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PRESSURE CONTROLS
PS08-30 Sequence, Internal Pilot & Drain
SYMBOLS
USASI/ISO:
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
PERFORMANCE (Cartridge Only)
PRESSURE DROP bar/psi
Pressure Drop vs. Flow
—— Max. Setting, 450–2400 psi Spring
- - - - Min. Setting, 50–300 psi Spring
32 cSt/150 sus oil at 40°C
20.7/300
19.0/275
17.2/250
15.5/225
13.8/200
12.1/175
10.3/150
8.6/125
6.9/100
➀ to ➁
5.2/75
3.4/50
➁ to ➂
1.7/25
PRESSURE DROP bar/psi
Pressure Drop vs. Flow
Max. Setting, 450–2400 psi Spring
32 cSt/150 sus oil at 40°C
193/2800
186/2700
179/2600
172/2500
166/2400
159/2300
152/2200
145/2100
138/2000
➀ to ➁
3.8
1
7.6
2
11.4
3
15.1
4
18.9
5
FLOW RATE lpm/gpm
22.7
6
3.8
1
7.6
2
11.4
3
15.1
4
18.9
5
FLOW RATE lpm/gpm
22.7
6
6.500.1
®
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®
HYDRAFORCE
PS08-30
DIMENSIONS
MATERIALS
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 highstrength
6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.008.1
TO ORDER
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
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
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
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.
®
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6.500.2