China plug valve manufacturer,factory and supplier-Plug valves

General Plug Valve

China general plug valve manufacturer, factory and supplier for General valve twin seal plug valve, Orbit plug valve, DBB Twin seal orbit general Valve, General plug valve full bore and reduced bore, API General valve,Dual expanding general plug valve and other general plug valves.

In the general plug valve's opening/closing process, there is no contact between the sealing surfaces of the general plug valve body and the vane, so the sealing surfaces suffer neither friction nor wear, contributing to the valve's long service life and small opening/ closing torque.

Rapid seal abrasion is inherent in the designs of most ball and gate valves. The double block-and-bleed (DBB) Twin Seal general plug valve reduces this constant wear by using two seating slips mounted independently on a tapered plug by dovetails, which mechanically retract from the seating surface prior to rotating. This provides a bubble-tight verifiable dual seal without seal abrasion.
 
The general plug valve is superior to common gate and ball valves in terms of its sealing performance and service life.The general plug valve has the functions of being fireproof, on-line maintenance, double block and bleed, cavity pressure relief, internal leak detection and others. Illustrate the general plug valve's functions and applications in the oil and gas storage and transportation systems in combination with examples, which has opened new development potential for process design of oil and gas storage and transportation systems and solved many problems encountered in pipeline design. The general plug valve has not only optimized the pipeline design and improved the product quality but also saved the pipeline operation costs.



General Plug Valve Specification

1. Pressure scope :CLASS 150Lb~1500Lb
2. Nominal diameter : NPS 2~36″
3. Design standard :API 6D
4. Port : Full bore /Reduced bore
5. Body material:A105、LF2、F304、F316、F304L、F316L、F51,WCB、LCB、WCC、CF8、CF8M、CF3、CF3M、A890 4A etc.
5. End connection :RF RTJ BW
6. Drive device: Lever, Gear box, Electric, Pneumatic, hydraulic device, Pneumatic-hydraulic device


How Does A General Plug Valve Work?

1. The seals are permanently bonded into the slips, which are mounted on a central plug.In the open position, the slip seals are completely out of the flow.
2. Turning the operator handwheel clockwise rotates,the plug assembly 90° to block flow. During
rotation, clearance is maintained between the seal and the general plug valve body, enabling free movement and avoiding abrasion.
3. When the handwheel is turned farther clockwise, the tapered plug begins to lower, forcing the slips
against the body and initiating the verifiable seal. Because its seals never drag in well-maintained valves, the Twin Seal general plug valve requires less torque to cycle.
4. In the closed position, the slip seals are expanded,compressing the slip seals until metal-to-metal seating is effected. Because it is mechanical, the general plug valve does not rely on line pressure differential to help make it seal and even seals in vacuum service.

General Plug Valve Features

1. In the general plug valve's opening/closing process, there is no contact between the sealing surfaces of the valve body and the vane, so the sealing surfaces suffer neither friction nor wear, contributing to the valve's long service life and small opening/ closing torque;
2. For the general plug valve's maintenance, there is no need to remove the valve from the pipeline but just remove its bottom cover to replace the vane pair, thus very easy for the maintenance;
3. The general plug valve's body and plug are full-bore so that the medium can flow through the valve without any flow resistance.and it's also possible to clean the pipeline to overcome the shortcomings of the reduced port valve;
4. The general plug valve's cavity is plated with hard chrome and the sealing area is hard and smooth;
5. The elastic seal on the vane is made of the fluorine rubber and molded and formed in a groove of the vane surface.The fireproof metal-to-metal seal is used as the backing of the elastic seal;
6. The general plug valve is provided with an automatic bleed device(optional) which can prevent the abnormal pressure rise of the general valve cavity and check the valve's effect after the valve is completely closed;
7. The general plug valve's opening/closing indicator is in sync with the opening/closing position and can accurately display the valve's opening/closing status.

  • Dual Expanding Double Block and Bleed Plug Valve

    ( Different operation is optional. )

    • Port size:DN50-DN600
    • Pressure: CL150-CL2500
    • Medium:Water,steam,oil,gas,etc.
    • Temperature:-40~200℃,-60~450℃
    • Body material:WCB,WCC,LCB,CF8,CF8M,etc.
  • General Valve Orbit Plug Valve

    ( Different operation is optional. )

    • Port size:2"~24" (DN50~DN600)
    • Pressure: CL150-CL2500
    • Medium:Water,steam,oil,gas,etc.
    • Temperature:-40~200℃,-60~450℃
    • Body material:WCB,WC6,WC9,CF8,CF8M,etc.
  • Expanding DBB General plug valve

    ( Full bore or reduced bore is optional. )

    • Port size:DN50-DN900;2''-36''
    • Pressure: 150LB ~ 900LB
    • Medium:Water,steam,oil,gas
    • Temperature:-40~180ºC
    • Body material:Carbon Steel, Stainless Steel,forged steel
  • Dual Seal DBB Expanding Plug Valve

    ( Full bore or reduced bore is optional. )

    • Port size:DN50-DN900;2''-36''
    • Pressure: 150LB ~ 900LB
    • Medium:Water,steam,oil,gas
    • Temperature:-40~180ºC
    • Body material:Carbon Steel, Stainless Steel,forged steel
  • Reduced bore general valve,plug valve

    ( Full bore or reduced bore is optional. )

    • Port size:DN50-DN900;2''-36''
    • Pressure: 150LB ~ 900LB
    • Medium:Water,steam,oil,gas
    • Temperature:-40~180ºC
    • Body material:Carbon Steel, Stainless Steel,forged steel
  • Full bore orbit general plug valve

    ( Full bore or reduced bore is optional. )

    • Port size:DN50-DN900;2''-36''
    • Pressure: 150LB ~ 900LB
    • Medium:Water,steam,oil,gas
    • Temperature:-40~180ºC
    • Body material:Carbon Steel, Stainless Steel,forged steel
  • API 6D Double Block & Bleed Plug Valve

    ( Customized according to client's requirememt. )

    • Port size:DN50-DN900;2''-36''
    • Pressure: PN16 ~ 420,150LB ~ 2500LB
    • Medium:Water,steam,oil,gas
    • Temperature:-20~180ºC,-46~450ºC
    • Body material:Carbon Steel, Stainless Steel,forged steel
  • China double block and bleed plug valve

    ( Double block and bleed general valve plug valve )

    • Port size:DN50-DN900;2''-36''
    • Pressure: PN16 ~ 420,150LB ~ 2500LB
    • Medium:Water,steam,oil,gas
    • Temperature:-20~180ºC,-46~450ºC
    • Body material:Carbon Steel, Stainless Steel,forged steel
  • China General Valve Twin Seal Plug Valve

    ( Double block and bleed general valve plug valve )

    • Port size:DN50-DN900;2''-36''
    • Pressure: 150LB ~ 900LB
    • Medium:Water,steam,oil,gas
    • Temperature:-40~180ºC
    • Body material:Carbon Steel, Stainless Steel,forged steel
  • General Valve Twin Seal Double Block and Bleed Valve

    ( General valve with double block and bleed )

    • Port size:DN50-DN900;2''-36''
    • Pressure: 150LB ~ 900LB
    • Medium:Water,steam,oil,gas
    • Temperature:-40~180ºC
    • Body material:Carbon Steel, Stainless Steel,forged steel
  • Twin Seal Orbit General Valve

    ( Full bore or reduced bore is optional. )

    • Port size:DN50-DN900;2''-36''
    • Pressure: 150LB ~ 900LB
    • Medium:Water,steam,oil,gas
    • Temperature:-40~180ºC
    • Body material:Carbon Steel, Stainless Steel,forged steel
  • General twin seal plug valve

    ( neither friction nor wear for long service )

    • Port size:DN50-DN900;2''-36''
    • Pressure: 150LB ~ 900LB
    • Medium:Water,steam,oil,gas
    • Temperature:-40~180ºC
    • Body material:Carbon Steel, Stainless Steel,forged steel
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