DIRECTIONAL VALVES

DESCRIPTION

A screw-in, cartridge-style, bypass-type, pressure-compensating element, with inte-

gral ﬂ ow regulator for load sense signal drain. The internal pressure-compensated

ﬂ ow regulator restricts the load signal bleed ﬂ ow in order to minimize system losses

even at high operating pressures. The main compensator element holds the valves

primary ﬂ ow constant regardless of load pressure changes.

OPERATION

The EPFR58-35 is a spring-biased spool-type valve with an internal pressure-com-

pensated ﬂ ow regulator between

➁ and ➂. When used as a pump unloading com-

pensator, this valve will bypass ﬂ ow to tank at port

➁ 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 ﬂ ow regulator bringing the valve to stand-by condition.

FEATURES

• Multiple function in a single cavity.

• Low bleed ﬂ ow throughout the operating pressure range.

• High system efﬁ ciency.

• Industry common cavity

RATINGS

Operating Pressure: Cartridge only: 345 bar (5000 psi);

Aluminum housing: 207 bar (3000 psi); Ductile iron housing: 345 bar (5000 psi).

Flow Rate: See Performance Chart

Maximum Flow Loss between

➂ and ➁: 0.95 lpm (0.25 gpm) at 345 bar (5000 psi)

Bias Springs:

Code 80 5.5 bar (80 psi)

Code 110 7.6 bar (110 psi)

Code 150 10.3 bar (150 psi)

Temperature: -40 to 120°C with standard Buna N 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: VC08-3; See page 9.108.1

Cavity Tool: CT08-3XX; See page 8.600.1

Seal Kit: SK08-3X-MM; See page 8.650.1

PERFORMANCE (Cartridge Only)

SYMBOL

4.460.1

HYDRAFORCE

.com

10.3/150

13.8/200

17.2/250

20.7/300

24.1/350

6.9/100

3.4/50

7.6

15.1

150 psi Spring

110 psi Spring

80 psi Spring

22.7

30.3

37.9

PRESSURE DROP bar/psi

FLOW lpm/gpm

Inlet Pressure vs. Bypass Flow

at No-Load Flow Demand

32 cSt/150 sus oil at 40nC

22.7/6

30.3/8

37.9/10

45.4/12

15.1/4

7.6/2

1000

138

2000

207

3000

276

4000

345

5000

FLOW lpm/gpm

PRESSURE bar/psi

Flow vs. Load Pressure

32 cSt/150 sus oil at 40nC

EPFR58-35 Pressure Compensator with Internal

Blue rectangles are links to other catalog pages.

EPFR58-35 - __ __ __ - __ - __ __ __ __

Cartridge: Weight: 0.11 kg. (0.25 lbs.)

Steel with hardened work surfaces.

Zinc-plated exposed surfaces.

Buna N O-rings and back-ups

standard.

Ported Body: Weight: 0.64 kg.

(1.4 lbs.) Ductile Iron (code "D")

standard, dimensions may differ

from illustration; rated to 345 bar

(5000 psi). See page 8.008.1

Ported Body: Weight: 0.36 kg.

(0.80 lbs.) Anodized high-strength

6061 T6 aluminum alloy, rated to

207 bar (3000 psi).

See page 8.008.1

DIMENSIONS

MATERIALS TO ORDER

Porting

Cartridge Only 0

SAE 6 (Ductile) 6TD

SAE 6 (Alum.) 6T

Bias Spring

80 5.5 bar (80 psi)

110 7.6 bar (110 psi)

150 10.3 bar (150 psi)

EPFR58-35

4.460.2

Seals

Buna N (Std.) N

Fluorocarbon V

Polyurethane P

Note: Aluminum body

rated for 207 bar

(3000 psi) max.

HYDRAFORCE

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Load-Sense Drain Flow Control

Blue rectangles are links to other catalog pages.