DC10-40 Pilot Operated Check Valve (DC10-40)
A dual pilot operated check valve for use in blocking or load-holding circuits. This valve has an optional thermal relief from port 4 to port 3.
Product Operation
The DC10-40 will block flow from 1 to 2, and from 4 to 3. Flow is allowed in the opposite direction when pressure is applied to port 2 and/or port 3.
The valve has a 3:1 pilot ratio, so at least 1/3 of the load pressure at port 1 or 4 is required at the pilot lines (ports 2 or 3) to open the flow passage to allow flow from ports 1 or 4.
The check is spring-biased at 25 psi to assure holding in a static or no load condition.
Note: Orifice disc cannot be used with this product.
Product Features
• Hardened seat for long life and low leakage.
• Low pressure drop.
• Optional thermal relief.
Product Ratings
Operating Pressure: Inlet: 240 bar (3500 psi)
Flow: Rated Inlet Flow: 30.3 lpm (8 gpm); See performance chart.
Pilot Ratio: 3:1
Check Spring Bias: 1.7 bar (25 psi)
Thermal Relief Crack Pressure Range: 310 to 386 bar (4500 to 5600 psi)
Thermal Relief Valve Leakage: 5 drops per minute (0.25 ml per minute) at up to 85% of crack pressure.
Maximum Check Valve Leakage: 5 drops per minute (0.25 ml per minute) at 240 bar (3500 psi).
Temperature: –40 to 120°C with Buna N 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: VC10-4; See page 9.110.1
Cavity Tool: CT10-4XX-X-X; See page 8.600.1
Seal Kit: SK10-4X-MMM; See page 8.650.1
