FCG series partially rotating worm gear box, mainly used for manual/pipe network/electric worm gear applications; The exterior design is exquisite and beautiful, using well-known brand bearings. The whole machine adopts O-ring and liquid sealant, providing comprehensive waterproof and dustproof protection; The shell material can be selected from ductile iron/cast steel/stainless steel, etc., widely used in ball valves/butterfly valves/plug valves.