EHPR98-T38 Proportional Reducing/Relieving (EHPR98-T38)
A direct-acting, spool-type, drop-in-style, flange-mounted, pressure reducing/reliev-ing valve, which can be infinitely adjusted across a prescribed range using a variable electric input. Pressure output is proportional to DC current input. The E-coil is an integral part of the valve assembly, and cannot be replaced or field-serviced.
Product Operation
The EHPR98-T38 allows free flow from 1 to 3 when no current is applied to the coil. When the coil is energized, 2 is connected to 1. Increasing current applied to the coil will increase the control (reduced) pressure proportionally. If pressure at 1 exceeds the setting induced by the coil, pressure from 1 is relieved to 3.
Note: Back pressure on port 3 becomes additive to the pressure setting at a 1:1 ratio.
Note: Operation of manual override option: Rotate manual override screw clockwise until desired regulated pressure is achieved.
Product Features
• Economical drop-in style. • 1000-hour salt spray protection.
• Integral waterproof coil standard.
• Optional 142 micron screen at port 2.
Product Ratings
Pressure Rating: 241 bar (3500 psi)
Tank Port (3)
Pressure: 34.5 bar (500 psi) maximum; 17.2 bar (250 psi) maximum with manual override option.
Maximum Control Current: 1.38 amps for 10 VDC coil; 1.30 amps for 12 VDC coil;0.69 amps for 20 VDC coil; 0.65 amps for 24 VDC coil
Control Pressure at Maximum Control Current: 30 bar (435 psi)
Resistance: 4.3 ohm (10V); 5.2 ohm (12V); 17.5 ohm (20V); 20.9 ohm (24V)
Inductance: 80 mH (12V)
Hysteresis: at 100 Hz PWM: 5% of maximum control pressure
Flow Rating: 18.9 lpm (5.0 gpm)
Maximum Internal Leakage: De-engergized: 50 ml/min. (3 cu. in./min.) at 34.5 bar (500 psi); Energized at I-max: 100 ml/min. (6 cu. in./min.) at 34.5 bar (500 psi)
Temperature: -40° to 149°C (-40° to 300°F) with HNBR seals; -26° to 204°C(-15° to 400°F) with fluorocarbon seals
Ambient Air Temperature: -40° to 80°C (-40 to 176°F)
Environmental Rating: IP69K
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Mounting Screws: M4 x 0.7 x 12 Long; Part No. 4001015 (not provided with valve)
Cavity: VC-T011; See page 9.111.1
Cavity Tool: CT-T011R0-x-G; See page 8.600.1
Seal Kit: SK-T011; See page 8.650.1
