DADC10-40 Pilot Operated Check Valve

DESCRIPTION

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 .

OPERATION

The DADC10-40 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.

FEATURES

● Hardened seat for long life and low leakage.
● Low pressure drop.
● Optional thermal relief.

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℃～ 120℃（with Buna N seals）
Fluids:Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 ssu)

Cavity：