What is a lubricated plug valve and how does it work?

A lubricated plug valve uses a tapered plug rotating inside the valve body to open or close the flow path. A special sealant injected under pressure into grooves around the plug creates multiple seals, ensuring bubble-tight shut-off, reduced friction, and protection of internals from corrosive or abrasive media.

What patterns and sizes of lubricated plug valves does SHIELD offer?

SHIELD Lubricated Plug Valves are available in Short Pattern, Regular Pattern and Venturi Pattern, with sizes from 1/2" to 24" (DN15 - DN600), pressure ratings from Class 150 to Class 2500, and body materials including carbon steel (WCB), stainless steel and alloy steel.

Can lubricated plug valves handle high pressure?

Yes. SHIELD lubricated plug valves are rated from Class 150 up to Class 2500 and are available with a pressure balance inverted lubricated design that equalizes pressure between plug and body chambers, making them suitable for pulsating or static high-pressure services.

Which industries use lubricated plug valves?

Lubricated plug valves are widely used in oil & gas, chemical processing, petrochemical, power generation and water treatment industries for wellhead isolation, manifolds, pipelines, sludge control and auxiliary services where reliable bubble-tight shut-off is critical.

Does SHIELD provide custom lubricated plug valve solutions?

Yes. SHIELD can provide custom designs and modifications including special materials, actuation options (manual lever, gear, electric, pneumatic, hydraulic), multi-port configurations and specific sealant systems to meet particular application requirements.

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