This valve adopts the build-in lead screw structure, the lead screw rotate but don't make shaft-orientation movement. The disc moves up and down along with the lead screw to open or shut off. It has a small bulk, efficient operation.

The valve's main material list:
Body: Gray iron, ductile iron or cast steel
Wedeg: Ductile iron + chemigum
Stem screw: Cooper alloy
Stem: Stainless steel
Gasket: Chemigum
Inner hexagonal bolt: Carbon steel
Bonnet: Gray iron, ductile iron or cast steel
O-ring: Chemigum
Thrust bearing: Copper alloy
Cover: Ductile iron or cast steel
Hexagonal bolt: Stainless steel or cast steel
Handwheel/lever: Gray steel or carbon steel

The valve has its DN varies from 50mm to 1000mm.