keta hydraulic

Cartridge valve Counterbalance Valves

Counterbalance(Standard): Counterbalance(Standard) Counterbalance(Semi-restrictive) Counterbalance(Restrictive) Counterbalance(4-port Vented) Counterbalance(Ultra-restrictive)

LCPCA

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Description

Acartridge-stylestandard capacity counterbalance valve with sealed pilot

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Technical Feature

OPERATION:
Counterbalance valves with pilot assist are meant for control on overrunning load. The
check valve allows free flow from port ② to port ① while a direct-acting, pilot-assisted
relief valve controls flow from port ① to port ② . Pilot assist at port ③ lowers the
effective setting of the relief valve at a rate determined by the pilot ratio.
FEATURES:
• Counterbalance valves should be set at least 1.3 times the maximum load induced
pressure.
• Backpressure at port ② adds to the effective relief setting at a ratio of 1 plus the pilot
ratio times the backpressure.
• Reseat exceeds 85% of set pressure when the valve is standard set. Setting lower
than the standard set pressure may result in lower reseat percentages.
• Factory pressure setting established at 30cc/min(2 in3/min).
PerformanceCurves
Technical Data

Operating Pressure
280bar

Flow

See PRESSURE DROP VS.FLOW graph.

Cavity

SUN T-11A

Filtration

Refer to "Cleanliness of Hydraulic Fluid"

Max.Recommended Load Pressure at Max.Setting
215bar

Internal Leakage
5 drops/min.

Pilot Ratio
3:1

Temperature
-40ºF to +250ºF(-40ºC to +120ºC)

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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