Description
Flow is allowed to pass in one direction (A to A1 or B to B1), then the valve remains closed (checked) in both reverse directions (A1 to A or B1 to B) in order to hold and lock in position the cylinder or other actuators; reverse flow is possible only when sufficient pilot pressure is applied at A or B, which act as cross connected pilot ports, and the pilot piston lifts the poppet from its seat overcoming cylinder port pressure.
In case of valve application in redundancy systems it is especially recommended to use version with sealed pilot piston.
Note: for applications outside these parameters, please consult us.
