The working principle of the plug valve is to change the size and direction of the disc channel by rotating disc, thereby regulating and intercepting the fluid.
The main functions include flow regulation, fluid truncation, wide adaptability, good sealing and simple structure.
The plug valve is a closing part – plug rotates 90 degrees around the center line of the body to achieve the opening and closing, which used to cut off, distribute and change the medium flow direction on the pipeline.
Valve Overview
A plug valve is a shut off or plunger rotary valve that opens or closes by rotating 90 degrees to make the port on the plug connect with or separate from the port on the valve body. Pressure balance lubricated plug valve is a quick switch through valve. Movement between the sealing surface produces wiping effect, but when non-lubricated plug valve is in full open, It canprotection against contact with flowing media. This product is suitable for cutting and switching media, as well as diverging, and it can also be used for throttling due to the erosion resistance of the sealing surface.
Non-lubricated plug valve utilizes a tapered or cone-shape that acts as a plug and presses a polymeric sleeve against the body cavity. The use of the sleeve reduces friction between the plug mechanism and body.
These pressure balanced lubricated plug valves are often used to replace lubricated ones in applications where maintenance needs to be kept to a minimum, or where liquids could be trapped or solidify and potentially jam the valve.
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