Non-Lubricated Plug Valve
Non-Lubricated Plug Valve
Kent Non-Lubricated Valves are robust in construction and easy to maintain in-line. These valves are sleeved quarter-turn plug valves that achieve sealing through the use of a compressible sleeve as a sealing member. In many applications, they operate virtually maintenance-free for decades. Sleeved plug valves are used for on/off and throttling service. These valves are used in a variety of industries, including petroleum, the chemical industry, pharmacy, chemical fertilizer, and the electric power industry. These valves are bi-directional flow, simple actuation, lightweight, compact design, and multiport configurations, all of which facilitate improved system design. The inert PTFE sleeve completely surrounds the plug. The sleeve provides a large, circumferential sealing surface from port to port. Open, closed, or rotating, the seal is assured. As the plug rotates, the 360° port lips provide a self-cleaning action to remove scaling and adhering media. Non-lubricant valves are used where less maintenance is required. The friction between the plug cone and body is reduced by sleeves. However, non-lubricated plug valves are limited by the temperature and chemical compatibility of their non-metallic materials. Non-lubricating valves are used to regulate the process fluid, such as sulfur, hydrogen fluoride, or where liquids could be trapped or solidified and potentially clog the valve.
Product Standards
Product Details
Special Features
Specifications | Details |
Design Standard | API-599, API-599, ASME B16.34 |
Pressure/Temperature Chart | ASME B16.34 |
Face to face Dimension | API-6D, ASME B16.10, |
Testing Standard | API 598 / BS EN 12266-1 |
Flange Details | ASME B16.5 UP TO 24″
DIN / BS / IS / JIS |
Butt Weld Ends | ASME B16.25 |
Socket Weld Ends | ASME B16.11 |
Screwed Ends | ASME B16.11 |
Size Range | 2″ – 24″ (DN50 – DN600) |
ASME Class | Class 150 & 300 |
Materials | WCB / LCB / LCC / CF8M / CF8 /CF3M / 4A / 6A |
Trims | F6a / F316 / F304 / F316L / F321 / F51 / F55 / Inconel |
Sleeve | PTFE, RPTFE |
Ends | Flange Ends, Butt-weld Ends, Screwed Ends, Socket Weld Ends. |
- Plug Valve design complies to API-599 & API-6D.
- Taper Plug Design – Lower operating torque compared to lubricated plug valves.
- Plug Adjustment Option – Enables online maintenance.
- Large PTFE Sleeve – Bubble-tight shutoff.
- No metal-to-metal contact.
- Longer service life.
- Bi-directional in-line bubble-tight seal independent of line pressure.
- Multiple external bubble-tight seals independent of line pressure.
- Direct mechanical three-point adjustment independent of line pressure.
- Independent travel stops.
- Full encapsulation and retention of all leading edges of PTFE sleeve and top seal components.
- Contoured waterway ensures minimum flow turbulence characteristic.
- No body cavities to entrap flow media.
- Positive flow direction indication.
- Fire safe by design and complies to API 607/ ISO 10497.
Catalogues
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