The Air-Lock pressure static device is composed of a Pneumatic pressure switch combined with 2 x 3 way valves ND 1/4” in a single body. is mounted on pneumatic actuators when they need to be isolated from control devices (for example positioners or electro-pneumatic distributors) in the event air pressure falls below the pre-determined operating safety point.
Air-Lock device consists mainly of a pneumatic pressure switch with an adjustable set point. This device synchronously drives the 2 x 3 way valves. The switching device operates immediately, even in the case of a gradual air-pressure decrease to the set value. The device will automatically reset after a failure when the line pressure is 1 bar greater than set pressure, to avoid instability around the device set point.

• Accurate pressure setting
• Insensitive to vibrations
• Reset hysteresis with established safety
• Set screw lockable with nut
• Synchronous drive for set pressure group + 2 x 3 way valve in one body
• Suitable for:
• Standard, offshore, sandstorm and copper-free ambient conditions
• Single and double acting actuator
• Low and high ambient temperature