3PC Socket-welded Ends Stainless Steel Ball Valve

The 3PC Socket-welded Ends Stainless Steel Ball Valve combines a three-piece stainless steel body with socket-weld ends for compact, permanent pipeline connections. Its split-body construction allows internal seals and other serviceable components to be accessed after the valve is isolated and depressurized. The full-port flow passage supports low flow resistance, while the ball-and-seat design provides bi-directional shut-off for compatible fluids. It is suitable for high-pressure piping in oil and gas, chemical processing, water treatment and other industrial systems.

Main Dimensions

* N: Thread ends according ANSl B 2.1 NPT
* B: Thread ends according BS21 BSP

KvVALUES

Kv (m3/h) = Flow rate of water in cubic meter per hour that will generate a pressure drop of 1 bar across the valve.

Valve Functions & Key Features

1. Socket-Weld Connection

The socket-weld ends are machined to the specified connection dimensions for welded installation with compatible piping. This connection is commonly used on small-bore industrial lines where a permanent pipe-to-valve joint is required. Welding should follow the applicable piping specification and procedure.

2. Three-Piece Body

The three-piece bolted body allows access to the valve's internal components after the pipeline has been isolated and depressurized. Seals and other serviceable parts can be inspected or replaced without replacing the complete valve assembly.

3. Ball and Seat Sealing

The ball rotates against the seat to open or close the flow passage. The valve provides shut-off in both flow directions when the selected seat and sealing materials are suitable for the service conditions. The flow passage also allows fluid to pass through the valve with limited obstruction when fully open.

4. Stainless Steel Construction

Stainless steel construction is available for applications involving compatible water, oil, gas and chemical media. The material selection should take into account the fluid composition, concentration, operating temperature, pressure and corrosion conditions.

About Shangtai

Shangtai is based in Wenzhou, Zhejiang, China, and manufactures industrial valves for domestic and export markets. Its production activities cover machining, valve assembly, pressure testing, inspection and product marking.

The quality management system is certified to ISO 9001, and CE documentation is available for applicable products. Inspection can include incoming material checks, in-process inspection, finished valve inspection and pre-shipment checks according to the order requirements.

For socket-weld ball valves, different connection configurations can be supplied according to the required dimensions and applicable standards. Type A and Type B socket-weld configurations are available for specific requirements, with the connection dimensions confirmed before production.

FAQ

1. What is the difference between socket-weld and threaded connections?

Socket-weld connections use a welded joint between the valve and pipe, while threaded connections rely on matching pipe threads. Socket-weld ends are commonly specified for small-bore piping where a permanent welded connection is required. The appropriate connection depends on the piping standard, pressure, temperature and installation requirements.

2. Are different socket-weld configurations available?

Yes. Different socket-weld configurations can be supplied according to the required dimensions and applicable piping standards. The connection type and dimensional requirements should be confirmed before production, particularly for replacement valves and export projects.

3. Can the valve be opened for internal maintenance?

Yes. The three-piece body can be separated after the pipeline has been isolated and depressurized, allowing the internal seals and other serviceable components to be inspected or replaced. The valve should not be disassembled while the pipeline is pressurized.

4. What documents are available with the valve?

ISO 9001 and CE documentation can be provided for applicable configurations. Material documentation, inspection records, test reports and product drawings can also be supplied according to the order and project requirements.

5. What applications are suitable for a 3PC Socket-welded Ends Stainless Steel Ball Valve?

The valve can be used for compatible fluids in oil and gas, petrochemical, chemical processing, water treatment, power generation and general industrial piping. Material, seat and sealing components should be selected according to the actual medium, pressure and temperature.

6. What information is required for valve selection?

Key information includes valve size, pressure rating, socket-weld dimensions, working medium, operating pressure, temperature, body and sealing materials, quantity and applicable standards. For replacement projects, existing valve drawings or dimensional information can also be provided for confirmation.