... Anti-static device for dual grounding of the ball, stem and bodyTwo sets of O-rings plus firesafe stem packing preventing leakageCorrosion ... -blowout trunnion stem design. We can do the OEM. We can make the material for cast iron, cast steel, stainless ... ANSI, DIN, BS, JIS, with different specification, too. The specifications can be designed and satisfied for customers' special requirementsKey ...