Plug Valves Β· Sleeved Plug Valves
Non-Lubricated Sleeved Plug Valve
The non-lubricated sleeved plug valve is the PTFE-sleeved execution of the plug valve family: the tapered plug turns inside a resilient fluoropolymer sleeve that carries the seal, so no grease injection or periodic lubrication is needed. The benchmark execution spans DN15 to DN350 at Class 150 to 900 and PN16 to 63, with WCB/CF8/CF8M/CF3/CF3M/LCB/WC6 body and bonnet options, A105+ENP or stainless plug, and PTFE or PPL seats.
Part of the Sleeved Plug Valves family
Last updated: 2026-11
Specifications
| body materials | WCB, CF8, CF8M, CF3, CF3M, LCB, WC6 |
|---|---|
| body materials | WCB, CF8, CF8M, CF3, CF3M, LCB, WC6 |
| plug materials | A105+ENP, SS304, SS304L, SS316, SS316L |
| seat materials | PTFE, PPL |
| seat ring materials | PTFE, PPL |
| packing materials | Graphite, PTFE, PPL |
| gasket materials | SS304+Graphite |
| size range | DN15 to DN350 |
| pressure class | Class150 to Class900, PN16 to PN63 |
| end connections | ASME B16.5 |
| end connections | ASME B16.11 |
| end connections | ASME B16.25 |
| end connections | ANSI, ASME B1.20.1 |
| inspection test | API 598, API 6D |
Application & selection guidance
Select this execution where a lubricated plug valve would demand a grease schedule the line cannot carry - or where injected lubricant would contaminate the medium. Pick body and plug materials against the medium (LCB/WC6 for low and high temperature service, CF3M for corrosive duty), confirm the class rating, and match the end connection - flanged, socket weld, butt weld or screwed, each to its stated ASME/ANSI standard.
Frequently asked questions
How does a non-lubricated sleeved plug valve seal without grease?
The plug turns against a PTFE or PPL sleeve and seat set that provides the sealing surface, so sealing does not depend on injected lubricant - the benchmark page lists seat, seat ring, packing and gasket across PTFE, PPL, graphite and SS304+graphite with no lubrication line in the duty.
Which body materials and ratings does the execution cover?
The benchmark page lists body and bonnet in WCB, CF8, CF8M, CF3, CF3M, LCB and WC6, with plug in A105+ENP or SS304/304L/316/316L, sized DN15 to DN350 at Class 150 to Class 900 and PN16 to PN63.
What end connections are available?
The benchmark page declares flanged ends to ASME B16.5, socket weld ends to ASME B16.11, butt weld ends to ASME B16.25 and screwed ends to ANSI/ASME B1.20.1, with inspection and test to API 598 and API 6D.
Ordering & documentation
Documents
Ask for the documentation set you need with the inquiry β typical items for this execution (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
A quotation-ready inquiry states: nominal size and pressure rating, body and seat material preference, end connection, operation, and the service medium with temperature. Typical values on this page are benchmark reference ranges; the binding values are confirmed at quotation.
Sample & supply
Supply terms, order quantities and lead time are agreed per order β state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, keep end-face protectors on until installation, and for elastomer- or PTFE-seated executions avoid prolonged outdoor storage β seat compounds age fastest in direct sunlight and freezing conditions.
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