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Lubricated Inverted Gas Plug Valve


  • Port size:DN15-DN600;1/2''-24''
  • Pressure:150LB-2500LB
  • Medium:Water,steam,oil,gas
  • Temperature :-20~180ºC,-46~450ºC
  • Body material:Carbon Steel, Stainless Steel,forged steel
  • Description:China lubricated & non-lubricated plug valve manufacturer,factory and supplier.

Lubricated Inverted gas plug valve is a Quarter-turn rotary motion Valve that uses a tapered or cylindrical plug to stop or start the flow. The disk is in plug shape, which has a passage to pass the flow.Lubricated Inverted gas plug valve is used in place of a gate valve where the quick operation is required. Lubricated Inverted gas plug valve can be used in high-pressure temperature services.

In the open position, this bored passage is in line with the flow. When the plug is turned 90° from the open position, the solid part of the plug blocks the flow.

The plug inside a Lubricated Inverted gas plug valve has a cavity in the middle along its axis. You can see this in the image. Lubricant chamber at the bottom and the sealant injection fitting at the top ensure the supply of lubricant.

The small check valve below the injection fitting prevents the sealant from flowing in the reverse direction once the sealant is injected into the cavity.

Plug surface gets constantly lubricated by the sealant that moves from the center cavity through radial holes into lubricant grooves on the plug surface. Now why we required all this? Many plug valves are of all-metal construction.

The narrow gap around the plug may allow leakage, and if you reduce the gap further, it will increase the friction and plug may get stuck inside the valve body.

Lubricated inverted gas plug valve technical Specification

Design & manufacturer API599, API6D
Nominal diameter 1/2'' ~ 24''( 15mm ~ 600mm)
Pressure class Class 150 ~ Class 1500
Length of face to face ASME B16.10
Flange end ASME B16.5
Test & inspection API598, API6D
Operation model Handle wheel, worm gear, pneumatic and electric actuated

Lubricated inverted gas plug valve main parts material

NO Part Name Material
1 Body ASTM A216-WCB A 217-WC1,WC6,WC9,C5, ASTM A351-CF8,CF8M,CF3,CF3M
2 Plug ASTM A182-Gr.F6a ASTM A182-F22 ASTM A 217-WC1,WC6,WC9,C5, ASTM A351-CF8,CF8M,CF3,CF3M
3 Gasket Flexible graphite+stainless steel
4 Cover ASTM A216-WCB A 217-WC1,WC6,WC9,C5, ASTM A351-CF8,CF8M,CF3,CF3M
5 Bolt ASTM A193-B7,A193-B8,A193-B8M
6 Nut ASTM A194-2H,A194-8,A194-8M
7 Packing Flexible graphite+304
8 Gland ASTM A216-WCB A 217-WC1,WC6,WC9,C5, ASTM A351-CF8,CF8M,CF3,CF3M
9 Wrench ASTM A216-WCB, ASTM A351-CF8,CF8M,CF3,CF3M
10 Yoke nut ZQA 19-4
11 Hand wheel ASTM A536 Gr.60-40-18 ,ASTM A216-WCB