DF4-W series anti-interlock solenoid valve product features DF4-W anti-interlock valve is a special pneumatic component that controls the normal operation of press brakes and clutches. It ensures that the clutch and brake must maintain a certain combination and release sequence number, that is, when the press starts, the brake must first be released for 0.03 seconds. However, the clutch can only be combined; when the press stops, the clutch