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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.

Ratings

Pressure Ratings
Pressure rating
345 bar (5000 psi)
Flow Ratings
Flow rating
See performance graph
Maximum internal leakage
0.6 lpm (0.15 gpm) Between ports 2 and 3 at 345 bar (5000 psi)
Temperature Ratings
Maximum 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)

Operating Parameters

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

Properties

Cartridge 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

Performance

EPFR50-S35_Perf_Chrt

Dimensions

EPFR50-S35_Dim_Dwg

Materials

Materials

Cartridge: Weight: 0.15 kg (0.32 lb) with short cap; 0.28 kg (0.62 lb) with tall cap. Steel with hardened work surfaces. Zinc-plated exposed surfaces. Buna N O-rings and polyester elastomer back-ups standard.

Ported Body : Weight: 0.32 kg (0.70 lb) Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi). Ductile iron (8TD) bodies are available for pressures up to 350 bar (5000 psi); Weight and dimensions may differ.

Installation Specifications

Cavity
VC10-S3
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

Accessories

Seal kit
SK10-S3X-MM X = seal option

Order code

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
EPFR50-S35_Order