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EPFR50-S35

PRESSURE COMPENSATING ELEMENT WITH INTERNAL ORIFICE

Overview

Description

EPFR50-S35 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 2 and 3 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:
  • 0.15 kg (0.32 lb) Standard
  • 0.28 kg (0.62 lb) Tall adaptor
Internal wetted surface area:
  • 124 cm² (19.2 in²) Standard
  • 192 cm² (29.7 in²) Tall adaptor
EPFR50-S35_Perf1 EPFR50-S35_Perf2
EPFR50-S35_Dim
Cavity:
Cartridge installation torque:
  • 32.5 to 35.3 N-m (24 to 26 ft-lb)
Maximum allowable torque:
  • 67.8 N-m (50 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK10-S3N-MM BUNA N
  • SK10-S3V-MM Fluorocarbon
  • SK10-S3P-MM Polyurethane
EPFR50-S35_Order
POSITION
CODE
DESCRIPTION
EPFR50-S35C-H-J-R
C
Tall Cap
C
BLANK
Standard Cap
C
T
Tall Cap
H
Line Body
H
0
No Body
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
160
160 psi Bias Spring
R
230
230 psi Bias Spring