PRESSURE CONTROLS

PS08-35 Sequence, External Pilot, Internal Drain

DESCRIPTION

A screw-in, cartridge-style, direct-acting, spool-type, hydraulic sequence valve with

external pilot and internal spring chamber drain.

OPERATION

In its steady state, the PS08-35 allows ﬂ ow from ➁ to ➂.

On attainment of a pre-determined pressure at

➀, the cartridge shifts to close ➁ to ➂.

Since the spring chamber is vented at

➂, back pressure at ➂ will directly (1:1) affect

the valve’s setting.

FEATURES

• Adjustments cannot be backed out of the valve.

• Adjustments prohibit springs from going solid.

• Optional spring ranges to 165.5 bar (2400 psi).

• Hardened spool and cage for long life.

• Compact size.

RATINGS

Operating Pressure: 240 bar (3500 psi)

Flow: See Performance Chart

Internal Leakage: 82 cc/minute (5 cu. in./minute) max. at full close

Standard Spring Ranges:

3.4 to 20.7 bar (50 to 300 psi);

6.9 to 41.4 bar (100 to 600 psi);

10.3 to 89.7 bar (150 to 1300 psi);

20.7 to 165.5 bar (300 to 2400 psi)

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: VC08-3; See page 9.108.1

Cavity Tool: CT08-3XX; See page 8.600.1

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

USASI: ISO:

PERFORMANCE (Cartridge Only)

SYMBOLS

6.660.1

9.3/125

10.3/150

6.9/100

5.2/75

3.4/50

1.7/25

3.8

7.6

11.4

15.1

FLOW lpm/gpm

PRESSURE DROP bar/psi

Fully Open ➁ to ➂

32 cSt/150 sus oil at 40°C

18.9

HYDRAFORCE

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TO ORDER

Cartridge: Weight: 0.25 kg. (0.55 lbs.)

Steel with hardened work surfaces.

Zinc-plated exposed surfaces.

Buna N O-rings and

back-ups

standard; Anodized aluminum

knobs.

Standard Ported Body: Weight:

0.27 kg. (0.60 lbs.) Anodized

high-strength 6061 T6 aluminum

alloy, rated to 207 bar (3000 psi).

Ductile iron bodies available;

dimensions may differ.

See page 8.008.1

DIMENSIONS

Setting in bar

†

(Blank) for Adjustable, or

Specify, for example:

M25 25 bar

M100 100 bar

Setting in psi

†

(Blank) for Adjustable, or

Specify, for example:

9.0 900 psi

23.5 2350 psi

Spring Range

3 3.4 to 20.7 bar

(50 to 300 psi)

6 6.9 to 41.4 bar

(100 to 600 psi)

13 10.3 to 89.7 bar

(150 to 1300 psi)

24 20.7 to 165.5 bar

(300 to 2400 psi)

Adjustment Option

1/4 in. Hex Allen Head A

1-1/2 in. Dia. Alum. Knob B

Option A w/Cover Cap C

Factory Preset Non-Adjst. F

Factory Preset

Hidden Adjustment H

(See page 6.003.1)

Option C

w/Lockwire Holes L

Seals

Buna N (Std.) N

Fluorocarbon V

PS08-35__ - __ __ __ - __ - __ __ / __ __ __ __

Porting

Cartridge Only 0

SAE 4 4T

SAE 6 6T

3/8 in. BSP* 3B

*BSP Body; U.K. Mfr. Only

PS08-35

†

Adjustable valves will be preset to

approx. 50% of spring max. potential.

6.660.2

HYDRAFORCE

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MATERIALS

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