Product details Material: Body: steel Q235A Ball: stainless steel SS304 Stem: stainless steel 2Cr13 stem seal: FPM ball seal: carbon reinforced PTFE Handle: DN 10 - 150 galvanized steel DN 200 -250 plated steel DN 300 not with handles for ≥DN 200, we recommend using the manual gear operator operating conditions Temperature: -30 ° C - +200 ° C below 0 ° C, please contact us by fully welded valve body and carbon-reinforced Teflon gasket composition can be in frequent operation, long life operation under conditions of impurities and chemicals. Fine stainless steel grinding balls can guarantee many years openable and closable, reliable operation. Using float structure, slope to ensure flexibility seals pressed on the ball, even under pressure instability, the valve can guarantee tight. Leak-proof stem structure uses two "o" ring, so that the valve stem rotates freely and seal tightly. Features: no maintenance, adjustment and lubrication, easy to install, long-term reliable operation at low operating costs. The stem may be lengthened, easy insulation. Operating handle can be removed, commutation installation. Body without heavy and unreliable castings. Installation adjustment mechanism is very simple.