Piston valve 700-11

hydraulicpilotshut-off

Check valves witout/with pilot control These hydraulic check valves are part of the spring loaded shut-off valves. The check valves serve for blocking the supply line in the application of leak-free hydraulic cylinders in combination with low leaking directional valves. The flow B→A is permanently open. In the opposite direction A→B the flow is locked. It can be unlocked by pressurizing the control port Z. The minimum pressure for that depends on the pressure load at port A. The check valve with a capacity of 20 l/min is not equipped with a pilot control. The valve with a capacity of 50l/min is optional available without or with pilot control. In application with higher pressure and volume flow we recomment check valves with pilot control. The pilot control is effected by unlocking a seat valve in the main valve piston. Thereby a lesser control pressure is required to unlock the flow. By using a pilot control also clamping cylinders with unfavorable area ratio can be used. The pressure drop in the consumer line takes place gradually. This prevents from decompression shocks and preserves the connected hydraulic elements. By their design with manifold connection the check valves without/with pilot control facilitate fixtures without piping. Uncoupled machine parts eg. pallet systems can be kept pressurized by using these shut-off valves. Special features: space-saving installation options installation without piping pilot control prevents from decompression shocks allows pressure maintenance at uncoupled machine parts Important information: Faults can occur in the pressure ratio if the pressure load is too low to unlock the valve.