# P 311 501 R

3/2 valve with mechanical spring.

Normally closed: pressure in port #1

Normally open: pressure in port #3

Can also be used as 2/2 valve. Unused port to be plugged.

Available in G1/8" and 1/8" NPT.


 Lockup Valve
   Fail in place lockup valve on instrument signal air failure.

Port sizes: 1/8" and 1/4" (G and NPT).

When the air supply pressure drops below the set point, the valve will shift causing the actuator to fail in place.

Set point: between 3 and 6 bars (44 to 87 psi).


# P 411 701 SR

4/2 valve with mechanical spring.

Available in G1/4" and 1/4" NPT.


Download spec sheet; page 66