Three-Piece Extended Welded Ball Valve

The three-piece extended welded ball valve is an advanced and specialized industrial valve that combines the easy maintenance of a three-piece structure, the robust sealing of a butt-weld connection, and the ability to weld directly without disassembly, preventing seal leakage.

01 Product Structure

The three-piece extended welded ball valve mainly consists of the valve body, valve cover, ball, valve stem, sealing ring, and handle.

02 Working principle

Starting process

● Closed position: In the closed position, the ball is mechanically pressed by the valve stem and tightly pressed against the valve seat.

● Turn the handle counterclockwise: When the handle is turned counterclockwise, the valve stem and the ball also rotate, causing the ball to open.

Closing process

● Open position: In the open position, the ball is mechanically pressed by the valve stem and tightly pressed against the valve seat.

● Rotate the handle clockwise: When closing, rotate the handle clockwise, and the valve stem and ball will also rotate, causing the ball to close.

03 Performance characteristics

1. Good sealing performance

The seat of the three-piece extended welded ball valve is made of sealing materials such as PTFE and PPL, effectively preventing fluid leakage and ensuring safe pipeline operation.

2. Easy to operate

The operating torque of the rotary ball valve is relatively small, requiring only a 90-degree rotation. ° It can be fully opened or fully closed, making it easy and quick to operate, suitable for situations requiring frequent use.

3. Strong corrosion resistance

The valve body and internal components can be manufactured from various materials such as 304, 316L, 2205, 2507, and WCB, which can adapt to the corrosion characteristics of different media and offer strong corrosion resistance.

04 Temperature and pressure

Temperature range

The three-piece extended welded ball valve, depending on the different sealing materials and structural designs, has varying temperature ranges it can accommodate:

1. Three-piece extended welded ball valve with PTFE (polytetrafluoroethylene) seal: typically suitable for -20 ℃ ℃ Up to 150 ℃ ℃ The temperature range on the left and right. PTFE has excellent corrosion resistance and a low coefficient of friction, and can maintain good sealing performance and operational flexibility within this temperature range.

2. The three-piece extended welded ball valve made of PPL PTFE can withstand higher temperatures and is generally capable of operating at -50 ℃ ℃ -250 ℃ ℃ Work in a temperature environment that varies from left to right. PPL PTFE sealed ball valves can maintain good sealing performance in this temperature range.

Pressure level

The operating pressure range of a three-piece extended welded ball valve typically depends on its specific model and specifications.

Generally speaking, the working pressure of this type of valve is between PN1.0-6.4MPa, but there are some special models that can withstand higher pressures. Therefore, when selecting a three-piece extended welded ball valve, users need to choose the appropriate model and specifications based on their actual needs and the pressure requirements of the pipeline system.

05 Application areas