It can be sold with the following options:

1. 1/8 ", 1/4", 3/8", 1/2" NPT Female connections.
2. Voltages available are AC220V, DC24V, AC110V, AC24V, DC12V
3. U Shaped bracket required to attach valve to FRL
4. When the valve is installed into the pneumatic system and the pilot operator receives no signal the air is blocked at Port 1. When a pilot signal is received at pilot operator, the valve shifts , closing the connection between ports 2 and 3. At the same time, air flow begins between ports 1 and 2 at a slow rate controlled by the needle valve, located on the top of the valve. When the downstream pressure reaches approximately 50 % of the supply pressure, the main valve spool opens allowing full flow through the valve into the system. If the pilot signal or system pressure is lost, the valve returns to its initial state venting downstream pressure through Port 3.