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Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to

information for citizens to secure access to information under the control of public autho

in order to promote transparency and accountability in the working of every public authoand whereas the attached publication of the Bureau of Indian Standards is of particular in

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IS 130

I ndian St andardBUTTERFLY VALVES FOR GENERAL

PURPOSES( irst Reprint JUNE 19 )UDC 621.646.25 : 669*13/*14

(Reaffirm

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Chemical Engineering Plants and Related EquipmerIt Sectional Committee, HMD 17

FOREWORDThis Indian Standard was adopted by the Bureau of Indian Standards, after the drafChemical Engineering Plants and Related Equipment Sectional Committee had been Heavy Mechanical Engineering Division Council.The satisfactory performance of any valve depends on design, manufacture, correct instatenance. This standard specifies the requirements for design and manufacture but maintenance.Particular requirements should be indicated by the purchaser in his purchase order or enqIn the preparation of this standard assistance has been derived from BS 5155 : 198+ butterfly valves issued by British Standards Institution ( BSI ).For the purpose of deciding whether a particular requirement of this standard is complivalue, observed or calculated, expressing the result ol a test or analysis, shall be rounded with IS 2 : 1960 Rules for rounding off numerical values ( reuised . The number of

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I ndian StandardBUTTERFLY VALVES FORPURPOSES GENERAL

1 SCOPE1.1 This standard covers double flanged andwafer type of metal seated, resilient seated castiron, ductile iron and carbon steel and linedbutterfly valves for general purposes. Valvescovered under this standard are manually,pneumatically, hydraulically or electrically ope-rated.1.2 I t covprs valves of nominal pressure designa-tions up to and including 4 MPa and Class 300with ends flanged in accordance with appropriatetables of IS 6418 : 1971 Cast iron and malleablecast iron flanges for general engineering purposes or wafer type valves with bodies designed to beaccommodated between pipe work flanges in

lug type, U-section or flangeless typeFig. 2, 3, 4, 5 and 6.

FJ G. 2 BUTTBRFLYVALVB, SINGLWAFER TYPE

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-1s 13095 Y l m5 SERVICE APPLICATIONS5.1 Valves shall be suitable for one or more of thefollowing applications:

a) Tightshut off - A valve having no visi-ble leakage past the discin closed position underteat conditions.b) Regulating - A valve intended forregulating purposes andwhich may have a clea-rance between the discand the body in close

position.c) Low leakage - A valve which has speci-fied maximum leakagerate past the disc in theclosed position.

in Annex B. Flanges as per anrequirements of the purchaser maas agreed to bttween the manufapurchaser or as per IS 13159 ( Part9.1.1 Flanges shall be at right anglthe bore and concentric with theshall be drilled unless otherwise spholes shall be off centres. Tappeflanges may be used when requiredof the valve.

5.2 Vacuum ConditionWhere valves are to be used under vacuumconditions, purchaser shall mention specilicallyand the detailed design provision shall be mutu-ally agreed between the purchaser and the manu-facturer.

9.2 Wafer Body Enda9.2.1 Body ends shall be capable between the pipe flanges comprequirements of Annex B flange dr9.2.2 The joint faces shall be at the axis of the bore and concentric9.2.3 Holes may be provided, whthe design, for the passage of thethe flanges and the valve. Where is not particable due to the presencbearing housing, tapped holes m

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Table 1 Face to Face DimensionsClauses 10.1 to 10.3

All dimensions in millimetres.NominalSize I

Doable Flaw Double Flan- Wafer Shortged Short ged Long-- _IWafer WaferMedium Long

Face-to-face dimensions fornominal pressure not exceeding Face-to-face dimensions for nominal pressurenot exceedingPN 25 PN 40 PN 25

Class 125/:50 Class 300 Class 125/150

DN mm mm40 106 14050 108 15065 112 17080 114 180

100 127 190

--

W

4

-

1mm3343464652

PN 2.5Class 150-

5 -mm------

-

IfT--

PN 25 PClass 125/150 Cl

6mm---.6464

I

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IS 13095 : 199114.2 For valves DN 350 and above, a bearing shallbe provided to take the axial thrust, springretaining clips ( circlips ) shall not be used asthrust bearing.14.3 Suitable sealing shallshaft where it passes outsideing enclosure.

be provided for thethe pressure contain-

15 MATERIALSThis standard is based on materiaTable 2. Unless otherwise agreedshall be of a grade equivalent to Table 2 or superior. Other materiaas per agreement between the mathe purchaser.

Table 2 Basic Materials

Component Material IS Referred Grade

Body Cast iron 210 : 1978 FG 200, Spheroidal graphite iron 1865 : 1974 SG 40011Carbon steel 2004 : 1978 Cl. 2 or 1875: 1978 Cl. 2 or 2856 : 1987 Gr 1 or

Disc Cast iron 210 : 1978 FG 200, Spheroidal graphite iron 1865 : 1974 SG 400/1Carbon steel 2004 : 1978 Cl. 2 or 1875 : 1978 Cl. 2 or 2856 : 1987 Gr 1 or Stainless steel 3444 : 1987 Gr 6 or Gun metal 318 : 1987 Gr - LT

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16 OPERATION16.1 Manual OperationAll valves shall be capable of being operated at adifferential pressure across the disc as marked onthe valve. Lever worm gearltravelling nut typeor any other suitable type of operator can beused.16.1.1 irectionUnless otherwise specified manually operatedvalves shall be closed by turning handwheel oriever in a clockwise direction when facing thehandwheel or lever. The design of lever whenfitted shall be such that the lever may only beassembled to the valve so that it is parallel to thedirection of flow when the valve is open.16.1.2 Al] gear travelling nut operators shall beprovided with suitable stops to prevent movementof the shaft beyond the limit correspnding to thefully closed position of the disc.16.1.3 All gear/travelling nut operators shall be

IS 116.5.3 Rod seals and piston caps shall rubber or other material equally shydraulic service.16.6 Pneumatic Operators16.6.1 With cylinder operation pressumaintained on the cyclinder piston aof its stroke unless other means are prevent drifting.16.6.2 Cylinders shall be equipped wiper to clean the piston rod before itcylinder. Alternatively cylinder with should be housed in weather-proof enc16;6.3 Rod seals rod wiper and pistobe of neoprene nitrile rubber or material suitable for air service16.6.4 Cylinders shall be equipped wable cushions at each end of the sspecified.17 TESTINGAll valves shall be hydrostatically te

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I8 19995 i 1991Table 3 Test Durations

( Claue~ 17.2, 17.3 and 17.4 )

Nominal Dia I Mimimum Test Durationin Minutes for II Imm Body Test I Seat TestWhen Applicable

Up toand including 56 0.25 02565 to 150 1 1

200 to 300 2 2350 to 1006 5 2

1200 to 2 000 5 3NOTE - During the body teat, there rhall be no leak _age through the metal end joints or the valve shaft real,nor shall any part be permanently deformed.

this standard and stating the actmedium used in the test.Table 4 Leakage ( Clause 17.5 )

Valve Type Lea

Tight shut-off INo visibduration

Low leakage 01 mms

Regulating INot spescope of

NOTE - Applicable to sizes DN Leakage rates for larger sizes are this standard.17.3.1 Each valve shall be shop tested for leaks 19 INSPECTION

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-23 lNFORMATION TO BE FURNISHED BYTHE PURCHASER IN AN ORDER OR.ENQUIRY

1) General requirements9ii)

iii)iv)

Size of the valveQuantityFluid handled

. . . . . . . . . mm

Maximum working . . _ . . . --.MPapressure

v) Design pressure . . . . . . . . . . MPavi) Maximum differen- . . . . . . . . . . . MPatial pressure ( whenvalve shut )

vii) Maximum flow . . __. . . . .ms/ h andcorresponding pre-ssure...MPaviii) Normal flow . . . . . . . . . . . . ma/h

ISii i) Low leakage rateiv) Suitability for flow in both

3) Mode of operati oni) Manual with fever or hchainwheelii) Power/voltage/frequency/No.air supply pressure/type of

ii i) Direction of rotation of haniv) Orientation of handwhereference to pipeline

4) 7-e of constructioni) Flanged or wafer [ lug wafer flangejflangeless wa

wafer Jii) Face to face dimension (

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I 15095:1991

IS x0.2856 : 1987

. 3444 : 1987

Nom inal Pr essurePN

0.25

TitleGarbon steel castings for pres-aure comaing parts suitable forhigh temperature service( fusion welding quality ) ( th i rdrevisionCorrosion resistant high alloysteel and nickel based castingsfor general applications ( secondrekrion

IS Jb.4854( Part 3 ) : 1974

6392 : 19716603 : 19729866 : 198113159( Part 1) : 1991

ANNEX B( lauses .1 and 9.2.1 )

Tit leGlossary of termstheir parts: PartvalvesSteel pipe flangesStainless steel baMarking system Steel pipe flangefittings: Part 1 D

DIMENSIONS OF FLANGES AND DRILLINGZntegtuf Crey Cnst MnlLnble Cast IronI ron Flanges I nt egral Flanges

In accordance with NilIS 6418 : 1971Table 2

St eel Pl at e Fl angesfor WeldingIn accordance with ManIS 6392 : 1971 StaTable 3

I nt egra

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Bureau of Indian StandardsBIS is a statutory institution established under the Bureau of I ndian Standards Act,harmonious development of the activities of standardization, marking and quality certificatattending to connected matters in the country.Copyright rBIS has the copyright of l1 its publications. No part of these publications may be reprodwithout the prior permis ion in writing of BIS. This does not preclude the free use, implementing the standard, of necessary details, such aS symbols and sizes, type or gEnquiries relating to copyright be addressed to the Director (Publication), BIS.Review of Indian StandardsAmendments are issued to standards as the need arises on the basis of comments. Standards periodically; a standard along with amendments is reaffirmed when such review indicates tneeded; if the review indicates that changes are needed, it is taken up for revision. Users oshould ascertain that they are in possession of the latest amendments or edition by referring of BIS Handbook and Standards Monthly Additions.This Indian Standard has been developed from Dot: No. HMD 17 ( 3744 )

Amendments Issued Since Publication

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AMENDMENT NO. 1 AUGUST 1996TOIS 13095 : 1991 BUTTERFLY VALVES FGENERAL PURPOSESPage2, clause 7.1, line 5 ) - Substitute the following for the e

PN 0.25, PN 0.6, PN 1.0, PN 1.6, PN 2.5 and PN 4.0.

(Hh4D17)Reprography Unit, BIS, N