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Pressure Balanced Twin Plug Valve


  • Port size:1/2"~24" (DN15~DN600)
  • Pressure:PN16-PN420 CL150-CL2500
  • Medium:Water,steam,oil,gas,etc.
  • Temperature :-40~450℃
  • Body material:WCB,CF8,CF8M,CF3,CF3M etc.
  • Description:Pressure Balanced Twin Plug Valve Manufacturer, factory and supplier.
Pressure Balanced Twin Plug Valve Manufacturer, factory and supplier. Pressure Balanced Twin Plug Valve is a reliable with two independent plugs in one body. Pressure Balanced Twin Plug Valve is ideal for double block and bleed applications. 

The oil and gas industry is no longer satisfied with the shut-off provided by conventional double block and bleed ball, gate or plug valves. True double block has become a prime requirement as safety standards are raised throughout the industry, especially where it is necessary for an operator to work downstream (or upstream) of the valve. A further advantage of true double isolation (where the first plug gives complete isolation), is that the bleed point can be used to verify that no contamination has occurred when more than one type of line medium has passed down the pipeline.

Pressure Balanced Twin Plug Valve is designed for use in critical services where, verifiable tight shutoff is demanded. The design of the Double Isolation Lubricated Plug Valve is very compact with focus on space and weight savings. Furthermore, the design has far less possible leak paths compared to the conventional Double Block & Bleed Valve assemblies.

As a secondary seal, Pressure Balanced Twin Plug Valve is provided with a lubrication system which allows feeding a special lubricant into the valve while the valve is in operation. Besides, sealing, the purpose of the lubricant is to protect the internals of the valve against corrosion and wear as well as reducing the valve torque.

A new feature has been added to protect against possible overpressure in the inner cavities (between, in and below the two plugs), this feature is a Patented Pressure Relief Bore.

This feature is a bore going from the body sealing surface against the diaphragm, to the port outside of each plug. While operating normally, the bore is kept closed by the pressure of the bottom cover, obtained by studs and nuts, against the diaphragms.
A bleed port is available in configuration as per customer preference. This port allows access to verify the sealing of the valve itself. Any leakage past the first plug would be detected via the bleed port.


Pressure Balanced Twin Plug Valve technical Specification:

Design & manufacturer API599, API6D
Nominal diameter 1/2'' ~ 24''( 15mm ~ 600mm)
Pressure class Class 150 ~ Class 2500
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

Pressure Balanced Twin Plug Valve feature:
1. Improved plant and personnel safety assured by a double isolation design that allows the operator to verify valve isolation before carrying out maintenance
2. A cost-, space- and weight-saving alternative to a double block and bleed system using two valves in a series
3. Ease of installation from a compact design with the same face-to-face dimension as a single valve, often replacing it without the need for pipe work modifications
4. Greater process control via pressure balanced design that provides a true bubble-tight double isolation capability within a single valve body