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  Lubricated plug valve Natural Gas

Nominal Size Range: NPS 1/2” ~ 14”

Pressure Rating: Class 150LB ~ 900LB

Connection: Flange (RF, FF, RTJ), Butt Welded (BW), Socket Welded (SW)

Design: API 599, API 6D

Pressure-temperature rating: ASME B16.34

Butt welding design: ASME B16.25

NORTECH is one of the leading China Lubricated plug valve Natural Gas Manufacturer & Supplier.


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What is Lubricated plug valve Natural Gas ?

  Lubricated plug valve Natural Gas consists of a cavity in the middle of plug along its axis. This cavity is closed at the bottom and fitted with a sealant-injection fitting at the top. The sealant is injected into the cavity, and a check valve below the injection fitting prevents the sealant from flowing in the reverse direction.  

In order to reduce the torque of conventional metal seat lubricated plug valves, Lubricated plug valve Natural Gas are invented and widely used. In addition to the characteristics of conventional oil ubricated plug valves, the pressure balanced plug valves also have the following characteristics:

  • 1.The plug cone of the pressure balanced lubricated plug valve is mounted in an inverted position. There is a check valve on the upper part of the plug cone. When the valve is closed, due to the difference in the upper and lower cut area of the plug cone, the injected high-pressure sealing oil causes the plug body to be lifted upwardly, so that the plug body and the valve sealing surface can be better sealed.
  • 2. When the valve is opened, the pressure in the lower chamber of the valve body is balanced with the medium pressure in the pipeline. The high-pressure sealing oil in the upper chamber causes the plug body to be pushed downward, and a slight gap appears between the plug cone and the sealing surface of the valve body, the torque of the rotating plug body is effectively reduced.

Main features of Lubricated plug valve Natural Gas

Features and benefits of  Lubricated plug valve Natural Gas

  • 1.The product has reasonable structure, reliable sealing, excellent performance and beautiful appearance.
  • 2.It has structural of flip-clip balanceable pressure and light on/off operation.
  • 3.An oil groove is set between valve body and seal surface, which may infuse the seal grease to increase the seal capability.

Technical specifications of Lubricated plug valve Natural Gas

Specifications of  Lubricated plug valve Natural Gas.

Design and manufacture API 599, API 6D
Nominal Size NPS 1/2” ~ 24”
Pressure Rating Class 150LB ~ 1500LB
End connection Flange (RF, FF, RTJ), Butt Welded (BW), Socket Welded (SW)
Pressure-temperature rating ASME B16.34
Face-to-face dimensions ASME B16.10
Flange dimension ASME B16.5
Butt welding ASME B16.25

Applications of Lubricated plug valve Natural Gas

 Lubricated plug valve Natural Gas  is widely used in various industries such as petroleum, chemical industry, pharmacy, chemical fertilizer, power industry etc. It is used under nominal pressure of CLASS150-1500LBS, and works at the temperature of -40~450° C,Water,Gas,Steam and Oil etc.


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