Air Lock

AL Air Lock pressure static device is composed of a TP Pneumatic pressure switch with two CO 3 way valves (ND 1/4”) in a single body.

This product is mounted on pneumatic actuators when they need to be isolated from control devices (for example, positioners or electro-pneumatic distributors) in the event of air pressure drop, when it falls below the pre-determined operating safety point.

The switching device operates immediately, even in the case of a gradual air-pressure decrease. After the air failure event, the device will automatically reset when the suplly pressure will be 1 bar greater than the set pressure, avoiding instability around the device set point.


  • Accurate pressure setting
  • Insensitive to vibrations
  • Reset hysteresis with established safety
  • Set screw lockable with nut

Technical data

Operating pressure

2÷7 bar

(design pressure 10 bar)

Standard operating temperature

-20°C to 70°C

(lower or higher temperature on request)

Housing materials

Anodized aluminium

Stainless steel 316

CV max

Inlet = 1

Outlet = 1

Pilot signal connection

ND 1/8”

Output connections

 ND 1/4”

Contact us for more information