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- Products
HY-EHPR08-33 (Proportional Pressure Reducing/ Relief Valve)
A screw-in, cartridge-style, direct-acting, spool-type hydraulic pressure reducing/relieving valve, which can be infinitely adjusted across a prescribed range using a variable electric input. Pressure output is to DC current input. This valve is intended for use as a pressure limiting device in demanding applications.
Operation:
The HY-EHPR08-33 free flow ① to ③ when no current is applied to the coil. When the coil is energized, ② is connected to ①. Increasing current to the coil will increase the control (reduced) pressure proportional. If pressure at ① exceeds the setting induced by the coil, pressure from ① relieved to ③.
Note: back pressure on ③ becomes additive to the pressure setting at a 1:1 ratio.
Technical specification (for application beyond these parameters, please contact with us).
Technical specification (for application beyond these parameters, please contact with us)
|
Model |
HY-EHPR08-33 |
|
Installation position |
unlimited |
|
Storage temperature (℃) |
-20℃ to +55℃ |
|
Ambient temperature (℃) |
-20℃ to +50℃ |
Hydraulic specification
|
Max. inlet pressure |
207 Bar (3000 psi) |
|
Rated flow |
4.0 Lpm (1.05gpm),DP=6 bar (87psi), cartridge only, ① to ③,coil de-energized, |
|
Flow path |
Free flow: ① to ③ coil de-energized; Reducing: ② to ① coil energized; Relieving: ① to ③ coil energized. ① is not plumbed externally |
|
Hydraulic fluid |
Mineral oil, phosphate-ester |
|
Fluids |
7.4 ~ 420 cSt |
|
Temperature |
-40℃~+120℃, with NBR seals |
|
Cavity |
HY08-3, see page H.1.2 |
Electrical specification
|
Max. Control current |
12 VDC coils: 1.2 A 24 VDC coils: 0.6 A For other voltages, please consult factory |
|
Reducing/ relief pressure range (from zero to max. control current) |
0-26 bar (0 to 3750 psi) |
|
Hysteresis |
Less than 3% |
|
Dither frequency required |
200 Hz |
|
Step response |
T on <30 ms; T off <12 ms |