2/2 NC, External Pilot, Return
3/2 NC, External Pilot, Pilot, Pneumatic Spring, Spring Return
2/2 NC, Pneumatic, Spring Return
2/2 Check Valve, Pneumatic, Return
2/2 NC, Bi Direction, Pneumatic, Return
3/2 NC, Pneumatic, Pneumatic Spring, Spring Return
3/2 NC, Pneumatic, Spring Return
2/2 NC, Pilot, Spring Return, Manual Override
2/2 NC, Pilot, Spring Return, Manual Override