Proximity controls – Dwyer MPR User Manual

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PROXIMITY CONTROLS

Phone: 219/879-8000

www.dwyer-inst.com

A DIVISION OF DWYER INSTRUMENTS, INC.

Fax: 219/872-9057

e-mail: [email protected]

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

PrintedinU.S.A.8/13FR-#RB-443190-00Rev.4

3. CLEANING: Cleanpartsinwarmwaterandmildsoapandletairdry.

Usingdry,cleancompressedair,blowoutthebody.Ifanypartsare
damaged,consultthefactoryforanRGA (ReturnedGoods

Authorization) number.

4. TO REASSEMBLE:LubricateO-ringonsupplyseatwithquality

O-ringgrease.Tightensupplyseatintobodyofregulator.Makesure

thepintleslidesupanddownfreelyaftertighteningsupplyseat.
Tightenbonnetontobody.Do not over tighten, as it could strip
bonnet threads.

WARNING
1.TheSeriesMPRMiniaturePressureRegulatorsareintendedforuse

inindustrialcompressedairsystemsonly.Donotusewhere
pressureandtemperaturescanexceedthoselistedunder
SPECIFICATIONS inthismanual.

2.Inrelieving-typeregulators(MPR1),excesspressureisventedoutof

theregulatorwhenthereisanincreaseindownstreampressure
abovethepressuresetting.However,reliefcapacityislimited.Ifa
suddenincreaseindownstreampressurecouldruptureor
malfunctiondownstreamequipment,installapressure-reliefdevice
downstreamoftheregulator.Thecapacityofthereliefdevicemust
satisfythesystemrequirements.

3. Innon-relievingregulators(MPR2),downstreampressureabovethe

pressuresettingdoesnotrelievetoatmosphere.Anothermeansof
relievingpressuremustbeprovided,ifnecessary.

4. Beforeusingtheseproductswithanythingotherthanairorthe

specifiedfluids,fornon-industrialapplications,life-supportsystems,
orotherapplicationsnotwithinpublishedspecifications,please
consultthefactory.

MAINTENANCE
UponfinalinstallationoftheSeriesMPRMiniaturePressureRegulator,
no routine maintenance is required. A periodic check of the system
calibrationisrecommended.TheSeriesMPRisnotfieldserviceableand
should not be returned if repair is needed (field repair should not be
attemptedandmayvoidwarranty).Besuretoincludeabriefdescription
of the problem plus any relevant application notes. Contact customer
servicetoreceiveareturngoodsauthorizationnumberbeforeshipping.

MAINTENANCE
WARNING: Air supply pressure must be shut off before attempting
to install or disassemble regulator for servicing.

1. Ifairsupplyiskeptclean,regulatorshouldprovidelong periodsof

uninterruptedservice.Iferraticperformanceoccurs,itislikelythat
partsintheregulatorneedtobecleanedorreplaced.

2. TO DISASSEMBLE: Reduce pressure in inlet and outlet lines to

zero. Regulator can be serviced without removal from line.
Pullknobouttodisengagelockandturnknobcounter-clockwise
untilitstops.Thiswillremoveanyloadontherangespring.
Unscrewbonnet.Adjustingscrewandnutarenotretained,and
mayfallout.Removerangespringanddiaphragmassembly.
Unscrewsupplyseat(hexsocketsizeis9/16˝),andremovepintle
andpintlespring.

No.

1
2
3
4
5
6
7
8
9

Part Description
Knob
Bonnet
AdjustingScrew
AdjustingNut
RangeSpring
DiaphragmAssembly
SupplySeat
SupplySeatO-Ring
Pintle
PintleSpring
Body
PipePlugs

Material
Acetal
Acetal
Zinc-PlatedSteel
Zinc-PlatedSteel
Zinc-PlatedSteel
Acetal/Nitrile
Acetal
Nitrile
Aluminum/Nitrile
300StainlessSteel
ZincAlloy
Steel