PRESSURE CONTROLS
KS10-31 Kick-Down, Sequence, Internal Pilot
DESCRIPTION
A screw-in, cartridge-style, direct-acting, spool-type, hydraulic sequence valve with
internal pilot and spring chamber drain, designed to direct fl ow to a secondary circuit
once a pre-determined pressure level is attained in the primary circuit. The valve will
remain shifted until the pressure in the secondary circuit falls below a lower pressure
setting determined by a second spring.
OPERATION
In its steady state, the KS10-31 blocks fl ow at ➂, while allowing fl ow to pass from
➀ to ➁.
On attainment of a pre-determined pressure at
➀, the cartridge shifts to open ➁ to ➂.
FEATURES
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Optional spring ranges to 207 bar (3000 psi).
• Hardened spool and cage for long life.
• Industry common cavity.
RATINGS
Operating Pressure: 207 bar (3000 psi)
Flow: See Performance Chart
Internal Leakage
➀ to ➁: 115 cc/minute (7 cu. in./minute) max.
to 85% of nominal setting
Crack Pressure Defi ned: bar (psi) evident at
➀ when 0.95 lpm (0.25 gpm)
attained
➁ to ➂
Standard Spring Ranges (Primary Spring):
27.6 to 207 bar (400 to 3000 psi)
Standard Spring Setting (Optional Secondary Spring):
7 bar (100 psi); 10 bar (150 psi); 14 bar (200 psi); 17 bar (250 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: VC10-3; See page 9.110.1
Cavity Tool: CT10-3XX; See page 8.600.1
Seal Kit: SK10-3X-BB; See page 8.650.1
USASI/ISO:
PERFORMANCE (Cartridge Only)
SYMBOLS
6.812.1
6.9/100
3.4/50
10.3/150
13.8/200
17.2/250
3.8
1
7.5
2
FLOW RATE lpm/gpm
PRESSURE DROP bar/psi
11.4
3
15.1
4
18.9
5
Fully Open ➀ to ➁
32 cSt/150 ssu oil at 40°C
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TO ORDER
Cartridge: Weight: 0.27 kg. (0.60 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer
back-ups standard.
Anodized aluminum knobs
and caps.
Standard Ported Body: Weight:
0.36 kg. (0.80 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.010.1
DIMENSIONS
KS10-31
6.812.2
Primary Spring Setting
†
(Blank) for Adjustable, or
Specify in 100 psi
increments, for example:
9.0 900 psi
21.0 2100 psi
KS10-31__ - __ __ __ - __ - __ __ __/__ __ __
Secondary Spring
Setting
A 7 bar (100 psi)
B 10 bar (150 psi)
C 14 bar (200 psi)
D 17 bar (250 psi)
Primary Spring Range
30 27.6 to 207 bar
(400 to 3000 psi)
†
Adjustable valves will be preset to
approx. 50% of spring max. potential.
Adjustment Option
Factory Preset
Hidden Adjustment H
Porting
Cartridge Only 0
SAE 6 6T
SAE 8 8T
1/4 in. BSP* 2B
3/8 in. BSP* 3B
*BSP Body; U.K. Mfr. Only
Seals
Buna N (Std.) N
Fluorocarbon V
®
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MATERIALS
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