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EPFR52-S35

PRESSURE COMPENSATING ELEMENT WITH INTERNAL ORIFICE

Overview

Description

EPFR52-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

The EPFR52-S35 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
151 lpm (40 gpm)
Maximum internal leakage
0.6 lpm (0.15 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)

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

Unit weight
0.28 kg (0.61 lb) Standard
0.44 kg (0.97 lb) Tall adaptor
Internal wetted surface area
208 cm² (32.2 in²) Standard
267 cm² (41.4 in²) Tall adaptor

Performance

EPFR52-S35_Perf_Chrt

Dimensions

EPFR52-S35_Dim_Dwg

Materials

Materials

Cartridge: Weight: 0.30 kg. (0.65 lbs.) with short cap; 0.45 kg. (1.0 lbs.) 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: 1.13 kg. (2.5 lbs.) Anodized high strength 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
VC12-S3
Cartridge installation torque
44.7 to 50.2 N-m (33 to 37 ft-lb)
Orientation restriction
None

Accessories

Seal kit
SK12-S3X-MM X = seal option

Order Code

POSITION
CODE
DESCRIPTION
EPFR52-S35C-H-J-R
C
Tall Cap
C
BLANK
Standard Cap
C
T
Tall Cap
H
Line Body
H
0
No Body
H
12T
Aluminum SAE 12
H
12TD
Ductile Iron SAE 12
H
6BD
Ductile Iron BSPP 3/4" (6)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
J
U
PPDI Urethane
R
Spring
R
80
80 psi Bias Spring
R
100
100 psi Bias Spring
R
160
160 psi Bias Spring
R
240
240 psi Bias Spring
EPFR52-S35_Order