Drilling & Production Equipment Plant of SPA offers 22 types gate valves matching with wellhead equipments. They include 3 series, PFFA, PFF, PFFY, with through-hole diameters of 52mm, 65mm, 80mm, 103mm. Now we are designing gate valve with super high pressure of 140Mpa. working temperature: - 29 ~ 121 ? working medium: mud,oil,natural gas(H2S) specification leve: PR1~PR2 standardized rank: PSL1~PSL4 material class: AA BB CC DD EE FF code of material: 45K 60K 75K