Pentair Keystone Figure 952 NPS 2 Installation instructions

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KEYSTONE FIGURE 952 KNIFE GATE VALVES
NPS 2 - 24 DiSaSSembly iNStructioNS
© 2012 Pentair Inc. All Rights Reserved.
Removal, disassembly and inspection instructions.
RISING SPINDLE VALVES
•Ensureallpartsarecleanandfreeofforeign
material, particularly the chest area between
the gland and valve bore.
•Foroptimumleak-freeservice,gatefaces
andedgesmustbesmooth,andfreeof
gallingorburring.Repairorreplaceif
excessively worn or damaged.
•Seatingfacesinvalveboremustbesmooth
andundamagedotherwiseleakageislikely
tooccur.Replaceifnecessary.
•Checkglandsealingfacesontopof
valve body. They should be smooth and
undamaged.Repairifnecessary.
•Checkthreadsonspindlesandbolts-
repair/replaceifnecessary.
•Replacelocknutsifthreadsarestripped
orweakened.Theseareusedasprotection
against vibration.
•Checkandreplacegateguides(13)ifnecessary.
NOTE:
NPS2-8F952valveillustrated
NOTE:
NPS10-24F952valveillustrated
www.pentair.com/valves PPLBE-0004-US 14/07
REMOVAL AND DISASSEMBLY
1. Ensure pipeline is not pressurized and that
any hazardous medium is drained away.
2.Largevalvesneedachainblockorcraneto
assist.Iflarge,heavycylindersarefitted,they
canberemovedfirstiffeltnecessary:
 •Disconnectactuatorairlinesandpower
supplies etc.
 •Supportactuator,disconnectactuatorrod
fromvalvegate,undobridgeboltsorhold
downbolts,removeactuatorfromvalve.
3.Supportvalvebodyandremoveallflange
bolts.
4.Removevalveandgasketsfromthepipeline.
For NPS 2-8 valves
 •Loosenglandboxnuts(10)toendofpillar
(9)threads.Removeclevisfastener(15).
Removebothbridgenuts(13).
 •Removehandwheel(oractuatorassembly.
Unscrewbothpillars(9)andremove.
For NPS 10-24 valves
 •Removeglandboxnuts(10)andwashers
(11,12).Removeclevisfasteners(19,20).
 •Removeuprightbolts(14)andwashers(15)
atvalvebody(1).Removepillarnut(23)and
washer(22).
5.Withdrawglandbox(3)andgate(2)assembly.
6.Removegateguides(13)fromvalvebody(1).

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KEYSTONE FIGURE 952 KNIFE GATE VALVES
NPS 2 - 24 DiSaSSembly iNStructioNS
NON - RISING SPINDLE VALVES
•Ensureallpartsarecleanandfreeofforeignmaterial,particularlythechestareabetweenthe
gland and valve bore.
•Foroptimumleak-freeservice,gatefacesandedgesmustbesmooth,andfreeofgallingor
burring.Repairorreplaceifexcessivelywornordamaged.
•Seatingfacesinvalveboremustbesmoothandundamagedotherwiseleakageislikelytooccur.
Replaceifnecessary.
•Checkglandsealingfacesontopofvalvebody.Theyshouldbesmoothandundamaged.Repair
ifnecessary.
•Checkthreadsonspindlesandbolts-repair/replaceifnecessary.
•ReplaceNylocnutsifthreadsarestrippedorweakened.Theseareusedasprotectionagainst
vibration.
•Checkandreplacegateguides(11)ifnecessary.
REMOVAL AND DISASSEMBLY
1. Ensure pipeline is not pressurized and that any hazardous medium is drained away.
2. Largevalvesneedachainblockorcranetoassist.Iflarge,heavycylindersarefitted,theycan
beremovedfirstiffeltnecessary:
•Disconnectactuatorairlinesandpowersuppliesetc.
 •Supportactuator,disconnectrodfromvalvegate,undobridgeboltsorholddownbolts,
removeactuatorfromvalve.
3. Supportvalvebodyandremoveallflangebolts.
4. Removevalveandgasketsfromthepipeline.
 •Removeglandboxnuts(8)andwashers(21,10).Removeclevisfasteners(13)andwashers
(22).
 •Removeuprightmountingbolts(12)andwashers(14)atvalvebody(1).Removepillarnut(19)
andwasher(9).
5. Withdrawglandbox(3)andgate(2)assembly.
6. Removegateguides(11)fromvalvebody(1).
NOTE:
NPS10-24F952non-risingspindlevalveillustrated.
PENTAIR VALVES & CONTROLS
www.pentair.com/valves
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