keta hydraulic

Cartridge valve Directional Valves

Pilot-Operated Directional Valves: Direct Acting Check Valves Check Valves(Pilot Operated) Pilot-Operated Directional Valves 2-Way 3-Way 4-Way Shuttle Hot Oil Shuttle Pneumatic-operated Directional Valves Mechanically operated, back-to-back check valve

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A cartridge-style 3-way pilot-operated spool-type internal-vent directional valve

Technical Feature

OPERATION:
On no remote pilot signal at ① ,the valve allows flow from ③ to ④ , while flow is blocked at ② .On remote pilot signal at ①， the valve shifts to open from ③ to ②，while blocking flow at ④．Since ④ is common to the spring chamber, pressure on ④ will directly (1:1) affect the pilot pressure required, and must always be added to the bias spring value.
PerformanceCurves
Technical Data

Operating Pressure
250Bar

Flow

See PRESSURE DROP VS.FLOW graph.

Cavity

10-4

Filtration

Refer to "Cleanliness of Hydraulic Fluid"

Internal Leakage
82 cc/min. max. at 250 bar

Pilot Pressure Required
To Spool Crossover :
-4.1 bar (60psi) Spring:4.7 bar(68.2psi)
-7.6 bar(110psi) Spring: 7.6 bar(110psi)
To Full Spool Shift:
-4.1 bar (60psi) Spring: 5.2 bar (75psi)
-7.6 bar(110psi) Spring: 8.6 bar(125psi)

Temperature
-40°F to +250°F(-40°C to +120°C)

Fluids
Mineral-based fluids with viscosities of 7.4 to 420 cSt.

Body Material
6061-T6 aluminum alloy rated to 207bar, Steel & Ductile iron rated to 350bar
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PDF File

LPD-10-4
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