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.

API centrifugal pumps are mainly designed for general refinery service. It consists of a set of rotating vanes, enclosed within a housing or casing, used to impart energy to a fluid through centrifugal force. It operates using kinetic energy to move fluid utilizing an impeller and a circular pump casing.

API compressor is a mechanical device that increases the pressure of a gas by reducing its volume. It increases the pressure on a fluid and can transport the fluid through a pipe. As gases are compressible, the compressor also reduces the volume of a gas. There are many different types of compressors that include reciprocating, rotary, centrifugal, and axial types.