bellow seal valves are normally installed in working conditions that have strict emission requirements. possible leakage arising from stem movement is eliminated by mounting a metal bellow between the bonnet and the stem. the bellow can follow the lineair movement of the stem easily, creating a stable and state of the art zero emission seal.
size: nps 1/2"~2"(dn15~dn50）
pressure rating: asme class 150~1500（pn16~pn260）
body material：carbon steel, stainless steel, alloy steel, duplex stainless steel
end connection：rf, bw, rtj,sw,npt
operation：manual, pneumatic, electric, hydraulic