FLOW CONTROLS

EC12-34 Pressure Compensator, Load Holding

USASI/ISO:

PERFORMANCE (Cartridge Only)

SYMBOL

5.434.1

Flow Maintenance

with 200 psi Spring, Meter-Out mode

32 cST/150 sus oil at 40°C

18.9/5

37.9/10

56.8/15

94.6/25

75.7/20

FLOW lpm/gpm

34.5

500

PRESSURE DROP bar/psi

240

3500

172

2500

103

1500

DESCRIPTION

A screw-in, cartridge-style, load sense, ﬂ ow-on-demand pressure-compensator with

built-in damping and load-holding features for use in gravity-lowering circuits.

OPERATION

The EC12-34 is designed to be used in combination with a ﬂ ow control valve for

lowering and holding a load. With inlet ﬂ ow at port

➁, port ➂ will deliver required ﬂ ow

regardless of load pressure at

➁. Port ➀ of the compensator must be connected to

the outlet of a ﬂ ow control valve that is connnected to the tank.

FEATURES

• Hardened parts for long life.

• Hardened seat for low-leakage load-holding capability.

• Quiet, modulated response.

• Industry common cavity.

RATINGS

Operating Pressure: Inlet: 241 bar (3500 psi)

Maximum Regulated Flow: 83 lpm (22 gpm) with 200 psi compensating spring

Flow Maintenance: See performance chart

Leakage:

➁ to ➀ at 241 bar (3500 psi): 5 drops per minute when external

metering oriﬁ ce is closed; 160 ml (10 cu. in.) per minute when external

metering oriﬁ ce is open.

Temperature: -40 to 120°C with 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: VC12-3; See page 9.112.1

Cavity Tool: CT12-3XX; See page 8.600.1

Seal Kit: SK12-3X-MM; See page 8.650.1

U.S. Patent

7,261,030

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DIMENSIONS

EC12-34

5.434.2

1.76

44.6

TORQUE:

33–37 ft-lbs

45–50 Nm

2.89

73.4

Cartridge: Weight: 0.43 kg. (0.95 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

EC12-34 - __ __ __ - __ - 200

Seals

N Buna N (Std.)

V Fluorocarbon

Compensator Spring

200 13.8 bar (200 psid)

Porting

Cartridge Only 0

SAE 8 8T

SAE 10 10T

SAE 12 12T

1/2 in. BSP* 4B

3/4 in. BSP* 6B

*BSP Body; U.K. Mfr. Only

U.S. Patent No. 7,261,030

HYDRAFORCE

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Blue rectangles are links to other catalog pages.