IS 10983 (1994): Fluid power - cylinders - Housing for piston ...Cylinder rod and piston seals for reciprocating application - Dimensions and tolerances of housing: Part 1 Nominal

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IS 10983 (1994): Fluid power - cylinders - Housing forpiston and rod seals in reciprocating applications -Dimensions and tolerances - Recommendations [PGD 16: FluidPower]

IS 10983 : 1994

Indian Standard

FLUID POWER - CYLINDERS - HOUSING FOR PISTON AND ROD SEALS IN RECIPROCATING

APPLICATIONS - DIMENSIONS AND TOLERANCES - RECOMMENDATIONS

( First Revision )

UDC 621’226-214 : 621-762’6 : 621-242’4

0 BIS 1994

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

June 1994 Price Group 3

Basic Fluid Power Sectional Committee, PE 14

FOREWORD

This Indian Standard (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by Basic Fluid Power Sectional Committee had been approved by the Production Engineering Division Council.

’ In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. Sealing devices are used to contain the pressurized fluid with components having elements with linear motion. that is, hydraulic cylinders. These sealing devices are used with both cylinder rod and piston seal housings.

This standard was first issued in 1984 based on IS0 5597-l : 1980 Hydraulic fluid power - Cylinder rod and piston seals for reciprocating application - Dimensions and tolerances of housing: Part 1 Nominal series. As this IS0 has been revised as IS0 5597-1987 Hydraulic fluid power - Cylinders - Housings for piston and rod seals in reciprocating applications - Dimensions and tolerances and hence the revision of this Indian Standard has been taken up. In this revision following main changes have been incorporated:

- The range of cylinder sizes covered in the scope of this standard has been enhanced from ,16-400 mm to 16-500 mm.

- A new references clause 2 has been added in this revision.

- The tolerances of seal radial depth given in Table 3 have now been aligned with the requirements of IS0 5597-1987.

- The dimensions for piston seal housing, rod seal housing and seal housing radial depth have been aligned with IS0 standard.

It does not give details of seal design, since the manner of construction of seals varies with each manufacturer. The design and material of the seal and any incorporated anti-extrusion component are determined by conditions such as temperature and pressure.

This Indian Standard only applies to the dimensional criteria of products manufactured in conformity with this Indian Standard; it does not apply to their functional characteristics.

Indian Standard IS 10983 : 1994

FLUID POWER- CYLINDERS- HOUSING FOR PISTON AND ROD SEALS IN RECIPROCATING

APPLICATIONS- DIMENSIONS AND TOLERANCES- RECOMMENDATIONS

( First Revision )

1 SCOPE

This standard gives the dimensions and associated tolerances of housings for hydraulic and pneumatic seals for reciprocating applications. The range of sizes covered in this standard is 16 to 500 nun for cylinders and 6 to 360 mm for rods.

2 REFERENCES

IS 10416 : 1992 ‘Fluid power systems and components - Vocabulary’ is necessary adjunct to this standard.

3 TERMINOLOGY

Fordcfinitionsoftermsused inthis standard, reference shall be made to IS 10416 : 1992.

4 DIMENSIONS

4.1 Piston Seal Housing

The diniensions for piston seal housing shali be as given in Table 1 read with Fig. 1.

4.2 Rod Seal Housing

The dimensions for rod seal housing shall be as given in Table 2, read with Fig. 2.

4.3 Tolerance on Seal Housing - Radial Depth

The tolerance of the seal housing radial depth (Cross section) shall be as given in Table 3 (see Fig. 1 and 2).

4.3.1 The formulae for calculation of radial depth based on M (Fig. 1) and I@ (Fig. 2) are also given in Table 3. In most of the cases the use of t&se formulae and the values given in Table 3 (for example, limits of $D = H9 and w, = f8 for piston and w = f8 and wZ = H9 for rod) will result in tolerances within the span of w = h10 and +D = H10 respectively. Any relaxation of tolerance ou one housing component shall be compensated by the tighter tolerance on the other componenr to maintain Lhe necessary radial seal space limits.

4.4 Housing Length

The tolerance on housing length shall be + 025 mll1. 0

5 GENERAL

5.1 Illustraled examples of typical piston and rod seal housings are given in Fig. 1 and 2.

NOTE - These figures are diagramatic only and do not represent recommendations of a particular housing design.

5.2 All the sharp edges shall bc rounded and burrs shall be removed from corners of supporting surfaces, keeping in mind that these surfaces are required to provide maximum support against extrusion.

5.3 Design details are not provided in this standard as the constructing seals varies from manufacturer to manufacturer. The design and the material of the seal and any incorporated anti-extrusion component are ’ determined by the working conditions such as temperature and pressure.

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IS 10983 : 1994

5.4 Manufacturers may be consulted fordetails ofseal housing designs not covered in this standard.

5.5 Axial Length

This standard includes a choice of axial lengths for every nominal diameter of piston and rod (refer Tables 1 and 2).

5.5.1 Adopt axial length L only in consultation with the manufacturer.

5.6 Radial Depth

This standard includes an alternative seal housing radial depth (cross section) S, for each piston and rod diameter.

5.6.1 The deeper seal housing radial depth (cross section) shall be selected where higher stresses or wider tolerances are involved. However, consultation with the manufacturer is recommended when making the appropriate selection from the available choices.

6 EXTRUSION GAP

6.1 The extrusion gap shall be determined by the diameter (w, or @f,) of the adjacent metal components behind the seal.

NOTE-The maximum valueisachieved when the piston or the piston rod is in contact with one side of the cylinder or bearing, respectively.

6.2 The extrusion gap for piston seals is further increased by the expansion of the cylinder that occurs from internal pressure.

6.3 It is recommended that details concerning (pi, or wJ shall be agreed to between the housing,deslgner an the seal manufacturer.

7 SURFACE FINISH

The requirement of surface finish of the component in contact with the seal are dependent on the application and its life requirements and shall be agreed between the user and the manufacturer.

8 LEAD-IN-CHAMFER, C

8.1 The chamfer shall make an angle of 200 and 30’ with the axis (see Fig. 1 and 2).

8.2 The length of the chamfer shall be as given below:

Nominal Seal Housing 4 5 7.5 10 12.5 15 20 Radial Depth Cross Section, S, mm

MinimumLength 2 2.5 4 5 6.5 7.5 10 of Chamfer, C, mm

FIG. 1 HOUSING FOR PISTON SEAL

2

IS 10983 : 1994

Table 1 Nominal Dimensions For Piston Seal Housing ( Clnzrses 4.1,5.5 and Fig. 1 )

All dimensions in millimetres.

Bore Diameter

D

16

20

25

Radial Groove

Depth Diameter

S d

4 8

4 12

4 17 5 15

Axial Length L*

A-------

Short Medium Long

5 6.3 -

5 6.3 -

5 6.3 - 6.3 8 16

Fillet

Radius (kfU.X)

r

0.3

0.3

0.3 0.3

_

32 4 24 5 6.3 - 0.3 5 23 6.3 8 16 0.3

40 4 32 5 6.3 - 0.3 5 30 6.3 8 16 0.3

50 5 40 6.3 8 16 0.3 7.5 35 9.5 12.5 25 0.4

63 5 53 6.3 8 16 0.3

7.5 48 9.5 12.5 25 0.4

80 7.5 65 9.5 12.5 25 0.4 10 60 12.5 16 32 0.6

100 7.5 85 9.5 12.5 25 0.4

10 80 12.5 16 32 0.6

125 10 105 12.5 16 32 0.6 12.5 100 16 20 40 0.8

160 10 140 12.5 16 32 0.6 12.5 135 16 20 40 0.8

200 12.5 175 16 20 40 0.8 15 170 20 25 50 0.8

250 12.5 225 16 20 40 0.8 15 220 20 25 50 0.8

320 15 290 20 25 50 0.8

400 20 360 25 32 63 1.0

500 20 460 25 32 63 1.0

*The application of axial length Short, Medium and Long depends upon the respective working conditions.

0d ---id--

FIG. 2 HOUSING FOR ROD SEAL

Table 2 Nominal Dimensions for Rod Seal Housing ( Clnuse~ 4.2, 5.5 and Fig. 2 )

All dkensions in nCllimetres.

Rod Diameler

d

Radial IIOllSilIg

Deplh Diameter s D

Axial Length L*

6 4 14 5 6.3 14.5 0.3

8 4 16 5 6.3 14.5 0.3

10 4 18 5 6.3 14.5 0.3 5 20 - 8 16 0.3

12 4 20 5 6.3 14.5 0.3 5 22 - 8 16 0.3

14 4 22 5 6.3 14.5 0.3 5 24 - 8 16 0.3

16 4 24 5 6.3 14.5 0.3 5 26 - 8 16 0.3

18 4 26 5 6.3 14.5 0.3 5 28 - 8 16 0.3

20 4 28 5 6.3 14.5 0.3

5 30 6.3 8 16 0.3

‘2 4 30 5 6.3 5 32 - 8

4.5 0.3 16 0.3

(Con timed )

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is 10983 : 1994

Table 2 ( concluded )

25 4 33 5 6.3 14.5 0.3 5 35 - 8 16 0.3

28 5 38 6.3 8 16 0.3 1.5 43 - 12.5 25 0.3

32 5 42 6.3 8 16 0.3 7.5 47 - 12.5 25 0.4

36 5 ’ 46 6.3 8 16 0.3 7.5 51 - 12.5 25 0.4 .

40 5 50 6.3 8 16 0.3 7.5 55 - 12.5 25 0.4

45 5 55 6.3 8 16 0.3 7.5 60 - 12.5 25 0.4

50 5 60 6.3 8 16 0.3 7.5 65 - 12.5 25 0.4

56 7.5 71 9.5 12.5 25 0.4 10 76 - 16 32 0.6

63 7.5 . 78 9.5 12.5 25 0.4 10.5 ‘83 - 16 32 0.6

. 70 7.5 85 9.5 12.5 25 0.4 10 90 - 16 32 0.6

80 7.5 95 9.5 12.5 25 0.4 10 100 - 16 32 0.6

90 7.5 105 9.5 12.5 25 0.4 10 110 - 16 32 0.6

lb0 10 120 12.5 16 32 0.4 ‘. 12.5 125 - 20 40 0.8

110 10 130 12.5 16 32 0.6 12.5 135 - 20 40 0.8

125 10 145 12.5 16 32 0.6 12.5 150 - 20 40 0.8

140 IO 160’ 12.5 16 32 0.6 12.5 165 - 20 40 0.8

160 12.5 185 2 16 20 40 0.8 15 190 - 25 50 0.8

180 12.5 205 16 20 40 0.8 15 210 - 25 50 0.8

200 12.5 225 16 20 40 0.8 15 230 - 25 50 0.8

220 15 , 250 20 25 50 0.8

250 15 280 20 25 ’ 50 0.8

T 280 15 310 20 25 50 0.8

320 20 360 25 32 63 1.0

360 20 400 25 32 63

*The application of the axial lengths Short, Medium and Long depends upon the respective workitig cwditiole.

1.0

IS 10983 : 1994

Table 3 Tolerance on Seal Housing - Radial Depth (Clause 4.3, Fig. 1 and 2)

All dimensions in millimetres

Radial Depth S

Nominal

4

Tolerance

+O.lS -0.05

5 +0.15 -0.10

7.5 +0.20 -0.10

10 +0.25 -0.10

12.5 +0.30 -0.15

15 +0.35 -0.20

20 +0.40 -0.2

NOTE-

For Pistons Tolerance on groove diameter d (Fig. 1) shall be cabdated from the following formulae :

dMitr=2DMa.x-d3Min-2SMax d Max = d3 Min - 2s Min

For Rods

Tolerances on housing diameterD (Fig. 2) shall be calculated from the following formulae :

D Min = d5 Max t 2s Mitt DMa_r=2dMin-dSMaxt2SMax

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Revision of Indian Standards

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This Indian Standard has been developed from Dot : No. PE 14 ( 0086 1

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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