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Model:
Handle
The handle in a PFA 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. PFA 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 PFA 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 PFA lined plug valve work?
A PFA lined plug valve operates by rotating the valve plug for only a quarter turn. For the plug to make the quarter turn rotation, torque has to be applied on the handwheel or from the actuator. To start the valve, the handwheel is rotated for 90o degrees in the clockwise direction. This rotation from the handwheel is transmitted through the valve stem to the valve plug. This forces the plug to rotate for 90o degrees forcing its port to align straight to the valve port. As such, fluid starts flowing through the valve. To stop the valve, the handle is rotated in the counterclockwise direction for another quarter turn. This rotary motion is again transmitted to the valve plug via the stem. Due to this rotation, the plug rotates for 90o degrees becoming perpendicular to the valve port. This ensures the fluid is blocked and thus the valve is stopped.PFA lined plug valve manufacturer designs this valve so that by rotating the plug slightly by around 45o degrees, throttling flow can be achieved.
Applications of PFA lined plug valve
1. PFA lined plug valve is used in chemical processing plants.
2. They are used in the manufacturing of fertilizers.
3. PFA lined plug valves is used in food and beverage processing plants.
4. They are used in water supply and waste water treatment.
5. They are used in pharmaceutical manufacturing plants.
6. PFA lined plug valve is used in fluid diversion and mixing.
7. They are used in petrochemical industries.