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HPR251 High-Relief Pilot Operated Regulator

Features

Diaphragm design. Excellent pressure regulation and stability.

High relief characteristics up to 200 SCFM.

Balanced valve minimizes effect of pressure changes on inlet pressure.

Inline mounting.

3/4-14 NPTF exhaust port.

Self-relieving.

NPTF port threads; ISO G type (parallel) optional.

Integral pilot regulator porting.

1/4-18 NPTF auxiliary inlet pressure port.


Recomended Pilot (Control) Regulators 

     General Purpose: R56M-2, R350-2 or R67-2
     Precision: IR380-2, R57M-2 or an Electro-Pneumatic Servo Valve (ER-*)

Designed for systems that require high flow, high relief, and pressure regulation. This unit can be installed in an inaccessible location with a control regulator in an accessible location.

Note: See the HPR250 series for an HPR251 with integral control regulator.

Inlet Pressure Range: 10 PSIG (min) to 450 PSIG (max) (0.7 TO 31 bar)
Outlet PSI Range: 0-250 PSI (17.2 bar)
Operating Temp: 0°F TO 175°F (-18°C to 79°C) (Air moisture content must be dry)
Flow Rating: Flow rates exceed 2,000 SCFM
Body:
Cast aluminum
Dome: Cast aluminum
Cap: Teflon coated aluminum
Valve: Nitrile bonded aluminum
Elastomers: Nitrile
Ports: 2” or 1-1/2-NPTF
Gauge Ports: 1/4-NPTF
Exhaust Port: 3/4-NPTF

Catalog Pages

Service Kits and Other Literature

Service Kits & Maintenance Parts

Diaphragm Kit:
A251-71
...Includes diaphragm assembly & 2 o-ring seals

Valve Kits:
A251-81...Includes valve, stem, valve spring, washer, retaining ring & 2 o-ring seals

Seal Kit:
A251-91
...Includes all o-rings/seals and screen

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Product Configurator

Select the required* options below to generate a part number.
Part NumberDescriptionPrice
HPR251-12PILOT OPERATED REG 1-1/2$984.47
HPR251-12AREGULATOR$984.47
HPR251-12AGREGULATOR$1,003.45
HPR251-12AGWREGULATOR$1,003.45
HPR251-12AWREGULATOR$984.47
HPR251-12GREGULATOR$1,003.45
HPR251-12GWREGULATOR$1,003.45
HPR251-12WREGULATOR$984.47
HPR251-16PILOT OPERATED REG 2"$984.47
HPR251-16AREGULATOR$984.47
HPR251-16AGREGULATOR$1,003.45
HPR251-16AGWREGULATOR$1,003.45
HPR251-16AWREGULATOR$984.47
HPR251-16GREGULATOR$1,003.45
HPR251-16GWREGULATOR$1,003.45
HPR251-16WREGULATOR$984.47