3PC Ball Valve Socket Weld (SUS316, Manual, 1000PSI, SW)

Model: PMV-09(SW)

PMV-09(SW) is a manual ball valve featuring a precision-cast SUS316 3PC body with a socket-weld connection. Supporting a 1000PSI pressure rating and equipped with a patented anti-loosening device as a standard specification, it is used for shutoff lines on fixed welded piping in the chemical, plant, water/wastewater, and construction sectors.

Features

• Compact design for easy installation in confined spaces
• 3PC structure for easy installation and maintenance
• Custom manufacturing available per customer needs
• Leak tested per API598
• Patented anti-loosening mechanism

Specifications

Frequently Asked Questions

How do I choose between socket-weld (SW) and threaded (BSPT) connections?

Threaded connections are easy to install and disassemble, but carry a relatively higher long-term leakage risk in vibration-prone or high-temperature applications. Socket-weld requires welding during installation but offers superior long-term seal integrity and is stable in vibration and high-temperature environments. Socket-weld is generally chosen for fixed piping, high-pressure, and high-temperature lines; threaded connections are preferred for lines that require frequent disassembly.

Are there any precautions for socket-weld installation?

The standard practice is to maintain a small gap (typically around 1.5 mm) between the pipe end and the socket bore before performing a fillet weld. Welding with no gap - pipe fully bottomed out - concentrates thermal expansion stress at the socket base and can cause cracking. Please follow applicable standards such as ASME B31.

How does the 3PC structure simplify maintenance?

The 3PC body consists of a center section and two end caps. During maintenance, the socket-welded end caps remain attached to the pipeline while only the center section (containing the seat and ball) is removed and serviced. Full pipeline disassembly is not required, making this particularly advantageous for welded piping.

What applications is the 1000PSI rating suitable for?

1000PSI (approximately 69 bar) comfortably covers the 10K (approximately 145PSI) and 20K (approximately 290PSI) classes used in most domestic industrial lines. For applications requiring 2000PSI or higher - such as high-pressure steam lines or high-rise pressurized lines - please refer to the PMV-09 (HD) specification.