Directional Valves

EPFR52-S35 — Logic Element and Flow Regulator
   Selection guide - similar valves.
   PDF file of this page.
   STP file for EPFR52-S35
   Request a quote.

EPFR52-S35 Valve

EPFR52-S35 Valve symbol

A screw-in, cartridge-style, bypass-type, pressure-compensating element, with integral flow regulator for
load sense signal drain. The internal pressure-compensated flow regulator restricts the load signal bleed
flow in order to minimize system losses even at high operating pressures. The main compensator element
holds the valves primary flow constant regardless of load pressure changes.

The EPFR52-S35 is a spring-biased spool-type valve with an internal pressure-compensated flow regulator
between 2 and 3. When used as a pump unloading compensator, this valve will bypass flow to tank at
port 2 when system pressure reaches the load pressure plus the bias spring value. When the system
load is neutralized, the load signal is bled through the flow regulator bringing the valve to stand-by

• Multiple function in a single cavity.
• Low bleed flow throughout the operating pressure range.
• High system efficiency.
• Industry-common cavity.

Operating Pressure: Cartridge only: 345 bar (5000 psi) with polyurethane seals;
   Aluminum housing: 207 bar (3000 psi); Ductile iron housing: 345 bar (5000 psi)
Flow: Up to 151 lpm (40 gpm)
Maximum Flow Loss: between 3 and 2: 0.95 lpm (0.25 gpm) at 345 bar (5000 psi)
Bias Springs: 5.5 bar (80 psi); 6.9 bar (100 psi);
   11.0 bar (160 psi) Tall Cap Required; 16.5 bar (240 psi) Tall Cap Required
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with Fluorocarbon seals;
   -54° to 107°C (-65°F to 225°F) with Polyurethane seals
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
Installation: No restrictions; See page 9.020.1
Cavity: VC12-S3; See page 9.112.1_3w
Cavity Tool: CT12-S3xx; See page 8.600.1
Seal Kit: SK12-S3x-MM; See page 8.650.1


EPFR52-S35 Valve Performance

EPFR52-S35 Valve Dimensions


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.
See page 8.012.1_3w

EPFR52-S35 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for EPFR52-S35 Request a quote.