ansi是什么意思i在线翻译读音例句

ANSI泄漏等级

SVF

LeakageClassificationsofControlValves

Classificationofseatleakagethroughcontrolvalves

Controlvalvesaredesignedtothrottleandnotnecessaryto

close100%.

Acontrolvalve\'sabilitytoshutoffhastodowithmany

eseatedcontrol

ding,seat

material,actuatorthrust,pressuredrop,andthetypeoffluidcan

allplayapartinhowwellaparticularcontrolvalveshutsoff.

SeatLeakageClassifications

Thereareactuallysixdifferentseatleakageclassificationsas

definedbyANSI/FCI70-21976(R1982).

Themostcommonusedare

CLASSIV

CLASSVI

ekindof

leakagerateyoucanexpectfromavalvewithametalplugand

metalseat.

at

Valvesarethosewhereeithertheplugorseatorbotharemade

fromsomekindofcompositionmaterialsuchasTeflonorsimilar.

ValveLeakageClassifications

ClassI-ValveLeakageClassifications

IdenticaltoClassII,III,andIVinconstructionanddesign

intent,isalsoknownas

dusttightandcanrefertometalorresilientseatedvalves.

ClassII-ValveLeakageClassifications

Intendedfordoubleportorbalancedsingeportvalveswith

ametalpistonringsealandmetaltometalseats.

0.5%leakageoffullopenvalvecapacity.

ServicedPor50psid(3.4bardifferential),whicheverislower

at50to125oF.

Testmediumairat45to60psigisthetestfluid.

SVFFlowControls,Inc.

SVF

Typicalconstructions:

Balanced,singleport,singlegraphitepistonring,metalseat,

lowseatload

Balanced,doubleport,metalseats,highseatload

ClassIII-ValveLeakageClassifications

IntendedforthesametypesofvalvesasinClassII.

0.1%leakageoffullopenvalvecapacity.

ServicedPor50psid(3.4bardifferential),whicheverislower

at50to125oF.

Testmediumairat45to60psigisthetestfluid.

Typicalconstructions:

Balanced,doubleport,softseats,lowseatload

Balanced,singleport,singlegraphitepistonring,lapped

metalseats,mediumseatload

ClassIV-ValveLeakageClassifications

Intendedforsingleportandbalancedsingleportvalveswith

extratightpistonsealsandmetalto-metalseats.

0.01%leakageoffullopenvalvecapacity.

ServicedPor50psid(3.4bardifferential),whicheverislower

at50to125oF.

Testmediumairat45to60psigisthetestfluid.

Typicalconstructions:

Balanced,singleport,Teflonpistonring,lappedmetalseats,

mediumseatload

Balanced,singleport,multiplegraphitepistonrings,lapped

metalseats

Unbalance《寻隐者不遇》唐 贾岛 d,singleport,lappedmetalseat一句话挽回爱情 s,mediumseat

load

ClassIVisalsoknownasmetaltometal

SVFFlowControls,Inc.

SVF

ClassV-ValveLeakageClassifications

IntendedforthesametypesofvalvesasClassIV.

Thetestfluidiswaterat100psigoroperatingpressure.

Leakageallowedislimitedto5x10mlperminuteperinch

oforificediameterperpsidifferential.

ServicedPat50to125oF.

Typicalconstructions:

Unbalanced,singleport,lappedmetalseats,highseatload

Balanced,singleport,Teflonpistonrings,softseats,lowseat

load

Unbalanced,singleport,softmetalseats,highseatload

ClassVI-ValveLeakageClassifications

atValves

arethosewheretheseatorshut-offdiscorboth

aremadefromsomekindofresilientmaterialsuchasTeflon.

Intendedforresilientseatingvalves.

Thetestfluidisairornitrogen.

Pressureisthelesserof50psigoroperatingpressure.

Theleakagelimitdependsonvalvesizeandrangesfrom0.15

to6.75mlperminuteforvalvesizes1through8inches.

PortDiameterinchesMillimetersBubblesper

minute

mlper

minute

12510.15

11/

23诗朗诵配乐 820.30

251

30.45

21/26440.60描写冬天景色的古诗

37660.90

4102111.70

61522

74.00

8203456.75

10254639

123058111.5

Typicalconstructions:

Unbala兀的拼音 nced,singleport,softseats,lowload

SVFFlowControls,Inc.

SVFFlowControls,

ControlValveLeakageClassification-Ov成吉思汗简介 erview

LeakageClassDesignation

MaximumLe之子于归宜其室家 akageAllowable

TestMedium

TestPressure

TestingProceduresRequiredforEstablishingRating

Ixxx

Notest

required

II

0.5%ofratedcapacity

Airorwaterat50-125o

F(10-52oC)45-60psigormaximumoperatingdifferential

whicheverislower45-60psigormaximumoperating

differentialwhicheverislowerIII

0.1%ofratedcapacityAsaboveAsabove

Asabove

IV0.01%ofrated

capacity

Asabove

AsaboveAsabove

V

0.0005mlperminuteofwaterperinchofportdiameterper

psidifferentialWaterat50

to《先干为敬》 125o

F(10to

52o

C)Maximum

service

pressure

dropacrossvalveplug

nottoexceedANSI

bodyratingMaximum

service

pressuredropacrossvalve

plugnottoexceedANSI

bodyrating

VI

Nottoexceed

amountsshowninthetableabove

Airornitrogenat50to125o

F(10to52o

C)50psigormaxrateddiffer袁枚怎么读 entialpressureacrossvalveplug

whicheverislowerActuator

shouldbe

adjustedtooperating

conditions

specifiedwith

fullnormalclosingthrust

appliedto

valveplugseat