Index Automatic Control Valves TM R CONTENT PAGE Main Valve Hytrol 1 Main Valve Schematic Diagram 2 Quick Selection / Performance Chart 3 Hytrol Part Listing 4 Hytrol Dimensions New Globe Execution (NGE) 5 Hytrol Dimensions New Globe Execution (GE) 6 Main Valve Tytan 7 Cavitation Guide 8 Quick Valve Selection / Flow Chart 9 CLA-VAL SERIES 40-01/640-01 Rate of Flow Control Valve 10 CLA-VAL SERIES 50-01/650-01 Pressure Relief , Pressure Sustaining Valve 11 CLA-VAL SERIES 60-32/660-32 Pump Control & Back Pressure Valve 12 CLA-VAL SERIES 90-01/690-01 Pressure Reducing Valve 13 CLA-VAL SERIES 124-01/624-01 On/Off Float Control Valve 14 CLA-VAL SERIES 129-01/629-01 Modulating Float Control Valve 15 CLA-VAL SERIES 136-01/636-01 On/Off Electrical Remote Control Valve 16 CLA-VAL SERIES 210-01/610-01 On/Off Altitude Level Control Valve 17 CLA-VAL 100-01 KO Anti Cavitation Hytrol Valve 18 Cla-Val SERIES ECO 90-35 Dual Stage Pressure Reducing Valve 19 CLA-VAL SERIES 98-04 Dual Stage Pressure Management Control Valve 20 CLA-VAL SERIES PCM 90-01 Pressure Reducing Valve 21 CLA-VAL 100-42 Roll Seal 22 H-Strainer 23 Typical Waterworks Network 24 Why Specify CLA-VAL Automatic Control Valves 25
26
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R Automatic Control Valves - MSV · Cla-Val SERIES ECO 90-35 Dual Stage Pressure Reducing Valve 19 CLA-VAL SERIES 98-04 Dual Stage Pressure Management Control Valve 20 CLA-VAL SERIES
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Index
Automatic Control ValvesTM
R
CONTENT PAGE
Main Valve Hytrol 1
Main Valve Schematic Diagram 2
Quick Selection / Performance Chart 3
Hytrol Part Listing 4
Hytrol Dimensions New Globe Execution (NGE) 5
Hytrol Dimensions New Globe Execution (GE) 6
Main Valve Tytan 7
Cavitation Guide 8
Quick Valve Selection / Flow Chart 9
CLA-VAL SERIES 40-01/640-01 Rate of Flow Control Valve 10
CLA-VAL SERIES 50-01/650-01 Pressure Relief , Pressure Sustaining Valve 11
CLA-VAL SERIES 60-32/660-32 Pump Control & Back Pressure Valve 12
CLA-VAL SERIES 90-01/690-01 Pressure Reducing Valve 13
CLA-VAL SERIES 124-01/624-01 On/Off Float Control Valve 14
CLA-VAL SERIES 129-01/629-01 Modulating Float Control Valve 15
CLA-VAL SERIES 136-01/636-01 On/Off Electrical Remote Control Valve 16
CLA-VAL SERIES 210-01/610-01 On/Off Altitude Level Control Valve 17
CLA-VAL 100-01 KO Anti Cavitation Hytrol Valve 18
Cla-Val SERIES ECO 90-35 Dual Stage Pressure Reducing Valve 19
CLA-VAL SERIES 98-04 Dual Stage Pressure Management Control Valve 20
CLA-VAL SERIES PCM 90-01 Pressure Reducing Valve 21
CLA-VAL 100-42 Roll Seal 22
H-Strainer 23
Typical Waterworks Network 24
Why Specify CLA-VAL Automatic Control Valves 25
Valve Fully Open
When pressure in the cover
chamber is relieved to a lower
pressure or to the atmosphere, the
inlet pressure opens the valve.
Valve Closure
When inlet pressure is applied to
the cover chamber, the valve
closes drip-tight.
Valve Closure
A Cla -Val “modulating” pilot
control is fitted to automatically
compensate for line pressure
changes.
Main Function
CLA-VAL Model 100-01
There are three HYTROL types:
The Hytrol Valve is a hydraulically operated, diaphragm actuated, single chambered globe or angle
pattern valve.
It consists of three major components, namely: the body, cover and diaphragm assembly. The diaphragm assembly is the only
moving part, and forms a sealed chamber in the upper portion of the valve, separating operating pressure from line pressure.
The synthetic rubber sealing disc, with rectangular cross section,
is supported on three and a half sides by a disc guide and a disc
retainer, and forms a drip tight seal.
The Model 100-01 is the basic valve used in nearly all
CLA-VAL Automatic Control Valves.
Globe Execution 100-01
New Globe Execution 100-20
Angle Pattern 100A-01 or 100A-20
�
�
�
1
Principle of Operation
CLA-VAL 100-01
Main Valve HYTROL
Simple, Reliable and AccurateSimple, Reliable and Accurate
On/Off Control On/Off Control
ModulatingControl
Diaphragmassembly
BodySeat Stem
Diaphragm
Cover
Disc retainer& rubber disc
NEW GLOBE EXECUTION
Main Valve: Model 100-20
Available sizes
Cavitation resistant
Normal CV flows
Fast seat lift at low flow
DN80 - DN200 (SA Manufactured)
DN250 - DN1200 (Ex Import)
GLOBE EXECUTION
Main Valve: Model 100-01
Available sizes
High flow valve
High Cv flows
Normal seat lift at low flow
DN50 - DN300 (SA Manufactured)
DN350 - DN600 (Ex Import)
ANGLE PATTERN
Main Valve: Model 100A-01
Available sizes
High flow valve
High Cv flows
DN32 - DN400 (Ex Import)
2
CLA-VAL HYTROL VALVE
Main Valve Schematic Diagram
Large size
cavitation breaker
Fast seat lift
at low flow
Normal size
cavitation breaker
Normal seat lift
at low flow
Normal size
cavitation breaker
Normal seat lift
at low flow
0
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 50 60 70 80 90 100
% Cv (flow coefficient)
%L
ift
(ste
mlif
t)
g
vH =
CvQ = �p
�p
�pKvQ =
2
2
H
v
g
: head loss (m)
: average pipe velocity (m/s)
: gravitational constant (9.81m/s2)
: resistance coefficient (-)
Q
Kv
Cv
: rate of flow (m3/h)
: flow coefficient (m3/h)
: flow coefficient (l/s)
: head loss (bar)
Fast Lift : 10% Cv = 25% Lift
Normal Lift : 10% Cv = 15% Lift
For an appropriate operation, valve
should be sized at 70% total Lift
New Globe
Execution (NGE)
Globe Execution (GE)
CLA-VAL 100-01
Quick Selection / Performance Chart
3
Materials, Sizes and TempraturesMaterials, Sizes and Tempratures
PN16 / PN25 / PN40
Body & CoverDuctile Iron SABS 936 Grade 42
(BS 1563 Grade 420/12)
Disc Retainer &
Diaphragm Washer
Ductile Iron SABS 936 Grade 42
(BS 1563 Grade 420/12)
Disc Guide 304 Stainless Steel
Stem 316 Stainless Steel
Stem Nut 303 Stainless Steel
Spring 302 Stainless Steel
Sealing Disc Nitrile Rubber (Buna-N)
DiaphragmNitrile Rubber (Buna-N)
Nylon Reinforced
Cover Bearing Gunmetal BS 1400 LG 2
Seat Stainless Steel ASTM A743 CF-8
CoatingFusion Bonded Epoxy Coated or
Two Pack Epoxy Coated
Pattern Screwed Flanged
Globe 10mm - 80mm 40mm - 1200mm
Angle 40mm - 80mm 50mm - 600mm
Fluids
-4˚C to 80˚C
Other Materials Available on Request
� 316 Stainless Steel – 40mm to 200mm
� Cast Steel (WCB) – 50mm – 400mm
� Also available in: FM Approval and UL Listing
Nut
Washer
Cover
Cover bearing
Spring
Stem nut
Diaphragm washer
Diaphragm
Disc retainer
Space washer
Disc
Disc guide
Stem
Seat screws
Seat
Seat
Stud
O-ringSeat O-ring
Body
Body
Part Listing for NGE & GE
CLA-VAL HYTROL VALVE
4
GE : DN400NGE : DN500 - DN600
GE : DN200 - DN400NGE : DN250 - DN600
Cover
Coverbearing
assembly
L
ØF
Hm
BA
H1
H
Ø C
Approx. outer limits of pilot-system
Stem
Approximate Weight
Complete Valve : 100%
= 20%
= 20%
= 60%
Cover
Trim
Body
CLA-VAL 100-01
Dimensions New Globe Execution (NGE)
5
The Kv or Cv = m /h or l/s @ 100 kPa (1 bar) head loss with 15 C water (valve totally open)³ ˚
The Kv or Cv = m /h or l/s @ 100 kPa (1 bar) head loss with 15 C water (valve totally open)³ ˚
Rp 1 ¼”
B : PN10 - PN16BB : PN25 - PN40
FIL
TR
AT
ION
CO
NT
RO
L
Modula
ting
Flo
at
Leve
l Control
(Series
129)
Flo
wC
ontrol
(Series
40)
Check
Valv
e
(Series
81)
On/O
ffF
loatLevelC
ontr
ol(S
eries
124)
or
Modula
ting
Flo
atLevelC
ontr
ol(S
eries
129)
Pre
ssure
Sust
ain
ing
Control (
Series
50)
Surg
eC
ontrol
(Series
50)
Pre
ssure
Reduci
ng
Sta
tion
(Series
90)
Exc
ess
Flo
wC
ontrol
(Series
85)
Rem
ote
On/O
ffC
ontrol
(Series
135E
/D)
Press
ure
Red
ucin
gan
d
Press
ure
Susta
inin
g
(Ser
ies
90)
Pum
pC
ontrol
(Series
60)
Rem
ote
Ste
pby
Ste
p
Control(
Series
136)
Pre
ssure
Relie
f
(Series
50)
On/O
ffA
ltitu
de
Leve
l Control (
Series
210)
RE
SE
RV
OIR
CO
NT
RO
L(C
losed
tan
ks)
NE
TW
OR
KP
RO
TE
CT
ION
NE
TW
OR
KC
ON
TR
OL
NE
TW
OR
KC
ON
TR
OL
NE
TW
OR
KP
RO
TE
CT
ION
NE
TW
OR
KC
ON
TR
OL
RE
SE
RV
OIR
CO
NT
RO
L(O
pen
Tan
ks)
RE
MO
TE
CO
NT
RO
L
NE
TW
OR
KF
EE
DIN
G(P
um
pC
on
tro
l)
TM
R
TYPICAL WATERWORKS NETWORK
24
INTRODUCTION
THE CLA-VAL DIFFERENCE
Control valves form an essential part of the effective and efficient operation of any pipeline system. Selection of these devices is highly dependant on the personal
experience of the engineer, the detail in manufacturer’s product literature and published imperical data. It is often assumed, due to the lack of published field data that
at least, all control valves are the same in performance. Control valves for this reason, are often specified based on the desired function or, for a perceived advantage
which may in essence have no bearing on the valve’s effectiveness.
As an integral component to any pipeline system, control valves should be selected as with all other pipeline components on the cost of ownership which implies
weighing up the initial cost of the valve against; maintenance, requirements, ease of installation, effectiveness of operation, availability of spares and, technical
support and after sales backup.
Cla-Val, when assessed against these requirements and for the reasons outlined below, is the most obvious choice for all your control valves needs.
Low flow conditions cannot be accommodated for in conventional control valves without the addition of paraphernalia such as Vee Ports and the like that may present
additional operational problems. Alternatively, expensive changes to the pipeline are recommended such as installation of reducing pieces and smaller diameter
valves or, installation of low flow bypasses.
Model 600 Cla-Val Hytrols provide a cost effective and efficient reduced port design to cope with low flow conditions.
High pressure drops or excessive flow conditions will inevitably cause cavitation which result in high noise, excessive vibration and damage to the valve. Designs
utilizing Vee Ports do not prevent but aggravate this destructive phenomenon. The use of multiple orifice plates is often not practical in applications where there is
limited space; in addition, the solution is removed from the valve and can lead to error in application.
The specific design of the model 600 CLa-Val with its enlarged flow area around the seat allows for vapour bubbles to slow down before disposing against the walls of
the valve housing, reducing potential cavitation damage. A ratio of 4 to 1 reductions in pressure can be maintained without damage.
In addition, Cla-Val provides a proven, radial design cartridge that can be fitted to its standard hytrol design for severe applications.
The stem of a control valve is often subjected to high differential pressures. Stems of Wye (Y) Pattern (sometimes called semi-straight) designs are centrally guided.
The inclined operation of the stem in addition to its central guidance often leads to excessive wear of the o-ring seals and bearings and subsequent leaks. Vee Ports,
which may cause a number of operational problems, are often specified to provide more controlled guidance to the stem.
The Cla-Val non-magnetic stem as standard is fully guided through its complete stroke by two replaceable bearings.
Pilot control systems form the heart of any control valve design. Most manufactures provide a limited selection of pilot controls or, make use of three way controls
which result in inaccuracy in control due to the shifting of the control point.
The two-way modulating control systems manufactured by Cla-Val are designed to minimize set point fluctuations. Stem movement of these controls are limited to
one-mm, hence the spring is compressed by one-mm maximum, and the modulus of the spring does not change over this distance of compression, resulting in the
set point remaining constant. Cla-Val in addition provides the widest selection of control systems.
It is prudent, regardless of design, to maintain control valves regularly. Large diameter, Wye (Y) pattern valves are difficult to maintain due to the bonnet installed at an
angle.
Cla-Val utilizes a globe pattern design and has only moving part which makes for ease of maintenance
Cla-Val has been available in South Africa since 1977 and has been locally manufactured, under licence to CLa-Val Co., by Dynamic Fluid Control (Pty) Ltd since
1981.
The Local market, because of this relationship has access to more than sixty five years of global experience in real world and demanding control valve operation in
applications such as waterworks distribution systems, fire protection systems, farm irrigation, navy ship systems, ground fueling and industrial fluid handling
systems. In addition, the market is updated and kept on the edge of technological advancement in electronic and hydraulic control systems through CLa-Val’s Co’s
aggressive and continued research and development program.
Cla-Val provides highly committed customer orientated sales, services, spares and technical back up - TRY US!
Low Flow Conditions
Resistance to Cavitation Damage
High Differential Pressure Applications
Sensitive and Critical Flow and Pressure set Points