PRESSURE CONTROLS

PS08-30 Sequence, Internal Pilot & Drain

DESCRIPTION

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

internal pilot and spring chamber drain, designed to direct oil to a secondary circuit

once a pre-determined pressure level is attained in the primary circuit.

OPERATION

In its steady state, the PS08-30 blocks ﬂ ow at ➀, while allowing ﬂ ow to pass from

➁ to ➂.

On attainment of a pre-determined pressure at

➀, the cartridge shifts to open ➀ to ➁.

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. to 90% of nominal setting

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);

31.0 to 165.5 bar (450 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-BB; See page 8.650.1

USASI/ISO:

PERFORMANCE (Cartridge Only)

6.500.1

20.7/300

19.0/275

17.2/250

15.5/225

7.6

3.8

15.1

11.4

FLOW RATE lpm/gpm

PRESSURE DROP bar/psi

22.7

18.9

13.8/200

12.1/175

10.3/150

8.6/125

6.9/100

5.2/75

3.4/50

1.7/25

—— Max. Setting, 450–2400 psi Spring

- - - - Min. Setting, 50–300 psi Spring

Pressure Drop vs. Flow

32 cSt/150 sus oil at 40°C

➀ to ➁

➁

to ➂

7.6

3.8

15.1

11.4

FLOW RATE lpm/gpm

PRESSURE DROP bar/psi

22.7

18.9

179/2600

186/2700

193/2800

172/2500

166/2400

159/2300

152/2200

145/2100

138/2000

Pressure Drop vs. Flow

Max. Setting, 450–2400 psi Spring

32 cSt/150 sus oil at 40°C

➀ to ➁

HYDRAFORCE

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SYMBOLS

Blue rectangles are links to other catalog pages.

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 31.0 to 165.5 bar

(450 to 2400 psi)

†

Adjustable valves will be preset to

approx. 50% of spring max. potential.

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

PS08-30__ - __ __ __ - __ - __ __ / __ __ __ __

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-Adj. F

Factory Preset

Hidden Adj. H

(See page 6.003.1)

Option C

w/Lockwire Holes L

DIMENSIONS

Porting

Cartridge Only 0

SAE 4 4T

SAE 6 6T

3/8 in. BSP* 3B

*BSP Body; U.K. Mfr. Only

Seals

Buna N (Std.) N

Fluorocarbon V

PS08-30

6.500.2

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MATERIALS

Blue rectangles are links to other catalog pages.