Plug Valve

A plug valve is a type of valve that uses a plug body (valve core) with a through-hole as the opening and closing element. By rotating the plug body, the relative position between the through-hole and the flow channel inside the valve body can be changed, achieving rapid opening and closing, diversion or direction change of the pipeline medium. It has the characteristics of compact structure and low opening and closing torque.Widely used in industries such as petrochemicals, natural gas transportation, food and pharmaceuticals, and water supply and drainage, it is suitable for working conditions ranging from low temperature and low pressure to high temperature and high pressure. It can control water, steam, oil products, natural gas, and corrosive media, especially suitable for pipeline systems that require rapid reversal or diversion.

Common Types

  • Straight through plug valve: The flow channel is linear with low resistance, suitable for one-way on-off control of media
  • Three way plug valve: with diversion and merging functions, it can switch the flow direction of pipeline media
  • Four way plug valve: suitable for multi-directional medium distribution in complex pipelines, often used in fluid reversing systems
  • Oil sealed plug valve: oil seal is filled between the plug body and the valve seat, which improves the sealing performance and is suitable for high-pressure working conditions

Structural Advantages & Corresponding Benefits

  1. Wear resistant coating valve core structure

  • Special point: The surface of the valve core is sprayed with a hard alloy wear-resistant coating, which is combined with precision grinding of the valve seat to achieve high sealing surface adhesion.
  • Result:The wear and corrosion resistance has been improved by 60%, the sealing performance is stable, the service life of the valve is extended, and it is suitable for working conditions containing granular media.

  1. Quick installation seamless valve stem structure

  • Special point:  Adopting an anti loosening valve stem and limit pin design, the valve stem is seamlessly connected to the plug body, allowing for 360 ° precise positioning.
  • Result: No jamming during opening and closing, precise and error free commutation, no medium leakage, suitable for automated high-frequency operation scenarios.