DIRECTIONAL VALVES

EP12-S35 Piloted Spool-Type Logic Element

DESCRIPTION

A spool-type, screw-in, cartridge-style, hydraulic directional element, with multi-

function potential when used with other directional, pressure, or ﬂ ow control devices.

OPERATION

The EP12-S35 is a spring-biased blocking valve which will shift to allow full ﬂ ow from

➀ to ➁ only when pressure at ➀ exceeds the cumulative pressure of ➂, plus the bias

spring pressure value.

EP10-S35 is a pilot-to-close directional valve.

With no pressure at

➂, ﬂ ow will be allowed from ➀ to ➁ once the bias spring force is

overcome with pressure at

➀.

FEATURES

• Multiple function/application potential.

• Low pressure drop.

• Industry common cavity.

• Manual override option available with 80 psi spring only.

RATINGS

Operating Pressure: 350 bar (5000 psi) cartridge; 207 bar (3000 psi) standard

aluminum housing

Flow: See Performance Chart

Internal Leakage: 131 cc/minute (8 cu. in./minute) max. at 350 bar (5000 psi)

Bias Spring Pressure Options:

0.7 bar (10 psi)

5.5 bar (80 psi)

7.0 bar (100 psi)

11.0 bar (160 psi) Tall Cap option required

16.5 bar (240 psi) Tall Cap option required

Temperature: -40 to 120°C with standard Buna 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

Cavity Tool: CT12-S3xx; See page 8.600.1

Seal Kit: SK12-S3x-MM; See page 8.650.1

USASI:

PERFORMANCE (Cartridge Only)

SYMBOLS

4.501.1

ISO:

5.5/80

4.1/60

37.8

75.7

FLOW lpm/gpm

PRESSURE DROP bar/psi

113.5

151.4

2.8/40

1.4/20

~ to  (fully open)

32 cSt/150 ssu oil at 40nC

HYDRAFORCE

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Blue rectangles are links to other catalog pages.

DIMENSIONS

Cartridge: Weight: 0.23 kg. (0.5 lbs.)

Steel with hardened work surfaces.

Zinc-plated exposed surfaces.

Buna N O-rings and polyester

elastomer back-ups standard.

Standard Ported Body: Weight:

1.13 kg. (2.5 lbs.) Anodized high-

strength 6061 T6 aluminum alloy,

rated to 207 bar (3000 psi). Ductile

iron bodies available; dimensions

may differ. See page 8.012.1.

MATERIALS TO ORDER

EP12-S35

4.501.2

1.98

50.3

2.00

50.8

0.97

24.5

3.25

82.6

4.00

101.6

0.19

4.8

3.62

91.9

0.34

8.6

1.76

44.7

4.00

101.6

ORIFICE DISCS SHOULD NOT

BE USED WITH THIS PRODUCT.

1.25

31.8

2.21

56.1

1.92

48.8

Max.

1.04

26.4

2.44

62.0

INCH

MILLIMETRE

ACROSS

FLATS

TALL CAP

OPTION "T"

MANUAL OVERRIDE

OPTION "M"

TORQUE–

30 ft-lbs

(40.6 Nm) Max.

EP12-S35__ - __ __ __ - __ - __ __

Bias Spring

10 0.7 bar (10 psi)

80 5.5 bar (80 psi)

100 7 bar (100 psi)

‡

160 11 bar (160 psi)

‡

240 16.5 bar (240 psi)

Porting

Cartridge Only 0

SAE 12* 12T

*SAE 6 pilot port

Option

None

(Blank)

Tall Cap T

Manual Override M

‡ T Option required

Seals

N Buna N (Std.)

V Fluorocarbon

P Polyurethane

(for pressures over

240 bar/3500 psi)

Manual Override available

with 80 psi spring only.

HYDRAFORCE

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Blue rectangles are links to other catalog pages.