A three-way ball valve is a fluid control valve with three fluid channels. The valve is opened, closed, and the flow direction of the medium is changed by rotating a ball.
Based on their structure, three-way ball valves can be divided into T-type, L-type, and Y-type. A T-type three-way ball valve can connect three orthogonal pipes and disconnect the third channel, serving as a flow divider or merging valve. An L-type three-way ball valve can only connect two orthogonal pipes and cannot simultaneously maintain the connection of the third pipe; it only serves a distribution function. A Y-type three-way ball valve can be designed with 120° and 135° diversion ports for medium switching.
GNEE Group specializes in the production of three-way ball valves, providing valve solutions to more than 150 countries and regions worldwide. Custom Valve Designs Available – Start Your Project!
Three Way Ball Valve Technical parameters
Caliber: DN15 ~ DN250
Design and manufacturing: API608,API6D
Face-to-face dimensions: ASME B16.10,API6D
Connection forms: Flange, Wafer
Pressure test: API598,API6D
Pressure temperature level: ≤150℃
Pressure: PN16~PN40
| Item | Nominal Pressure (MPa) | ||||
| Test Pressure | 1.6 | 2.5 | 4.0 | Class 150 | JIS 10K |
| Shell (Body) Test | 2.4 | 3.8 | 6.0 | 3.2 | 2.4 |
| Seat (Seal) Test | 1.8 | 2.8 | 4.4 | 2.2 | 1.5 |
| Air Tightness Test | 0.5–0.7 | ||||
| Working Temperature | PTFE ≤ 150 °C PTL ≤ 300 °C | ||||
| Applicable Media | C: Water, Oil, Gas P: Nitric Acid Media R: Acetic Acid Media | ||||
Three Way Ball Valve Main Component Materials
| Component | Material |
|---|---|
| Body & Bonnet | WCB, CF8 |
| Ball | WCB + HCr, CF8 |
| Stem | 2Cr13, CF8 |
| Seat | PTFE |
| Packing | PTFE |
Working Principle of a Three-Way Ball Valve
The working principle of a three-way ball valve is primarily based on its unique structure and operation:
Ball and Seat: The core component of a three-way ball valve is a ball with three ports, each connecting to one of three pipes. A sealing surface is formed between the ball and the seat, ensuring that the valve prevents media leakage when closed.
Stem and Actuation Mechanism: The stem is connected to the ball. Rotating the stem rotates the ball. The actuation mechanism (such as a handwheel or electric actuator) drives the stem rotation.
Opening and Closing Process:
To open, rotate the handwheel counterclockwise (or activate the electric actuator). The stem moves in the opposite direction, and its bottom angled surface disengages the ball from the seat. The stem continues to rise and interacts with the guide pin in the stem's spiral groove, causing the ball to rotate frictionlessly until it reaches the fully open position.
To close, rotate the handwheel clockwise (or deactivate the electric actuator). The stem descends, causing the ball to leave the seat and begin rotating. Continue rotating the handwheel. The valve stem, guided by the guide pin embedded in its spiral groove, rotates both the stem and the ball 90° simultaneously. Near the close, the ball has rotated 90° without contacting the valve seat. The last few rotations of the handwheel mechanically wedge the angular plane at the bottom of the valve stem against the ball, pressing it tightly against the valve seat for a complete seal.
The main features of a three-way ball valve include:
Multi-functionality: Three-way ball valves can achieve fluid diversion or merging, suitable for various applications.
Easy operation: Simply rotating the handle changes the fluid flow direction, making operation very simple.
Excellent sealing performance: High-quality sealing materials ensure good sealing performance even under high pressure and high temperature environments.
Strong corrosion resistance: Three-way ball valves are typically made of stainless steel or alloy materials, possessing excellent corrosion resistance and suitable for various harsh environments.
Applications of Three-Way Ball Valves
Due to their unique structure and excellent performance, three-way ball valves are widely used in various industrial fields, including but not limited to:
Petroleum Industry: Used to control the flow and distribution of media such as oil and natural gas.
Chemical Industry: In chemical production, three-way ball valves can be used to control the flow and distribution of various acidic, alkaline, and corrosive media.
Metallurgical Industry: In the smelting processes of iron and steel and non-ferrous metals, three-way ball valves can be used to control the flow and distribution of high-temperature media.
Power Industry: In thermal power plants, three-way ball valves can be used to control the flow and distribution of media such as steam and water.
Other Industries: Three-way ball valves also play an important role in process pipelines in industries such as light industry, pharmaceuticals, food, textiles, papermaking, and air conditioning.
Three-Way Ball Valves factory
