dn80 lever/ worm gear operation lug butterfly valve with iso

upvc butterfly valve a (worm gear type)/plastic butterfly valve

valve gear motor 12v 2.2rpm 2kg.cm 90 degree cw ccw limit sw

worm gear operated a216 wcb top entry ball valve

valve box forging

large size gear box a105 forging ball valve dn400

海外直订valves and valve gear mechanisms 阀门和气门齿轮机构

wzld api standard custom dn100 4 inch butt weld gas gate valve

coupling gear coupling valve plate steel material high accur