Three‑way Sleeve Plug Valve

The three‑way sleeve plug valve is a high‑performance 90‑degree rotating multi‑channel valve. It is used on various industrial pipelines. It can achieve fluid diversion and mixing. It can also switch the direction of fluid flow. Most ordinary valves have only two channels. This valve integrates three channels into the same valve body. It can replace several independent valves and matching pipe fittings. It can simplify pipeline layout. It can save installation space. It can help the project reduce overall costs.

Working principle

The core component of this valve is a conical plug. The plug has precision‑machined fluid channels. The operator rotates the valve stem. The stem will make the plug rotate 90 degrees. The channels inside the plug will align with different interfaces on the valve body. The flow direction of the fluid will change. This valve has two commonly used channel structures. The two structures are L‑shaped and T‑shaped.

The L‑shaped channel can switch the flow between two pipes. It can connect one inlet to a selected outlet. It simultaneously closes the remaining third interface. We usually use it to switch the flow direction of the fluid. It cannot simultaneously open all three interfaces.

The T‑shaped channel can separate the flow. It can also mix the flow. It can split one flow into two and send it to two outlets. It can combine two incoming flows. The combined flow is then sent out from the same outlet. When the plug is rotated to a specific angle, it can simultaneously connect three interfaces. It can meet the demand for medium distribution in the production process.

There is a set of replaceable sealing sleeves installed between the plug and the valve body. The sleeves are usually made of PTFE or modified fluoroplastics. The sleeves can achieve 360‑degree tight sealing. When the valve is working normally, we do not need to add additional sealing grease. The sleeves can reduce the friction resistance during the rotation of the plug. The sleeves can protect the metal plug. The fluid will not directly erode and wear the plug surface.

Main technical parameters

· Size range: DN15‑DN500 (NPS 1/2"‑20")

· Pressure rating: PN0.6‑42 MPa, Class150‑Class2500

· Operating temperature: -29℃ ~ 550℃

· Body material: ductile iron, WCB carbon steel, LCB low‑temperature steel, CF8/CF8M stainless steel, alloy steel, etc.

· Operation: lever, worm gear, pneumatic, electric, hydraulic

· Standards: API 599, API 6D, ISO, ASME, DIN, JIS

· End connections: RF flange, RTJ flange, threaded, butt‑weld ends are all selectable

Main advantages

1. 3‑way sleeved plug valve can achieve bidirectional sealing. It delivers zero‑leakage performance for process media. The replaceable sealing sleeve can ensure reliable shut‑off. The staff can directly disassemble and replace the sealing sleeve on‑site. We don't need to replace the entire valve body. The maintenance operation is simpler.

2.3‑way sleeved plug valve can handle various corrosive media. It can convey corrosive liquids, acid solutions, caustic soda, high‑temperature steam, viscous liquids. It can also convey media with fine solid particles. The internal cavity surface of the valve is smooth. The medium is not prone to accumulation. The medium is also not prone to crystallization or agglomeration inside the valve.

3.The operator only needs to rotate 90 degrees. The valve can complete the path switching. It has a fast response speed. It is suitable for use in automated production lines.

4.A single valve can achieve the functions of medium diversion and mixing. It can reduce the number of valves, flanges, and sealing gaskets in the entire pipeline. The number of pipeline interfaces is reduced. The risk of medium outward leakage is also reduced.

Typical application industries

The three‑way sleeve plug valve is widely used in petroleum, petrochemical, chemical, metallurgical, power generation, mining, papermaking and water‑treatment industries. Its common application scenarios include pump loop switching, heat exchanger medium distribution, process fluid mixing, bypass pipeline control, circulating water system.

Please reach out to ZZJG VALVE for further information or project‑related inquiries.