Handle 

The handle in a PTFE lined plug valve is the part where one applies torque to open or close fluid flow. The handle is used in manually operated valves. For an automatic valve, an actuator is used. The actuator is tasked with providing the torque that the valve needs to open or close the fluid flow. 

Stem 

This is the component that transmits the torque applied on the handle by the operator to the plug. PTFE lined plug valve manufacturer design the stem with threads that help the stem to rotate.

Plug 

The plug is the component that helps to open or close the fluid flow. It gets the power to operate from the valve stem. It is connected to the stem through its top end. The plug has a port or more than one port which when aligned with the valve ports allows fluid to flow through the valve. 

Valve body 

The valve body is used to house internal parts of the PTFE lined plug valve such as the plug and seat. This component is usually made of very strong metallic materials such as carbon steel and stainless steel among others. This ensures the valve body remains very strong against high pressure as well as impact damage. The valve body also contains the inlet and exit ports of the valve that are connected to the pipeline. 

Body cover 

The body cover is placed on top of the valve body and as the name suggests, it helps to cover the body’s top part to prevent any fluid leakage. It is through the body cover that the valve can be opened for inspection and cleaning while it is still connected to the pipe. The body cover and valve body are made of the same metallic material. 

Gaskets 

These components are used to prevent fluid leakage between the body cover and the valve body as well as between the pipe and the valve body connection. Bolts and nuts as well as screw threads are used to tighten the connection where the gasket is mounted. 

How does a PTFE lined plug valve work?

PTFE lined plug valve manufacturer designs this valve so that by rotating the plug slightly by around 45o degrees, throttling flow can be achieved.
 

PTFE lined plug valve classfication

This is a PTFE lined plug valve with three ports. This type of valve is used in various applications that involve fluid mixing and fluid diversion. For fluid mixing, the fluid streams from two valve ports are mixed inside the valve body. After mixing, the fluid leaves the valve via the exit port as one fluid stream. When used to divert fluid flow, one fluid stream enters the valve and its direction of flow is changed inside the valve body to an angle of 90o degrees. This type of valve is very economical since it can serve the functions of three or two gate valves thus reducing the cost of the piping system. 

Electric PTFE lined plug valve 

This is the type of PTFE lined plug valve that is operated by use of an electric actuator. This type of actuator uses electricity to operate. The actuator is placed on top of the body cover. The actuator is connected to the valve stem to help transmit power to the valve plug. The actuator has an electric motor that converts electrical energy to mechanical energy. This type of valve is very versatile as it can work in all areas of valve applications provided there is electricity. The valve is also automated such that it can open and close the fluid flow independently of a valve operator. 

Pneumatic PTFE lined plug valve 

This is the type of PTFE lined plug valve operated by use of a pneumatic actuator. This actuator operates by use of compressed gas/air. The actuator consists of one or two chambers where compression of air takes place. The compressed air acts on a piston. This forces the piston to rotate creating mechanical energy. This mechanical energy (torque) is used to operate the valve stem and thus the valve plug. PTFE lined plug valve manufacturers recommend use of this valve in applications that have high demands of hygiene like foods and pharmaceuticals since the compressed air/gas used can be filtered. As such, it helps remove any impurities that may cause contamination to the product being manufactured. 

Applications of PTFE lined plug valve