A two-piece ball valve is a type of ball valve consisting of a ball, stem, cover, and seals. The ball comprises two hemispheres sealed together by a seal. The stem is connected to the ball via the cover, and rotating the stem controls the opening and closing of the ball.
The main function of a two-piece ball valve is to control the flow and pressure of media in a pipeline, performing functions such as shut-off, regulation, and diversion. Due to the excellent sealing performance of its ball, it can be used in high-pressure, high-temperature, and highly corrosive media conditions.
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two-piece ball valve Technical parameters
Size: 1/4″ to 2″
Body Material: Stainless Steel 316
Handles Material: Stainless Steel 304
Port Type: Full Port Ball Valve
End Connection: Threaded (FNPT X FNPT)
Temperature Rating: -20°C ~ 150°C
Pressure Class: 1000 PSI
Seal: PTFE
Two-piece ball valves features:
- Low fluid resistance: Full-bore flow channel design, resistance coefficient equal to that of a pipe section of the same length.
- Compact structure: Small size and light weight, easy to install and maintain.
- Reliable sealing: Widely uses sealing materials such as plastics, suitable for vacuum systems.
- Easy operation: Quick opening and closing, convenient for remote control.
- Simple maintenance: Movable sealing ring, easy to disassemble and replace.
- Wide application range: Applicable to pipe diameters from a few millimeters to several meters, from high vacuum to high pressure.
- Friction-free opening and closing: Extends valve service life.
- Top-entry structure: Facilitates online inspection and maintenance, reducing equipment downtime.
Drawings for a 2-piece ball valve customized for a Saudi customer
two-piece ball valve Material Chart:
| No. | Part Name | Material | No. | Part Name | Material |
|---|---|---|---|---|---|
| 1 | Body | SS316 | 8 | Anti-Static Device | SS304 |
| 2 | Cap | SS316 | 9 | Stem Packing | PTFE |
| 3 | Seat | PTFE | 10 | Packing Gland | SS304 |
| 4 | Ball | SS316 | 11 | Spring Washer | SS301 |
| 5 | Seal Gasket | PTFE | 12 | Handle | SS201 |
| 6 | Stem Seal | PTFE | 13 | Stem Nut | SS304 |
| 7 | Stem | SS316 |
two-piece ball valve Dimension and Weights List (mm)
| Size | Connection | NPT | L | H | W | Weight (kg) |
| 1/4″ | NPT | 10 | 53 | 45 | 100 | 0.21 |
| 3/8″ | NPT | 12 | 53 | 45 | 100 | 0.25 |
| 1/2″ | NPT | 15 | 62 | 49 | 104 | 0.3 |
| 3/4″ | NPT | 20 | 70 | 55 | 118 | 0.51 |
| 1″ | NPT | 25 | 81 | 67 | 145 | 0.75 |
| 1 1/4″ | NPT | 32 | 95 | 70 | 145 | 1.48 |
| 1 1/2″ | NPT | 38 | 105 | 80 | 177 | 1.72 |
| 2″ | NPT | 50 | 117 | 92 | 177 | 3.08 |
two-piece ball valve Working Principle
The two-piece ball valve works by controlling the flow of media through the rotation of the ball:
Opening Process: Turning the handwheel counterclockwise or operating the actuator raises the valve stem, causing the ball to disengage from the valve seat and begin rotating until it reaches the fully open position, allowing the media to flow smoothly.
Closing Process: Turning the handwheel clockwise lowers the valve stem, causing the ball to rotate and finally wedge tightly onto the valve seat, achieving a complete seal and preventing the media from passing through.
The opening and closing process involves no friction between the ball and the valve seat, ensuring reliable sealing performance. Operation is simple; a 90-degree rotation is all that is needed to achieve full opening or full closing.
Applications of Two-Piece Ball Valves:
1. Petrochemical Industry: Two-piece ball valves are widely used in the petrochemical industry. For example, they can be used in the inlet and outlet systems of storage tanks, pipelines, and equipment to achieve functions such as fluid control, flow control, and pressure maintenance.
2. Pharmaceutical Industry: The pharmaceutical industry has high requirements for valve cleanliness, and two-piece ball valves are commonly used in pharmaceutical production processes. For example, they are used in pharmaceutical reaction vessels and filling equipment.
3. Power Industry: In the power industry, two-piece ball valves can be used to regulate cooling water, circulating water, and other media to ensure the safe and stable operation of power plants.
4. Waterworks: In waterworks, two-piece ball valves are commonly used for pipeline control and backflow prevention.
two-piece ball valve factory
