API 6D Lubricated Plug Valve Manufacturers

Lubricated plug valve consists of a plug, which is drilled from the top of integral shaft along its centerline and radially from the cylindrical seating surface. A sealant injection fitting screwed into the hole at the top of the plug is used with a sealant gun to inject sealant down the center of the plug, out the radial holes. The lubricated valve provides tight shutoff of hard-to-handle fluids. The plug is designed with grooves, which retain a lubricant to seal and lubricate the valve and provide a hydraulic jacking force to lift the plug within the body, thereby reducing force required for rotary operation. It is a valve in which the seat seal depends on the presence of a sealing compound between the plug and the valve body. This valve is particularly suitable for abrasive fluids. This valve is considered as high-maintenance valves to be used for infrequent operation.