Dwyer MPR - Manual

Series MPR Miniature Pressure Regulator
Specifications - Installation and Operating Instructions
Bulletin V-MPR
The Series MPR Miniature Pressure Regulators are compact units
that provide low cost, high performance pressure regulation of
compressed air or water. The low torque, non-rising adjustment knob
with locking capability provides easy and precise regulation and
preventsleakage.Thecompactsizeandlightweightconstructionmake
this unit ideal for the OEM market and portable equipment including
adhesive dispensers, printing presses, medical equipment, spray
equipment, analyzers, pumps, compressors, welding machines and
manymore.ModelMPR1isarelievingregulatorandmodelMPR2isa
non-relieving regulator. (The MPR2 is typically used in water
applications). When controlling air, Series MPR should be used in
constantflowordownstreampressurereliefapplications.
INSTALLATION
1. System piping should be the same pipe size as regulator ports. 
Locateregulatorascloseaspossibletothedeviceusingregulated
air. If cycling devices and/or lubricators are used in the piping
system, install the regulator upstream of these devices. A filter
installedupstreamoftheregulatorisrecommendedtomaximize
servicelife.
2. The arrow on the regulator body indicates direction of air flow.
Connectpipingtoproperportsusingpipesealantonmalethreads
only.Donotallowsealanttoenterinteriorofregulator.TheSeries
MPR canbeinstalledatanyangle.
3. Two1/8˝NPT gaugeportsareprovidedtoallowfortheconnection
ofanoutletpressuregaugeorasadditionaloutletsforregulatedair.
Plug unused gauge ports. Panel-mounted units require a 1 3/16˝
(6.350mm)diameterholewithamaximumpanelthicknessof1/4˝
(4.8mm).
ADJUSTMENT
1.Pulltheknoboutwardtounlockandadjustpressuresetting.Before
turning on system air pressure, turn regulator knobcounter-
clockwisejustuntiltheknobstops.Turnonsystemairpressure.Turn
regulatorknobclockwiseuntiloutletpressurereachesdesiredsetting.
2. When changing pressure setting, always approach the desired
pressure from a lower setting. For example, lowering the outlet
pressurefrom80psito60psiisbestaccomplishedbydroppingthe
outletpressureto50psi,andthenadjustingupto60psi.
3. Pushknobinwardtolockpressuresetting.
SPECIFICATIONS
Service: Compressedairorwater.
Port Size: Inletoroutlet: Two1/4˝NPT (Female);Two1/8˝NPT
(Female) gaugeports.
Maximum Supply Pressure: 250psig(17.2bar).
Flow Capacity: 24SCFM(48m
3 /hr)at100psig(6.9bar).
Operating Temperature: 0to150°F(-18to60°C).
Materials: Body:Zinc;Bonnet: Acetal;Diaphragm/Seals: Nitrile;
Internals:Aluminum,brass,acetal,steel,musicwire(MPRisplatedwith
electrolessnickelforwateruse).
Weight: 4oz.(113g).
3/8
[9.65]
2-27/32
[71.88]
1-5/8
[41.40]
1-1/2
[38.10]
(2) 1/4 NPT
INLET & OUTLET
PORTS
(2) 1/8 NPT
GAGE PORTS
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.