
3 Way Plug Valve
The three-way plug valve is a rotary valve with a closing member or plunger shape. It is opened or closed by rotating 90 degrees so that the channel opening on the valve plug is aligned with or separated from the channel opening on the valve body.
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Products Description
A three-way plug valve (or T-port valve) is a type of valve that switches the flow direction of media by rotating the plug body, representing a specific category within plug valves. Its core structure consists of a valve body, a plug (spool), sealing packing, and an actuating mechanism. The plug is typically cylindrical or conical and is machined with flow channel ports. A 90-degree rotation aligns or offsets these plug ports with the valve body's passageways, achieving opening, closing, or flow direction switching. The three-way design enables it to perform diverting or combining functions, connecting three pipelines and controlling the media flow direction.
Operating Principle
The core component of a three-way plug valve is a spherical or cylindrical plug with drilled ports, installed between two flanges. When the plug is oriented at a specific angle (typically 90 degrees), it connects one or two flow paths. Rotating the plug to another position closes the corresponding passage(s). This design enables the three-way plug valve to flexibly control connections between multiple pipelines, facilitating functions such as bidirectional flow or unidirectional isolation.
Application Fields
Widely used in industries including petroleum, chemical, natural gas, and power generation. Particularly suited for scenarios requiring rapid flow direction switching or media distribution, such as:
Pipeline branch control
Equipment switching
Emergency shutoff.
Key Advantages & Features
Quick Actuation: Achieves state changes with a 90-degree rotation, offering fast response.
Low Fluid Resistance: Features a straight-through flow path design that minimizes pressure drop.
Compact Design: The three-way configuration reduces the number of valves required and simplifies piping layouts.
High Adaptability: Supports bidirectional flow, allowing flexible installation orientation in most applications.
Products specification
- Operation: Wrench, worm & worm gear, pneumatic, electric-actuated
- Design Standard: API 599, API 6D
- Face to Face: DIN 3202, ASME B16.10
- Flange Ends: DIN 2543 - 2545, ASME B16.5
- Test & Inspection: DIN 3230, API 599, API 6D
3 Way Plug Valve



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