 30C + 225C 5
BECA 157BECA 158
PTFE - NBRPTFE - FKm 500
- 30C + 120C- 30C + 225C 5
BECA 170BECA 179
PTFE - NBRPTFE - FKm 500
- 30C + 120C- 30C + 225C 5
BECA 190 NBR - ACETAL 500 - 30C + 120C 0.5
1 3
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Our Rod Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 200BECA 201 NBR - ACETAL 700 - 30C + 120C 0.5
BECA 230 NBRFKm 250- 30C + 120C- 30C + 225C 0.5
BECA 231 POLYURETHANE 400 - 30C + 90C 0.5
BECA 235 NBRFKm 250- 30C - 120C- 30C - 225C 0.5
BECA 239 NBRFKm 350- 30C - 120C- 30C - 225C 0.5
BECA 300 NBR - ACETALFKm - PTFE 275 - 30C + 120C 0.5
BECA 301 NBR - ACETALFKm 350 - 30C + 120C 0.5
BECA 301 - Back up ring
NBR - ACETALFKm 350 - 30C + 120C 0.5
BECA 310 POLYURETHANE 400 - 30C + 90C 0.5
1 4
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Our Rod Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 312 POLYURETHANEACETAL 500 - 30C + 90C 0.5
BECA 315 POLYURETHANEACETAL 500 - 30C + 90C 0.5
BECA 316 POLYURETHANEACETAL 500 - 30C + 90C 0.5
BECA 320 POLYURETHANENBR 400 - 30C + 90C 0.5
BECA 322 POLYURETHANENBR - ACETAL 500 - 30C + 90C 0.5
BECA 325 POLYURETHANEACETAL 500 - 30C + 90C 0.5
BECA 335 POLYURETHANE 400 - 30C + 90C 0.5
BECA 340 PTFE - Stainless steel spring 300 - 150C + 225C 2
BECA 349
PTFE - Stainless steel springSilicon over moulding
300 - 150C + 225C 2
1 5
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Our Wiper Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 417 NBRFKm WITHOUT- 30C + 120C- 30C + 225C 2
BECA 460 NBRFKm WITHOUT- 30C + 120C- 30C + 225C 2
BECA 461 POLYURETHANE WITHOUT - 30C + 90C 2
Our Rod Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 340 Complementary
PTFE - Stainless steel spring 300 - 150C + 225C 2
BECA 349Complementary
PTFE - Stainless steel springSilicon over moulding
300 - 150C + 225C 2
BECA 385 NBRFKm 80 - 30C + 120C 0.5
BECA 640Profil A PA 6.6 - NBR 500 - 30C + 120C 1
BECA 640 Profil B PA 6.6 - NBR 500 - 30C + 120C 1
1 6
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Our Wiper Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 464 POLYURETHANE WITHOUT - 30C + 90C 2
BECA 465BECA 466
POLYURETHANEFKm WITHOUT
- 30C + 90C- 30C + 225C 2
BECA 467 POLYURETHANE WITHOUT - 30C + 90C 2
BECA 468 POLYURETHANE WITHOUT - 30C + 90C 2
BECA 470BECA 471
NBR - STEELFKm - STEEL WITHOUT
- 30C + 120C- 30C - 225C 2
BECA 472 NBR - STEEL WITHOUT - 30C + 120C 2
BECA 473 POLYURETHANE WITHOUT - 30C + 90C 2
BECA 475 POLYURETHANEACIER WITHOUT - 30C + 90C 2
BECA 480 PTFE + NBRPTFE + FKm WITHOUT- 30C + 120C- 30C + 225C
2
1 7
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Our Wiper Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 481 PTFE + NBRPTFE + FKm WITHOUT- 30C + 120C- 30C + 225C
2
BECA 482BECA 485
PTFE + NBRPTFE + FKm WITHOUT
- 30C + 120C- 30C + 225C 2
Our Piston Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 020 NBR - ACETALFKm - PTFE 400- 30C + 120C- 30C + 225C
1
BECA 024 NBR - ACETALFKm - PTFE 400- 30C + 120C- 30C + 225C
1
BECA 235 NBRFKm 250- 30C + 120C- 30C + 225C 1
BECA 335 POLYURETHANE 400 - 30C + 90C 0.5
BECA 336 POLYURETHANE 400 - 30C + 90C 0.5
BECA 337 PTFE + Stainless steel spring 300 - 150C + 225C 2
1 8
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Our Piston Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 337Complementary
PTFE + Stainless steel spring 300 - 150C + 225C 2
BECA 337Complementary
PTFE + Stainless steel springSilicon over moulding
300 - 150C + 225C 2
BECA 338 PTFE + Stainless steel spring 300 - 150C + 225C 2
BECA 339Food
PTFE + Stainless steel springSilicon over moulding
300 - 150C + 225C 2
BECA 500BECA 502BECA 504
PTFE + NBRPTFE + FKm 500
- 30C + 120C- 30C + 225C 5
BECA 501BECA 503BECA 505
PTFE + NBRPTFE + FKm 500
- 30C + 120C- 30C + 225C 5
BECA 507BECA 508
PTFE + NBRPTFE + FKm 500
- 30C + 120C- 30C + 225C 5
BECA 510 POLYURETHANENBR - ACETAL 500 - 30C + 90C 0.5
BECA 512BECA 513
POLYURETHANENBR - ACETAL 500 - 30C + 90C 0.5
1 9
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Our Piston Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 520BECA 525
POLYURETHANEPOLYESTER
NBR350 - 40C + 100C 1
BECA 530BECA 535
POLYESTERNBR 350 - 40C + 100C 1
BECA 540 PTFE + Stainless steel spring 300 - 150C + 225C 2
BECA 540Food
PTFE + Stainless spring
Silicon over moulding
300 - 150C + 225C 2
BECA 540Complementary
PTFE + Stainless steel spring 300 - 150C + 225C 2
BECA 549Complementary
Food
PTFE + Stainless steel spring Silicon over moulding
300 - 150C + 225C 2
BECA 550BECA559
PTFE + NBRPTFE + FKm 500
- 30C + 120C- 30C + 225C 5
BECA 560 NBR - ACETAL 750 - 30C + 100C 0.5
BECA 570 NBR - ACETAL 500 - 30C + 120C 0.5
2 0
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Our Piston Seals
REFERENCE PROFILS mATERIALS mAXI PRESSURE (BAR)TEmPERATURE
(C)SPEED (m/sec)
BECA 571 NBR - ACETALFKm - ACETAL 400 - 30C + 120C 0.5
BECA 572 Profil A
POLYURETHANENBR - ACETAL 400 - 30C + 90C 0.5
BECA 579 POLYURETHANENBR - ACETAL 400 - 30C + 90C 0.5
BECA 580BECA 581
NBRFKm 80 - 30C + 120C 0.75
BECA 650 PA 6.6 - NBR 500 - 30C + 120C 1
BECA 655 PA 6.6 - NBR 500 - 30C + 120C 1
2 1
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Our Guiding Elements
BECA 005 Guiding element machined or stripped according to our
standards or your housing dimensions (material: cotton weave +
phenol resin.Guiding element machined according to your housing
dimensions: PTFE loaded or unloaded (Carbon/Graphite, Bronze,
Glass, Ekonol, etc.)
BECA 006Guiding element delivered in strip, or machined,
according to your dimensions (PTFE 55%BRONZE 5%mOS2).
BECA 007Guiding element loaded or unloaded in acetyl resin
(injected or machined).
10 (scheme) - Guiding Element in its Groove
2 2
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
4 - Physical Characteristics
Friction ratio / Lubricating film
When a hydraulic set is in motion, we can notice different
phases of friction while the lubricating film is forming. The
thickness of the film, situated between the seal and the sliding
side in contact, influences enormously the nature of the friction.
Several phases of friction appear as the hydraulic system gains
speed.
A first friction having a very strong force, called the adhesive
friction (dry friction between the seal and the mechanical part in
contact) takes shape at the beginning of the system. When the
system accelerates, a lubricating film gradually forms between the
seal and the mechanical part in contact, which reduces the friction
effect considerably. It is the mixed friction (friction between the
seal and the mechanical lubricated part). Finally, the speed
continues to accelerate and the friction increases to become
viscous (friction between two bodies with hydrodynamic
lubrication). The different phases, mentioned previously remain
similar for all functions, but to varying degrees for each material
used. The diagram below indicates that for a low pressure and
speed, it is advisable to opt for PTFE as this reaches the viscous
stage more quickly (PE heavy weight molecular is also popular).
11 (Scheme) - Friction / StribeckFrottement : Diagramme de
Stribeck
Vitesse en mm/s
Frottement Frottement Frottement d' adhrence mixte visqueux
A= Elastomre
B= PTFE
Elastomre Elastomre Elastomre
Mtal Mtal Mtal
A
B
Co
effic
ien
t d
e fr
ott
emen
t
ou PTFE ou PTFE ou PTFE
Static friction Mixed friction
Speed (mm/sec)
Coeffi
cien
t of f
rict
ion
Elastomeror PTFE
Elastomeror PTFE
Viscous friction
Elastomeror PTFE
A=ElastomerB=PTFE
2 3
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
This table indicates in a general manner, the various
coefficients of friction for each of these materials.
12 (Scheme) - Friction coefficients per materialmaterial At the
start (dry) Amid operation (lubricated)
NBR 0.9 0.4AU / EU 0.4 0.2
FKm 0.5 0.25PTFE 0.12 0.05
Pressure
Hydraulic pressure depends on the effort required for the system
to work properly. Pressure varies from one sector of activity to
another one (special machines: between 8 and 16 mPa, handling and
lifting machines: 16 to 25 mPa, hydraulic presses: 16 to 28 mPa,
Heavy machinery: 28 to 40 mPa).
Pressure is an important factor, in so far as it permits us to
choose the hardness of the seal as well as its shape so that it
does the job efficiently. In some sectors of activity, such as the
automobile industry, episodic variations in high pressure (more
than nominal pressure), can appear (mechanical impact, blow to the
ram ) France Joint integrates all these external elements, in order
to propose an effective sealing system.
moreover, when there is very little give in terms of the guiding
seal in a hydraulic jack, for example, hydrodynamic pressure, still
called towing pressure, can be caused. With reduced give between
the guiding seal and the rod seal, and at constant speed, extra
pressure (sometimes reaching tens of mPa) can happen at the front
of the seal causing it to deteriorate.
13 (Scheme) - Friction / Stribeck
2 4
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
This pressure increasing can be expressed with the following
formula :
P = (6 x N x S x L) / (Hs) P is for pressure N is the dynamic
viscosity of the fluid S is for speed L is for the length of the
guiding seal Hs is for the give or leverage
14 (Scheme) - Hydrodynamic towing pressure
V
L
P1
P1
P
PH
PD
PRESSION DE REMORQUE HYDRODYNAMIQUE
PH= P1-P= 6.N.V.L
F/22
N
P
Hs
Zone de PD
2 5
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
It is possible to avoid the formation of such towing pressure.
Helicoid grooves with a section bigger than the seal, so as to
prevent premature deterioration of the seal and some mechanical
parts. When using France Joint guide seals, (BECA 005, BECA 006,
BECA 007),an opening is already made, thus avoiding any other
hydraulic loosening grooves.
15 (Scheme) - metal guiding seal with helicoid grooves
Guidage mtallique avec rainures hlicoidales16 (Scheme) -
Synthesised resin guiding seals + throttle with clearance
Guidage en rsine de synthse+coupe sifflet avec jeu2 6
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
The choice of the material as well as the hardness of France
Joint seals is determined by the temperature of all of the
applications (temperature of hydraulic fluid, and the temperature
of its environment). For a good performance, the ideal temperature
is around +30C +60C.
The sealing lip on the friction seals with the mechanical parts
can withstand a higher temperature. The usual tem-perature when
using hydraulic fluid reaches + 80C with a peak of +100C.
The material of the seal tends to harden when the application
required, necessitates very low or even negative tem-peratures,
which results in a loss of elasticity and resilience. However, the
viscosity of the fluid will increase but will not effect its
overall functioning. On the other hand when the temperature is high
the material of the seal gains in elasticity as well as the
viscosity of the fluid. For temperatures above + 100C, France Joint
uses specific materials, such as FKm, or PTFE, or others.
Temperature
In order for the lubricating film to form, speed plays an
important role. It varies between 0,5 m/s and 5 m/s for an ideal
functioning.
For particularly weak intensity uses, speed can be limited up to
0,05 m/s increasing the friction considerably and lim-iting at the
same time the formation of the lubricating film. Such a low speed
can cause a phenomenon of juddering or jerky movements, due to a
succession of alternate slipping and sticking phases. Its whats
known as the Stick Slip effect. France Joint proposes some
innovating solutions to limit or indeed avoid the Stick Slip
effect, such as PTFE or even more recently, heavy molecular weight,
depending on the geometry of very particular seal.
For intense uses, requiring a high and ill adapted speed, leaks
can appear if the design does not take these elements into
consideration.
Speed
Fluid
Introduction to oils
Fluid holds a very important place in hydraulics.
It favours:- the transmission of power to different organs of
work (transmission of energy in the form of pressure )- the
lubrication of mechanical parts to limit wear and tear of parts in
motion- the protection of the entire hydraulic circuit - the
evacuation of heat
The fluid most regularly used is mineral oil. Water would be the
ideal hydraulic fluid (low compressibility, not inflam-mable, low
cost price) if it didnt pose serious drawbacks (corrosion, lack of
lubrication.) for the machines.
There are many fluids used that respond to precise
requirements.
We can find :- mineral oils- Synthetic oils- Oils which do, not
burn easily (aqueous solutions, synthetic solutions, non aqueous,
oil emulsions in water)
2 7
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
In the automobile industry, added mineral oils will be more
often used than certain oils of synthesis, (break fluid, automatic
gear box fluid, suspension fluid, steering systems, and hydraulic
transmissions. In the industrial sector, we can find pure or added
fluids in multiple systems (hydrostatic levers, hydrostatic
transmissions, machine controls, gate controls..)
Classification of oils
The standard ISO 6743 4 was introduced to facilitate referencing
mineral oils, those difficult to burn, and biodegrad-able oils.
mineral oils
Label Property Application
HH mineral oil without additives This oil does not transmit
energy and is rarely used today.
HL Oil + additives, with anti rust and anti corrosive
properties, for anti aging.This oil is used for low intensity uses
and be-haves well with water.
Hm Oil + additives with anti wear and tear proper-ties to cope
with wear and heavy loads. This oil is used for high pressure.
HLPD The same characteristics as Hm with detergent additives on
top.This oil is used for high pressure and water admissions.
HR Better viscosity and temperature behaviour than HL.This oil
is used in the case of frequent variations in temperature.
HV Better viscosity and temperature behaviour than Hm.This oil
is used in the case of frequent variations in temperature and low
temperature.
HS Synthetic oil with no particular fire proof prop-erty.
Special properties.
HG Additives for improving Hm anti stick propertiesThis oil is
used for machines with a lubrication circuit common to hydraulic
parts, sliding de-vices, and articulations
HD Additives for anti rust, anti wear and tear, deter-gent This
oil is used in mobile hydraulic systems and engines.
2 8
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Oils that do not burn easily
Label Temperature Property ApplicationAqueous Fluids
HFAE
+ 5C + 60C
Oil emulsion in water with more than 80% water (95-98% in
general) These oils are used in hydraulic
presses and in circuits, where leaks are frequent.
HFASAqueous chemical solution with more than 80% water (95-98%
in general)
HFB Water emulsion in oil (~40% water and 60% oil)Today, apart
from the UK, this oil is rarely used.
HFC - 30 +60C
Aqueous polymeric solution (polyethylene glycol or
poly-propylene glycol )with less than 80% water (~35 to 55% most
widely used
This oil is used in industry with a maximum temperature of 60%
and average intensity used.
Anhydrous Fluids
HFDR
-30C + 150C
Synthetic fluid with phosphor-ic esters, and no water.
This oil is used for high intensity uses and high
temperatures
HFDU Synthetic fluid with specific composition.
HFDS Synthetic fluid with chlorine hydrocarbon, and no
water.HFDT mixture of HFDR and HFDS
Biodegradable oils
Label Property ApplicationHETG Vegetable oil This oil is used in
agriculture and forestsHEPG Polyglycol This oil is used in water
protection
HEEG Synthetic ester This oil is mainly used in building
machinery.
Behaviors of oils with elastomer
mineral oils:In a hydraulic system, the choice of a mineral oil
is fundamental; in so far, as it must be compatible with the
elastomer it is in contact. The aniline point, permitting to
measure the approximate compatibility, is the temperature at which
a solution composed of aniline and oil goes cloudy when cool. If
the aniline point of fluids is low, the elastomer will tend to
swell, whereas, on contact, they will harden, contract in the case
of a high aniline point.
Tests for analysing the behaviour of oils and elastomer are
standardized, and are carried out with 3 referenced oils (ASTm oil
N1, ASTm oil N2, and ASTm oil N3) which have aniline points at
124C, 93C, et 69C respectively. It is, however, advised to analyse
their compatibility with the fluid, really used, which can be done
in a testing laboratory. When the variation of an elastomer does
not exceed +/-5% during a 70 hour test at 100C, we can consider
that the fluid and the contact material are compatible.
2 9
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Compatible Non compatibleAU
NBRFKm
FVmQPTFE
CSm (except for mineral oils not containing additives at 20)
CR (except for oils not containing additives at 20)
EPDmNRSBR
VmQ (except for ASTm N1 oils)
Oils which do not burn easily:
Oils Compatible Non compatibleHFC AU
HFDRFFKmFKmPTFE
HFDU NBRPTFE
Biodegradable oils:
Oils Temperature < 80C Temperature < 100C
HETGAU
NBRHNBR
Un-usable fluid
HEPG
AUNBR
HNBR (also with no esters)FKm (peroxyde)
HNBR (also with no esters)FKm (peroxyde)
HEEG
AUNBR
HNBRFKm (peroxyde)
AUHNBR
FKm (peroxyde)
HEPS
AUNBR
HNBRFKm (peroxyde)
AUHNBR
FKm (peroxyde)
Impurities and air in oil : cause deterioration
In order to improve the longevity of France Joint seals, and
optimize the hydraulic circuit, the cleanliness of the fluid is an
important parameter. A limited hydraulic filtration will disrupt
the mechanism because of the presence of impurities. They can
appear in the form of metal and other abrasive, chippings, silica,
outdoor dust, rust.. France Joint seals will deteriorate with such
impurities. It is therefore indispensable to carry out regular
checks and clean the filtration systems. moreover, air in the oil
can damage the seal through a micro explosion phenomenon: its the
diesel effect
Indeed, hydraulic fluid contains air particles, dissolved in oil
(in the absence of purge or introduction during the
3 0
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
working or the maintenance of the machines) which will compress
or connect, as pressure increases, and will tend to escape when the
pressure drops. These particles always sit between the seal and the
neck space and closest to any cranks formed.
For high intensity uses, such as for heavy machinery, air and
oil will reach very high temperatures. The simultaneous
compressions and loosening of air contained in the oil will heat at
their epicentre, thereby suddenly increasing the temperature, which
in turn, provokes ignition; this is the diesel effect. If such a
phenomenon is repeated regularly, it will destroy the heel of the
seal as well as mechanical and guiding parts by a blow out and
burning. It is indispensable to purge the hydraulic systems in
order to limit these micro explosions.
Viscosity
Viscosity is the capacity of hydraulic fluid to flow. It is
actually the resistance that fluid molecules encounter in order to
move by sliding by each other. Today, the term commonly used is
fluidity.
The factors, which will influence viscosity, are mainly
temperature and pressure. The standard ISO 3448 classes all
industrial oils depending on their viscosity, expressed in mm2/s at
a temperature reference of +40C. When the tem-perature increases,
viscosity tends to diminish. On the contrary, viscosity increases
as the temperature drops.
Also, increasingly high pressure will cause viscosity to
increase at a constant level. Viscosity follows a slightly
expo-nential curve depending on the pressure. We can express this
with the formula below :
V=0.003P x VO P is for pressure in mPa (1mPa=10 Bars) VO is for
viscosity at atmospheric pressure The viscose index (VI) measures
the variation of viscosity with temperature. Oils that have an
index of high viscosity will depend less on temperature.
3 1
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
5 - mechanical Requirements
Surface Roughness
The surface roughness in contact with the sliding of the seal is
an important parameter in so far as it influences the longevity and
the precision of the system. In order for the seal to do its job on
the long term, the surface roughness must be low and the guiding
elements must be in good condition.
The values used to express the condition of the surface in um
are Rt and Ra. The roughness Rmax is the most com-monly used for
the smooth working of a seal, compared to an average value of
roughness Ra. If we respect the Rmax value, the seal will not
deteriorate prematurely. The Ra value is an arithmetical value of
roughness measured on a length lm.
17 (Scheme) - Roughness RaRugosit Ra
Ray
0 x
Ra =
Lm1
Lm 0
y dx
j
j
Lm
18 (Background) - Roughness Rt and Rmax
Rugosit Rt et R max
Rt
x
RmaxLigne de saillies
Ligne des creux
Ligne moyenne
Longueur de base
Line of Projection
Average Line
Line of Hollows
Basic Lane
3 2
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
The Ra or Rt values are not enough to define the condition of
the surface with accuracy. In deed, they only permit us to measure
the typology of the surface. The percentage of aerofoil is a
determining factor when measuring a surface. The rate of aerofoil
Rmr is the relationship between the total length of the contact
surface and the total length of the ruggedness at a determinate
depth. This variable is expressed in % according to the standard
ISO EN 4287 and it must be between 50 and 80%.
19 (Background) - Rate of aerofoil RmrTaux de portance : Rmr
(mm) x100%
Dfinition : pourcentage de matire
une profondeur donne (C)
c
L1 L2 L3 L4 L5
Lm
L1+L2 +L3 +L4 +L5Rmr =Lm
Definition: percentage of matter to a given depth (C)
3 3
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
The table below represents all the general technical and
mechanical parameters intended for hydraulic sealing ap-plications.
As these vary, we recommend you contact us for all your
applications, in order to adapt the parameter to the application
and retained profile. We also advise you to consult our catalogue
(Volume l: Hydraulic seals).
20 (Table) - Rod materials CK 45 indeed if better Tolerance f8
Roughness Rmax 2,5 m ; Ra 0,05 0,3 ; Rmr 50 90%
machining
Rolling, Rectification, Anti corrosion protection (hard chromium
plating 30 50 m)Heavy loads support (quenching 55 60 HRC, hard
chro-mium plating)Finish(polishing, rectification) after obtaining
a surface in good condition.
21 (Table) - Cylinder materials St 52 indeed if better Tolerance
H8 H11,it depends on the sealing in application Roughness Rmax 2 m
; Ra 0,05 0,3 ; Rmr 50 90% machining Rolling, Running in,
22 (Table) - Groove materials Steel, Cast iron
Tolerance
Diametre of the neck bottom Rod seal H10 Piston seal h10 Piston
seal with separate tightening element h9 Guiding rod H8 Guidage de
piston h8
RoughnessRmax 6,3 mRecommendations ISO Ra 1,6 m and Rt 6,3 mA
rougher neck bottom : Rmax 10 m
machining Turning, Rectification
In order to obtain good corrosion resistance, as well as
increasing wear and tear resistances from impact, the rod must
under go chromium plating or quenching (60 HRC) and then chromium
plating. After the chromium plating, it is necessary to proceed to
the finishing step.
The process indicated like running in and rolling cylinders, as
well as rectification and inserting piston rod nuts will be
appreciated by users and are compatible with current seals.
3 4
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Housing
The housing is determined according to the type of seal
(standard or specific), the type of housing (normalized, standard
or specific) and pressure of the operation.
A seal with a thick profile will withstand high pressures better
than a seal with an inferior radial thickness. Indeed, a seal with
a small radial section undergoing pre clamping will be less
effective than a seal with a large radial section. France Joint has
the standard dimensions regularly in stock for this type of
profile, currently used in the hydraulic mobile sector, to name
one.
There are 2 types of housing (closed and open) Today; a large
number of seals are flexible, either manually or with the help of a
tool, to make insertion in closed housings easier. It is advisable
to use open housings when the diam-eter of the seal is inferior to
6 times its section or when the diameter inside the seal is
inferior to 25 mm.
23 (Background) - Type of housings
Closed neck for compact piston seal Closed neck for rod and
wiper seals
Closed neck for piston and guiding elements
Semi open neck for seals and closed neck for guiding
elements
Closed necks for guiding elements Neck that can be dismantled to
facilitate mounting seals
Gorge ferme pour compact de piston
Gorges pour porteurs et joint Gorges semi- ouvertes pour joints
et gorge pour porteur central Gorges pour joint et porteur
Logements ouverts dits "dmontables " qui peuvent tre
ventuellement rglables pour le montage de garnitures empilage
(chevrons)
Logements pour joints sur piston dmontable
Logement pour joint compact sur piston dmontableLogements pour
joints sur piston dmontable
Gorges fermes pour joint de tige et racleur Gorge ferme pour
compact de piston
Gorges pour porteurs et joint Gorges semi- ouvertes pour joints
et gorge pour porteur central Gorges pour joint et porteur
Logements ouverts dits "dmontables " qui peuvent tre
ventuellement rglables pour le montage de garnitures empilage
(chevrons)
Logements pour joints sur piston dmontable
Logement pour joint compact sur piston dmontableLogements pour
joints sur piston dmontable
Gorges fermes pour joint de tige et racleur
Gorge ferme pour compact de piston
Gorges pour porteurs et joint Gorges semi- ouvertes pour joints
et gorge pour porteur central Gorges pour joint et porteur
Logements ouverts dits "dmontables " qui peuvent tre
ventuellement rglables pour le montage de garnitures empilage
(chevrons)
Logements pour joints sur piston dmontable
Logement pour joint compact sur piston dmontableLogements pour
joints sur piston dmontable
Gorges fermes pour joint de tige et racleur Gorge ferme pour
compact de piston
Gorges pour porteurs et joint Gorges semi- ouvertes pour joints
et gorge pour porteur central Gorges pour joint et porteur
Logements ouverts dits "dmontables " qui peuvent tre
ventuellement rglables pour le montage de garnitures empilage
(chevrons)
Logements pour joints sur piston dmontable
Logement pour joint compact sur piston dmontableLogements pour
joints sur piston dmontable
Gorges fermes pour joint de tige et racleur
Gorge ferme pour compact de piston
Gorges pour porteurs et joint Gorges semi- ouvertes pour joints
et gorge pour porteur central Gorges pour joint et porteur
Logements ouverts dits "dmontables " qui peuvent tre
ventuellement rglables pour le montage de garnitures empilage
(chevrons)
Logements pour joints sur piston dmontable
Logement pour joint compact sur piston dmontableLogements pour
joints sur piston dmontable
Gorges fermes pour joint de tige et racleur
Gorge ferme pour compact de piston
Gorges pour porteurs et joint Gorges semi- ouvertes pour joints
et gorge pour porteur central Gorges pour joint et porteur
Logements ouverts dits "dmontables " qui peuvent tre
ventuellement rglables pour le montage de garnitures empilage
(chevrons)
Logements pour joints sur piston dmontable
Logement pour joint compact sur piston dmontableLogements pour
joints sur piston dmontable
Gorges fermes pour joint de tige et racleur
3 5
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
23 (Background) - Type of housings
Housing for piston seals that can be dismantled Housing for
compact piston seals that can be dismantled
Open neck for wiper seal Necks that can be dismantled to
facilitate the mounting of seals
Gorge ferme pour compact de piston
Gorges pour porteurs et joint Gorges semi- ouvertes pour joints
et gorge pour porteur central Gorges pour joint et porteur
Logements ouverts dits "dmontables " qui peuvent tre
ventuellement rglables pour le montage de garnitures empilage
(chevrons)
Logements pour joints sur piston dmontable
Logement pour joint compact sur piston dmontableLogements pour
joints sur piston dmontable
Gorges fermes pour joint de tige et racleur Gorge ferme pour
compact de piston
Gorges pour porteurs et joint Gorges semi- ouvertes pour joints
et gorge pour porteur central Gorges pour joint et porteur
Logements ouverts dits "dmontables " qui peuvent tre
ventuellement rglables pour le montage de garnitures empilage
(chevrons)
Logements pour joints sur piston dmontable
Logement pour joint compact sur piston dmontableLogements pour
joints sur piston dmontable
Gorges fermes pour joint de tige et racleur
Gorge ferme pour compact de piston
Gorges pour porteurs et joint Gorges semi- ouvertes pour joints
et gorge pour porteur central Gorges pour joint et porteur
Logements ouverts dits "dmontables " qui peuvent tre
ventuellement rglables pour le montage de garnitures empilage
(chevrons)
Logements pour joints sur piston dmontable
Logement pour joint compact sur piston dmontableLogements pour
joints sur piston dmontable
Gorges fermes pour joint de tige et racleur
Gorge ferme pour compact de piston
Gorges pour porteurs et joint Gorges semi- ouvertes pour joints
et gorge pour porteur central Gorges pour joint et porteur
Logements ouverts dits "dmontables " qui peuvent tre
ventuellement rglables pour le montage de garnitures empilage
(chevrons)
Logements pour joints sur piston dmontable
Logement pour joint compact sur piston dmontableLogements pour
joints sur piston dmontable
Gorges fermes pour joint de tige et racleur
3 6
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Extrusion Clearance
Elements permitting to determine the maximum clearance values
are pressure, seal type, and above all the material. In order to
know what the authorised clearance is for each seal, please refer
to the description of seals in our France Joint catalogues.
The calculation of authorised extrusion clearance takes the
elasticity of materials under pressure into account (elastic
deformation). Sufficient clearances in the guiding seal, so as not,
to be beyond tolerance level. If the extrusion clear-ance is too
high, we can see a rapid destruction by extrusion on the seal heel.
It is therefore advisable; beyond 250 bars, and beyond 70C, to use
back up seals (BECA 008, 011, 012 or other, in our volume lV:
Diverse seals).
24 (Scheme) - Extrusion clearance depending on the pressure of
the application
JEUX D'EXTRUSION EN FONCTION DU MATRIAU
00
10
20
30
40
50
0.5 1.0 1.5
NBR 70 Sh A
NBR 80 Sh A
NBR 90 Sh A
POLYURTHANE92 Sh A 94 Sh A
JOINT AVEC BAGUE AE
EN POLYAMIDE
JEU EN MMAU RAYON
PRESSION DE FONCTIONNEMENT
(MPa)
ET DE LA PRESSION DE FONCTIONNEMENT
20 C
PRESSURE OF OPERATION
(MPa)
SEAL WITH PA GUIDE
CLEARANCE IN MMWITH A RAY
OF 20
3 7
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
Stroke
The stroke is the length of an organ on which a sealing system
moves in a straight and alternative manner. On an ordinary
hydraulic jack, the stroke can range from 0.1m to 1m.
When a stroke is too long, we can observe a premature
deterioration of the seal due to over heating of the hydraulic
system. moreover, for such strokes, the rod on which the seal is in
contact, can meet variations in shape, linked to problems to do
with the condition of the surface, burning or other deformation
causing a possible destruction of the seal.
For extremely short strokes, rubber based seals can also
deteriorate prematurely because of the fact that the lubricat-ing
film cannot form; in which case, France Joint can propose original
and adapted solutions.
3 8
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
6 - manufacturing Synopsis
moulding of elastomer by compression
25 (Synopsis) - moulding of elastomer by compression
Reception of raw materials
Shipping
Visual and documentary control
Packaging
SPC control
Curing post
Control by three-dimensional camera (SPC)Visual dimensional
control
Finishing tasks (trimming, cutting, etc.)manual process on
digital towersAutomated process for large series, Cryogenic process
for small series
Equipment programming
Reception of semi finished products
Visual dimensional control (SPC)
Fill closing matter / Compression plates / Vulcanization /
Opening plates
Assemble tools on framework
CalenderingCutting by water cutter or extrusion sawing
Check blend
Prepare blend
Check raw materials
Reception Control ShippingPackagingPreparationmanufacturing
3 9
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
moulding of thermoplastics by injection
26 (Synopsis) - moulding of thermoplastics by injection
Reception Control ShippingPackagingPreparationmanufacturing
Reception of raw materials
Shipping
Visual and documentary control
Packaging
Control by three-dimensional camera (SPC)Visual dimensional
control
Finishing tasks (trimming, cutting, etc.)manual process on
digital towersAutomated process for large series, Cryogenic process
for small series
Equipment programming
Reception of semi finished products
Visual dimensional control (SPC)
Injection of series
Control of first partsValidation of program
Injection of first parts
Injected press programming
material and colour dosage
Check raw materials
4 0
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
machining of noble materials
27 (Synopsis) - machining of noble materials
Reception of raw materials
Shipping
Visual and documentary control
Packaging
Control by camera (SPC)Visual dimensional control
Finished operations (trimming, cutting, etc)manual process on
digital towersAutomated process large seriesCryogenic process small
parts
Equipment programing
Reception of semi finished products
Visual dimensional control (SPC)
Control of first partsValidation of program
machining of first parts
mounting of bars on bar holders
Program digital control
Control raw materials
machining of series Pull out parts with hook
Reception Control ShippingPackagingPreparationmanufacturing
4 1
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
7 - Assembly Recommandations
Generalities
We must make sure that the seals and mechanical parts are clean,
with no trace of dust, chippings or anything else, which could
present a risk compromising the effectiveness and longevity of the
seal. The degree of finish of me-chanical parts is very important
and conditions the longevity of the seal. Consequently, it is
imperative to guarantee a perfect execution. The assembly of the
seals on their necks must be done carefully, so as to avoid passing
sharp stop mechanisms, filtered parts etc.
We also recommend you lubricate or grease the seals, rods and
cylinder, in order to facilitate this operation. Before assembly,
the seal must be soaked in heated oil between 80C and 100C to
increase its elasticity.
Assembly principles
28 (Diagram) - Assembly of a polyurethane rod seal with the help
of an obturator and a rod
MONTAGE D'UN JOINT DE TIGE POLYURETHANE
29 (Diagram) - Assembly of a flexible rod seal
PRINCIPE DE DEFORMATION D'UN JOINT DE TIGE POUR MONTAGE DANS
GORGE
4 2
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
31 (Background) - mechanical unit for the assembly of composite
piston seal (cone and pusher)
30 (Scheme) - mechanical assembly unit of a composite rod seal
(cone and pusher)
ENSEMBLE MECANIQUE DE MONTAGE D'UN JOINT COMPOSITE DE TIGE -
CONE ET POUSSOIR
ENSEMBLE MECANIQUE DE MONTAGE D'UN JOINT COMPOSITE DE PISTON -
CONE ET POUSSOIR
ENSEMBLE MECANIQUE DE MONTAGE D'UN JOINT DE PISTON TYPE U - CONE
ET POUSSOIR
5 10
5 10
4 3
D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
N O V A T I N G | S C U R I N G
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
32 (Scheme) - Drill bit of composite seals after positioning in
its neck
33 (Background) - mechanical unit for the assembly of a type U
piston seal
ENSEMBLE MECANIQUE DE MONTAGE D'UN JOINT COMPOSITE DE PISTON -
CONE ET POUSSOIR
ENSEMBLE MECANIQUE DE MONTAGE D'UN JOINT DE PISTON TYPE U - CONE
ET POUSSOIR
5 10
5 10
MANDRINAGE DU JOINT COMPOSITE APRES POSITIONNEMENT DANS SA
GORGE
15
4 4
C O N T R O L I N G | A N T I C I P A T I N G | S E R V I C E |
Q U A L I T Y | P R E S T I G E
-
The pressures, speeds, temperatures, are given as information
only. For all applications, do not hesitate to consult us. The
acceptable pressures, speeds, temperatures can evolve according to
materials used.
4 5
HEAD OFFICE AND FACTORYZone Artisanale Le mortier - B.P. 50009 -
CUGAND - 85613 mONTAIGU CEDEX - FRANCE Tel. +33 (0)2 51 42 13 76 -
Fax +33 (0)2 51 43 61 14Email : [email protected] - Site Web :
www.francejoint.com
SAS CAPITAL 1.000.000 Euros - RCS 450 136 809 - N TVA FR 10 450
136 809 - SIRET 450 136 809 00016 - NAF 2219 Z
FRANCEJOINT
www.francejoint.com
FRANCE JOINT
SUPPLIES THE mOST
DEmANDING CUSTOmERS
IN THE mOST
HIGH-PERFORmING
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D E S I G N I N G | L I S T E N I N G | A S S I S T I N G | I N
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