Durable Forged Brass Check Valve. 1.Material:brass body/stem,zinc/plastic handle. 2.Medium:water,oil,gas. 3.Certification:CE. Durable Forged ... above. Sealing PTFE/TEFLON,VITON,O-RINGS. Handle Iron handle,Stainless steel handle, Aluminium handle,Plastic handle.Connection Theaded ISO228,BSP,NPT,UNION.3.Technics ...