Directional Valves

EPFR16-S35 — Logic Element and Flow Regulator
   Selection guide - similar valves.
   PDF file of this page.
   STP file for EPFR16-S35.
   Request a quote.

EPFR16-S35 Valve

SYMBOL:
EPFR16-S35 Valve symbol

DESCRIPTION
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.

OPERATION
The EPFR16-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 condition.

FEATURES
• Multiple function in a single cavity.
• Low bleed flow throughout the operating pressure range.
• Range of bias spring options; tall adaptor required for higher pressures.
   An extra tall adaptor is required for the 240 psi bias spring option.
• High system efficiency.
• Industry-common cavity.

RATINGS
Operating Pressure: Cartridge only: 241 bar (3500 psi);
   Aluminum housing: 207 bar (3000 psi); Ductile iron housing: 345 bar (5000 psi)
Flow: Up to 189.3 lpm (50 gpm)
Maximum Flow Loss: between 3 and 2: 0.95 lpm (0.25 gpm) at 241 bar (3500 psi)
Bias Springs: 6.2 bar (90 psi); 7.6 bar (110 psi); 11.0 bar (160 psi);
   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 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: VC16-S3; See page 9.116.1_3w
Cavity Tool: CT16-S3xx; See page 8.600.1
Seal Kit: SK16-S3x-MM; See page 8.650.1

 

 

PERFORMANCE:

EPFR16-S35 Valve Performance

 

EC56-43  Flow vs. Load
DIMENSIONS:
EC56-43 Valve Dimensions

MATERIALS:

Cartridge: Weight: 0.29 kg (0.64 lb) with
standard adaptor; 0.42 kg (0.92 lb) with tall
adaptor; 0.72 kg (1.59 lb) with extra tall
adaptor for 240 psi spring option. Steel with
hardened work surfaces. Zinc-plated exposed
surfaces. Buna N O-rings and polyester
elastomer back-ups standard.

Ported Body: Weight: 1.50 kg (3.3 lb)
Anodized high-strength 6061 T6 aluminum
alloy, rated to 207 bar (3000 psi).
See page 8.016.1_3w

ORDERING CHART:

EC56-43 Ordering