is.4410.16.2.1981 Gates and valves, valves.pdf

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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 authorities,in order to promote transparency and accountability in the working of every public authority,and whereas the attached publication of the Bureau of Indian Standards is of particular interestto the public, particularly disadvantaged communities and those engaged in the pursuit ofeducation and knowledge, the attached public safety standard is made available to promote thetimely dissemination of this information in an accurate manner to the public.

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Invent a New India Using Knowledge

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Step Out From the Old to the New

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The Right to Information, The Right to Live

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Reaffirmed 2001


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IS : 4410 Par t XV Sec 2 1981

ndi n t nd rd

GLOSS RY OF TERMSRELATING TO RIVER V LLEY PROJE TS

P RT XVI G TE S N V LVE S

e ction Valves

Terminology Relating to River Valley Projects Sectional Committee,BDC 46

ChairmanSHRI P. KII.PILA

RepresentingMinistry of Agriculture I r rigat ion , New Delhi

of Uttar

Township

In personal capacity M-IB NDSE, Part II, NewDelhi 110049 )

Ministry of Agriculture an d I r rigat ion , New DelhiHydro-Consult International P vt L td , New Del h i

Indian Institute of Technology, New DelhiGeological Survey of India, Calcutta

DIRE TOR C D O )

SHRI H. G. JOSHI AlternateDR R. C. HOON

DIRE TOH

SHRI K. K. DHRUVE AlternateDIRE TOR HYI?ROLOGY) Central Water Commission, Ne w DelhiSHRI N. K . DWIVEDI Irrigation Department, Government

Pradesh, LucknowBeas De si gns Organ iz at ion , Nanga l

PunjabSHRI C. GUPTA

Members

CHIEF ENGINEER DRAINAGE) Irrigation Works, Government of Punjab,Chandigarh

DIRE TOR WATER RESOUR ES AlternateCHIEF ENGINEER IRRIGATION) Public Works Department, Government of Tamil

Nadu, MadrasSENIOR DEPUTY CHIEF ENGINEER Alternate

SHnI S. M . DEB Irrigation Water Works Department, Govern-ment of West Bengal, Calcutta

Irrigation Department, G 0 v r n n t ofMaharashtra, Bombay

Irrigation Department, Government of MadhyaPradesh , Bhopal

OINT OMMISSIONERSHRI K. V. KRISHNAMURTHYSHRI P. N. KUMRA Alternate

PROF P. N T R J NSHRI G. PANT

SHRI R. P. SINGH AlternateContinued on page 2 )

Copyright 1982INDIAN STANDARDS INSTITUTION

Th is p u bl ic at ion is protected under th e Indian Copyright Act X IV of 1957) an dreproduction in whole or in part by a ny m ea ns except with written permission of th epubli sher shal l be deemed to be an infringement o f copyright under th e said Act.


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IS : 4410 Par t XV Sec 2 1981

Continuedfrom l a g , 1

MembersSHRI]. RAJA RAO

Repres,ntingIrrigation Power Department Govemment of

Andhra Pradesh, Hyderabad

Director General, lS I Ex ojJicio Member

DR P. P. SEHG LSENIOR DIRECTOR

Deputy Director Alternat, SHRI G. R M N

Director Civ Engg

DR]. PuaUSHOTTAH Alterllat, SHRI D lIlOD R S HU Irrigation Power Department Government of

Orissa, BhubaneahwarUniversity of Roorkee, RoorkeeSurvey of India D eh ra D u n

SecretarySHRI V. K LY N SUND R M

Assistant Director Civ E ng g , lSI

Panel for Glossary of Terms Relating to Gates an d Valves,BDC 46: P9

onvener

SHRI V.J . P TILDEPUTY DIREOTOR GATES

DESIGNS-II Alternate

Central Water Commission, New Delhi

MembersDIREOTOR HE D SHRI 1. C. GUPTA

SHRI H. G. JOSHI Alternat,SHill N ND GOP L

Central Electricity Authority New DelhiBeas Project, Talwara

Tungabhadra Steel Products Ltd Bellary District,Karnataka

SHRI G. S. NNIGERD AlternateSHRI N. Y. N R SIMH N Bharat Heavy Electricals Ltd Bhopal

SHRI C. VERM AlternateSHRI P. C. S XEN Central Water Power Research Station Pune

SHRI Y. S. KELK R AlternateSHRI N. SH RM Irrigation Department Punjab

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IS : 4410 Pa r t XVI/Sec 2 1981

ndian tandard

GLOSSARY OF TERl\.fSRELATING TO RIVER VALLEY PROJECTS

P RT XV I G T S N V LV S

Sect icn Valves

R E W 0 R D

0.1 This Indian Standard Part XVI/Sec 2 ) was adopted by th e IndianStandards Institution on 27 November 1981, after th e draft finalized byth e Terminology Relat ing to River Valley Projects Sectional Committeehad been approved by th e Civil Engineering Division Council.

0.2 A number of Indian Standards have been publ ished covering variousaspects of river valley projects and a large number of similar standardsar e in the process of formulation. T he se s ta nd ar ds include technicalterms, precise definitions of which ar e required to avoid ambiguity intheir interpretation. To achieve this e nd , t he Indian Standards Institutionis b ri ng in g o ut this glossary of terms relating to_ river val ley projects IS : 4410), which is being published in parts. Part: XVI covers th eimportant field of gates and valves. It ha s got tw o sections, this sectiondealing with valves and th e other section with gates already published ).

0. 3 In the formulation of this standard, due wei gh tage h as b een given tointernational co-ordination amo ng t he s tan da rd s an d practices prevailingin different countries in addition to relating it to th e practices in th e fieldin India. This has been met by der iv ing ass is tance from th e following

publications:A SCE. Am erican Society of Civil Engineers. Nomenclature for

hydraulics. 1962. New York.

Design Standards No.7 Valves, Gates and Steel Conduits, UnitedStates, Department of th e Interior Bureau of ReclamationCommissioner s Office. Denver, Colorade.

India. International Commissio n on Irrigatio n a nd Drainage.

Multilingual technical dictionary on irrigation and drainage. 1967.

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IS : 4410 a r t XVI/Sec 2 ) 1981

India. Central Board of Irrigation and Power. Glossary ofirrigation and hydro-electric terms a nd s ta nd ar d notations usedin India. 1954. Manager of Publications. Delhi .

0.3.1 All th e definitions taken from Multilingual technical dictionaryon irrigation and drainage are marked with asterisk in t he s t andard.

1. SCOPE

1.1 This standard Part XVI/Sec 2 covers th e definitions of th e termsrelating to valves.

2. VALVES

2.1 A ir Valve - A valve that releases air from a p ipeline automaticallywithout loss of water, or introduces ai r into a line automatically if th einternal pressure becomes less than th e atmospheric pressure.

2. 2 A ir I nl et Valve - An air valve that introduces ai r into a p ipelineautomat ically when th e internal pressure falls short of the atmosphericpressure by an amount to sui t th e requirements of a particular system.

2.3 A ir Ou t l e t Valve - An ai r valve that releases air from a p ipelineautomatically without loss of water.

2.4 A ir Relief Valve - An ai r v al ve p ro vi de d on high locations ofpipeline for letting ou t ai r automatically and preventing the pipeline frombecoming a ir b ou nd with a resul tant increase in pressure.

2.5 Alt i tude Control Valve - A v al ve whi ch aut omat ical ly shuts of fth e flow when the water level reaches a predetermined elevation in anelevated tank and opens when th e pressure on th e pump side is less thanthat on th e tank side of th e valve.

2. 6 An gl e Va lv e - A valve having generally a spherical body in whicht he bod y ends ar e at right angles to e ac h o th er an d in which th e disc islifted from or lowered on t he b od y seat by a spindle whose axis is in linewith that of one body end.

2.7 Automat ic Valve - A valve which opens or closes automaticallywhen prescribed conditions ar e reached.

2. 8 Balanced Needle Valve - A needle valve of improved design inwhich th e needle is moved by water pressure from th e outlet conduit,which acts on interior chambers in th e valve. The movement is

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controlled by a hand wheel ins ta lled above the valve w ith t he motiontransmitted through shafting and gearing to a posit ive posit ioning devicelocated inside the valve Fig. 1 .

NEE LE

FI G . BALANCED NEEDLE VALVE

2 9 a la n c ed Va lv e - A valve wit h both sides of th e closing mechanismin contact with water and which opens and closes due to th e differencein water pressure, or water pressure plus other pressure, exerted upon th esides of th e closing mechanism.

2 10 a ll Va lv e - A simple non return valve consisting of a ball restingon a cyl indr ical seat.

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2.11 Bib T ap - A valve closed by screwing down a leather or fibrewashered disk onto a seat in th e valve body.

2.12 Blow-oft S c o . r Valve - A take-out connection with a gatevalve placed at or n ea r t he low point of a syphon:

a) to empty th e syphon when necessary to make repairs;

b) to use it as a wasteway; and

c) to scour ou t material deposited in the syphon.2.13 Fill ing Valve - A relatively small gate for by passing a main gate.

2 . Bypass Valve - A small pilot valve used in connection with alarger valve or a gate to equalize th e pressure on both sides of th e largervalve or a gate before opening it.

2.15 B.t ter f ly Valve - A valve in w hic h t he disk is turned abou t 90from th e close to th e open position, about a spindle supported on th e bodyof th e valve on an axis transverse to t ha t o f the valve ( Fig. 2 ).

IG 2 BUTTERFLY VALVE

2.16 Check Valve o r Non-retu rn Valve - A valve which preventsreversal of flow by means of th e check mechanism, th e valve beingopened by th e flow of fluid and closed by th e weight of th e checkmechanism when th e flow ceases, or by back pressure.

2.17 Cone Valve - A valve in which the moving plug is conical.

2.18 Double Flanged Valve - Valves w hi ch a re i nt en de d specificallyfor use with two sets of bolts, each f lange being individually bolted.

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2.30 Bowell hunger Valve Cylindrical Valve - A valve having twotelescopic cylinders with a streamline dispersing cone secured to t he i nn ercylinder by radial ribs. Th e outer cylinder closes the sideway openingbetween th e cone and the inner cylinder when it is slided in position. Inits open positlon, t he w at er is discharged on the sides of th e cylinder inth e form of a highly diverging hollow inside in the shape of a cone Fig. 5 .

;

..

, == _ J

; . .

FIG. 5 H O W E L L B u N G E R VALVE CYLINDRICAL VALVE

2.31 Hydraul ic Valve o r Regulating Valve - A valve to regulate orcontrol flow in conduits, pipelines and penstocks operated by means of ahydraulic cylinder or any o ther device.

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2.32 In l ine Tube a l v e A tube type valve used in th e central portionof conduits an d having long bodies with a 3 0 nozzle. The valve iaprovided with ai r inlets to a era te th e jet immediately downstream fromt he v al ee seat.

2.33 I n t e r i o r Different ial Needle Valve - A differential needle valvewith a needle that telescopes over a member fixed to the valve bodyinstead of moving within the v al ve b od y as in th e case of an internaldifferent ial needle valve Fig . 6 .

TELESCOPINGNEEDLE

FIG. 6 I NT E R IO R D IF F ER E NT I AL N EEDLE VA LV E

2.34 In te rna l Different ial Needle Valve - This is an improved typeof balanced n ee dle v al ve w ith three chambers in th e needle. The tw oen d chambers are connected. The valve is operated by th e differentialthrust resu lt ing from the changes in pressure in the chambers withrespect to that in th e central chamber through a 1valve paradox ~ ; ~ F i g ~.

2.35 Lock Gate Valve - A valve, such as register valve, slide valve andbutterfly v alv e, fitted in lock gates to facilitate filling and emptying ofth e lo chamber.

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IS : 441 Part XVI/Sec 2 / 9

FIG INTERNAL DIFFERENTIAL N EE DL E VALVE

2.36 ow Leakage R ate Valve - A valve whi ch h as an agreed amount

of leakage i n t he closed position.2.37 Motor-operated Needle Valve - A needle valve in which th eposition of th e needle is controlled by a motor-operated ro d s Fig. 8 .

2.38 ud Valve - A plug valve for d ra in in g o ut sediment inser ted inth e bottom of ~ t t i n gt ann .

2.39 Ne ed l e Va lv e - A valve with a circular outlet through which theflow is controlled by means of a tapered n ee dl e w hi ch ex ten ds throughth e outlet reducing the area of th e outlet as it extrudes and enlargingth e area as it retreats.


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indicator is provided in th e control stand to give the operator t he e xa ctneedle position.

This control system makes it possible to move hydraul ica lly th eneedle throughout th e extreme ranges of travel without r eq uirin g th epresence of water in th e conduits. I t also makes th e routine inspectionand scale removal operations much easier to perform.

2.41 Para l l e l Sl id e Va lv e I t is essentially a gate valve in which th egate consists of tw o discs wit ho ut spreadi ng mechani sm excep t for aspring which slides between two paral le l body seats.

2.42 Pi lo t Valve A small valve to admit liquid to operate a biggervalve.

2.43 Plug Valve A valve in which th e movable control element is acylindrical or conical plug in contrast to a flat disc.

2.44 P o p p e t Valve 0 1 Mushroom Valve A valve consisting of a flatdisk which raises and lowers without rotation about th e valve openingb ei ng k ep t in position a nd p at h of travel by a ro d or shaft attached to th edisk at right angles to it extend ing th ro ug h the v alv e opening into agroove or hole which guides its movement.

2.45 Pressure reduc ing Valve A valve for reducing pressureautomatically according to th e setting of th e pressure regulating valves.

2.46 Pressure regula t ing Valve A v al ve p laced at either en d of apressure regulat ing apparatus to regula te the pressure.

2.47 Pressure re l ief Valve/Relief Valve/Safety Valve A valvewhich opens automatically w he n t he pressure reaches an assigned limit.

2.48 Pr i m i ng Valve A valve connected wi th th e discharge pipe of a

force pump through which th e pump may be primed.

2.49 R a di al G a te Valve A valve in t he f or m of a radial gate used inth e inlet or outlet of a conduit.

2.50 ReBux Valve A non re turn valve used in a pipeline at a risinggradient to prevent water which is ascending th e gradient from flowingback in the event of a burst lower down.

2.51 Regis ter Valve A mechanical device in which th e travel of th evalve from th e closed to th e open position is equal to th e height of one ofth e openings.

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2.52 Safety Valve 2.47.

2.53 Sc re w -do w n Stop Valve A valve in which th e disk is liftedfrom and lowered on to the body seat by a stem whose axis is perpendicularto the face of th e body seat.

2.54 Slide Gate Valve A slide g at e u sed in the inlet or out le t condu itof a lock to control th e level of water in the lock chamber.

2.55 Slid ing Sleeve Valve A valve having two telescopic cylinderswith a streamline dispersing cone secured to th e inner cylinder by radialribs. The inner sleeve closes th e opening between th e cone and outersleeve when it is slided in position. In its open position th e water je tis discharged at 90 with respect to the axial centreline of th e valve see Fig. 9 .

2.56 S lu ic e Val ve An y valve installed in a conduit or a pipeline tocontrol th e flow. In river valley projects this term is generally appliedto valves which are relatively bi g in size.

2.57 Spher ica l o r Rotary Valve A valve consisting of a casing moreor less spherical in shape t he gate turning on trunions through 90 whenopening or closing and having a cylindrical opening of t he s am e diameteras that of t he p ip e it serves see Fig. 10 .

2.58 Stop Valve A valve with suitable means of connection forinsertion in a pipeline for controlling or stopping flow.

2.59 Three-way Valve A valve constructed with three fluid ways andwith a mo veable element operated by a q ua rt er turn to provide passagebetween either pair of adjacent fiuidway.

2.60 Thr o t t l e Valve A valve used only to restr ict t he a mo un t of flowin th e pipeline.

2.61 Tube Valve An improvement over the needle valve. The waterpassages ar e similar to th e internal differential valve except that th e

downstr eam end of th e need le is omitted. A tube or hollow cylindersimilar to that of th e cylinder gate instead of a needle comprises themoving part of th e valve. This is actuated by a hydraulic cylinder andpiston and a pressure pump or by a screw with an electric motor or bymanual control se Fig.

2.62 Vacuu l Il Va lve An ai r v al ve whi ch permits ingress of ai r in to anempty pipe to counteract a vacuum.

2.63 Valve A device ins talled in a pip line for th e purpose of controll-in g t he magni tude and direction of the flow.

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AIR VENT

FLOW--SLEEVE

TERNATIVE DESIGN

WITHOUT CONICAL MEMBER

I VA LV E e LO ,S ED

; C O N/ j : L

D Ei A ll

WITH C ON IC AL M EM BE R

VALVE CLOSED

FIG. S LI DI NG S LE EV E VA LV E

15

GREASEFITTING

HOIST

STEM

GREASENIPPLE


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ZUJa.o...Ju Clz >0-U

FLOW OF- T R

F I G 10 SPH ER IC L OR R O T R Y V LV E

-,

-, ,,

CLOSED POSITION

F I G 11 T U B E V LV E

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is.4410.16.2.1981 Gates and valves, valves.pdf