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An in-line-housed, double-pilot-operated, hydraulic check valve for use in blocking or load holding circuits.
The DCV12 allows flow from V ports to C ports, while normally blocking flow in the opposite direction. Flow will be allowed from C to V when pressure is applied to the opposite side V port.
The valve has a 4:1 pilot ratio, so at least one-fourth of the load pressure held at either C port is required at the opposite V port to open the flow passage.
The check is spring-biased at 1.7 bar (25 psi) to assure holding in static or no-load conditions. An optional sealed piston with check spring bias of 4.1 bar (60 psi) is available.
• Hardened seat for long life and low leakage.
• Check section serviceable as a cartridge.
• Optional cartridge thermal relief(s).
• Optional sealed piston.• Optional spring ranges.
• Low pressure drop.
Maximum Operating Pressure: 241 bar (3500 psi)
Flow: See Performance Chart
Internal Leakage Cx to Vx: 0.25 cc/minute (5 drops/minute) max. at 207 bar (3000 psi); Vx to Vx (without sealed piston): 328 cc/minute (20 cu. in./minute) max. at 240 bar (3500 psi)
Pilot Ratio: 4:1
Check Spring Bias: 1.7 bar (25 psi); with sealed piston option, 4.1 bar (60 psi)
Optional Thermal Relief Factory Setting: 348 ± 38 bar (5050 ± 550 psi)
Thermal Relief Reseat: 207 bar (3000 psi) minimum.
Operating Temperature: -40°C to 120°C (-40°F to 248°F) 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
Seal Kit (for CV12-2x): SK12-2x-T (2 required); See page 8.650.1
Pilot Piston Service Part Numbers:
O-Ring (1) – Buna 6001115, Fluorocarbon 6003115 Back-up (2) – Fluorocarbon 6011115 (all)
