Asco 531 Series Spring Return Air Inert Gas Filtered Namur 3/2 5/2 Way Threaded 5/2 Way Aluminium 531 Series Spool Valve Asco Scg Series Bistable Function Moulded Ip65 Epoxy Moulded Environmentally-protected Construction Spool Valve Asco Ef Series Bistable Function Epoxy Moulded Intrinsically-safe Version Environmentally-protected Construction Spool Valve Asco 8531 Threaded Port Connection Namur Interface External Air Pilot Supply Vcefcm8531g401mo 24dc 531 Series Solenoid Valve ASCO G353A045 Pilot Operator Pulse Valve Sanitary Diaphragm Valve Manual Operator Solenoid Valve With Manual Operator ASCO Series 353 Solenoid Valve SCG353A051 ASCO 353 Series Valve ASCO Series 353 Pulse Valve