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EHPR08-33 Proportional Reducing/Relieving Valve (EHPR08-33)

A screw-in, cartridge-style, direct acting, spool-type reducing/relieving valve, which can be infi nitely adjusted across a prescribed range using a variable electric input. Pressure output is proportional to DC current input. This valve is intended for use as a pressure control device in demanding applications.

Product Operation

The EHPR08-33 allows free flow from ➀ to ➂ when no current is applied to the coil. When the coil is energized, ➁ is connected to ➀. Increasing current applied to the coil will increase the control (reduced) pressure proportionally. If pressure at ➀ exceeds the setting induced by the coil, pressure from ➀ is relieved to ➂Note: Back pressure on port ➂ becomes additive to the pressure setting at a 1:1 ratio.

Product Features

 12 and 24 volt coils standard.
 Optional manual override.
 Industry common cavity.
 Optional waterproof E-coils rated up to IP69K.

Product Ratings

Maximum Inlet Pressure at port 
207 bar (3000 psi)
Maximum Tank Pressure at port 
34.5 bar (500 psi)
Maximum Control Current: 1.2 amps for 12 VDC coil; 0.6 amps for 24 VDC coil; For other voltages, consult factory
Dither Frequency Required: 200 Hz
Typical Frequency Response: See Section 10
Hysteresis: Less than 3%
Reducing/Relieving Pressure Range from Zero to Maximum Control Current: 0–26 bar (0–375 psi)
Rated Flow: 4.0 lpm (1.05 gpm), ΔP=6 bar (87 psi), Cartridge only,➀ to ➂ coil de-energized
Step Response: TON

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