Bronze Vertical Check Valve (Screwed) 1009 Salient Features Screwed Female Ends to IS 554 / BS 21 / ISO 7. Single Piece Design, Integral Seat. Meant for Vertical Lines Only. Permits flow in one direction and shuts automatically if the flow reverses. Spring Loaded and ‘O’ Ring Type. Also available with metal to metal seating. Test Pressure (Hydrostatic) Shell : 25 kg/cm²g (350 psig) Seat : 16 kg/cm²g (225 psig) Maximum Working Temperature 80°C