High Precision Regulator Products

High sensitivity, constant bleed and pressure control under varying flow, input pressure and temperature conditions.


Choose a high precision regulator product from the drop down menu or from the chart below to learn more:

WRA302 SeriesStandard High Precision Regulators
WRA102 SeriesStandard High Precision Regulators
WRA102BP SeriesHigh Precision Relief Valve
WRA171 SeriesHigh Precision Vacuum Regulator
WEA632 SeriesHigh Precision Filter/Regulator
WBA208 SeriesPrecision Pneumatic Input
Signal Amplifier
WBA45 SeriesPrecision Pneumatic Input
Signal Amplifier

WRA302 Series

Flows to 40 SCFM

W3RA302 Series - high precision regulator View Technical Bulletin

Catalog 604: Pneumatic Products -
Precision Regulators


  • Control sensitivity of .250" (.63 cm) water column variation allows use in precision applications.
  • A compensating diaphragm lets the regulator remain unaffected by supply pressure changes.
  • Flow of up to 40 SCFM with 100 PSIG supply allows use in applications with high flow requirements.
  • An aspirator tube compensates downstream pressure droop under flow conditions.
  • A separate Control Chamber isolates the diaphragm from the main flow to eliminate hunting and buzzing.
  • Unit construction lets you service the Regulator without removing it from the line.


Supply Pressure

250 PSIG, (17.0 bar), (1700 kPa) Maximum

Flow Capacity

40 SCFM (68 m3/HR) @ 100 PSIG, (7.0 bar),
(700 kPa) Supply and 20 PSIG, (1.5 bar),
(150 kPa) Setpoint

Exhaust Capacity

2.0 SCFM (3.4 m3/HR) where Downstream Pressure is 5 PSIG, (.35 bar), (35 kPa) above 20 PSIG, (1.5 bar), (150 kPa) Setpoint

Supply Pressure Effect

Less than 0.2 PSIG, (.014 bar), (.14 kPa) for 100 PSIG, (7.0 bar), (700 kPa) change in Supply Pressure


.250" (.010 PSIG) (.64 cm) Water Column

Ambient Temperature

-40°F to +200°F, (-40°C to 93°C)