TANK VALVES: For air tanks, steel barrels, compressors, and other pneumatic containers where dependable automatic air valves are needed. Valves are equipped with standard valve core and sealing caps for operating pressures to 1.4MPa(200P.S.I). Flush Mount Valves-2 Piece (CH518 & SP518)/FMV518 , This valve is designed for Flush Mount φ16(.625") or φ11.5(.453") Valve Holes. High pressure valves valves for powder, water and foam extinguishers AIR-CONDITIONING SYSTEMS & REFRIGERATION VALVES 5V1 thread stansard valve series & 6V1/ M6x0.75 Thread valve series---brass or aluminium special quick couplers---R134a resistant