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EPFR58-35

PRESSURE COMPENSATING ELEMENT WITH INTERNAL ORIFICE

Overview

Description

EPFR58-35 is a screw-in, cartridge style, bypass type pressure compensating element intended for use with remote fixed or variable orifice to provide a constant flow regardless of load pressure changes.

Operation

It is spring biased spool type valve provided with a small internal orifice between ports 2 and 3 so that the valve would bypass all flow to tank at bias spring pressure value plus pressure rise at no load flow demand. The orifice is pressure compensated to restrict flow loss through it at load flow demand.

Features

  • Multiple function in a single cavity.
  • Low bleed flow throughout the operating pressure range.
  • High system efficiency.
  • Industry-common cavity.
Pressure Ratings
Pressure rating:
  • 345 bar (5000 psi)
Flow Ratings
Flow rating:
  • See performance graph
Maximum flow loss:
  • 0.76 lpm (0.20 gpm) Between ports 3 and 2 at 345 bar (5000 psi)
Temperature Ratings
Operating fluid temperature:
  • -40 to 100 °C (-40 to 212 °F) With buna N seals
  • -26 to 204 °C (-15 to 400 °F) With fluorocarbon seals
  • -54 to 107 °C (-65 to 225 °F) With polyurethane seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 90 °C (-40 to 194 °F)
Fluids:
  • Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 20/18/14 per ISO 4406
Unit weight:
  • 0.1 kg (0.22 lb)
Internal wetted surface area:
  • 104 cm² (16.1 in²)
EPFR58-35_Perf1 EPFR58-35_Perf1
EPFR58-35_Dim
Cavity:
Cartridge installation torque:
  • 25.8 to 28.5 N-m (19 to 21 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK08-3N-MM BUNA N
  • SK08-3V-MM Fluorocarbon
  • SK08-3P-MM Polyurethane
EPFR58-35_Order
POSITION
CODE
DESCRIPTION
EPFR58-35-H-J-R
H
Line Body
H
0
No Body
H
4T
Aluminum SAE 4
H
6T
Aluminum SAE 6
H
6TD
Ductile Iron SAE 6
H
8TD
Ductile Iron SAE 8
H
3B
Aluminum BSPP 3/8" (3)
H
3BD
Ductile Iron BSPP 3/8" (3)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
J
U
PPDI Urethane
R
Spring
R
10
10 psi Bias Spring
R
40
40 psi Bias Spring
R
80
80 psi Bias Spring
R
110
110 psi Bias Spring
R
150
150 psi Bias Spring
R
250
250 psi Bias Spring