Three Piece Full Port Socket Weld Ball Valves – 316 Stainless Steel

Three piece full port socket weld ball valves are designed for inline maintenance, cleaning, and reliable shut-off performance in industrial piping systems. The three-piece body construction allows the center section to be removed while the welded end connections remain in place, making these valves ideal for applications requiring routine servicing.

Manufactured from 316 stainless steel, these socket weld 3 piece ball valves provide corrosion resistance, durability, and dependable performance in water, oil, gas, and industrial fluid handling and process systems. Their full port design maintains maximum flow capacity with minimal pressure drop, while socket weld ends allow installation into welded piping systems for a permanent, high-strength, leak-resistant connection.

Advantages:

• ● Designed for easy cleaning and inline servicing without removing the valve from the pipeline
• ● Socket weld connections provide a permanent, high-strength, leak-resistant seal

Key Features:

• ● Suitable Media: Water, Oil, and Gas (WOG)
• ● End Connections: Socket Weld
• ● Port: Full port design for maximum flow capacity
• ● Pressure Rating: 1000 WOG (6.4MPa)
• ● Temperature Range: -4°F to 302°F (-20°C to 150°C)
• ● Stem Design: Blow-out proof
• ● Handle: Lever style with removable locking device
• ● Seats and Seals: PTFE (Teflon)
• ● Body Material: 316 Stainless Steel (CF8M)
• ● Non-wetted Components: 304 Stainless Steel

Socket Weld 3 Piece Ball Valve Dimensions

Dimensions vary by valve size from 1/4" through 4". Refer to the dimensional drawings below for sizing and installation reference.

Socket Weld 3 Piece Ball Valve Material List

Material composition details are provided above and may vary slightly by valve size.

Socket Weld 3 Piece Ball Valve Pressure Chart

Pressure ratings are based on operating temperature conditions; refer to the chart below for application guidance.

What is a Socket Weld 3 Piece Ball Valve?

A socket weld 3 piece ball valve is a serviceable shut-off valve designed for welded piping systems, featuring socket weld end connections and a removable center body that houses the ball and seats. The three-piece construction allows maintenance, inspection, or seat replacement to be performed without removing the welded end connections from the pipeline.

This design is commonly used in high-pressure and high-vibration applications where a permanent, leak-resistant connection is required and long-term reliability is critical.

Socket Weld vs Threaded 3 Piece Ball Valves

The primary difference between socket weld and threaded 3 piece ball valves is the connection method. Socket weld valves are permanently welded into the pipeline, providing a stronger, more secure connection for high-pressure and high-vibration systems.

Threaded 3 piece ball valves use female NPT connections, allowing for easier installation and removal, making them better suited for applications where disassembly or replacement is required.

3 Piece vs 2 Piece Ball Valves

The primary difference between a 3 piece ball valve and a 2 piece ball valve is serviceability. A three-piece valve allows the center body section to be removed while the end connections remain attached to the pipeline, enabling inline maintenance and reducing downtime.

Two-piece ball valves are more compact and cost-effective, but typically require removal from the pipeline for internal servicing. Three-piece ball valves are preferred in applications requiring frequent cleaning, inspection, or seal replacement.

Why Choose Socket Weld 3 Piece Ball Valves

Socket weld 3 piece ball valves are designed for applications where reliability, structural strength, and long-term performance are critical. Their three-piece body construction allows internal components to be accessed without removing the valve from the pipeline, while the welded end connections provide a permanent, high-strength seal.

• Inline maintenance without removing pipe connections
• Permanent welded connection for long-term reliability
• Full port design maintains maximum flow capacity
• Durable 316 stainless steel construction for corrosion resistance

Frequently Asked Questions

What is a 3 piece ball valve used for?

3 piece ball valves are used in applications where maintenance, cleaning, or inspection is required without removing the valve from the pipeline. 

What type of end connection do these valves use?

These valves use socket weld ends, allowing them to be permanently welded into the piping system for a secure, leak-resistant connection. 

What is the advantage of a 3 piece ball valve?

The main advantage is serviceability. The center section can be removed while the valve remains installed, reducing downtime and simplifying maintenance.

Are 3 piece ball valves full port?

Yes, these valves feature a full port design, allowing unrestricted flow and minimal pressure drop.

How do socket weld 3 piece ball valves compare to threaded 3 piece ball valves?

Socket weld 3 piece ball valves provide a stronger, permanent connection, while threaded 3 piece ball valves allow easier removal and replacement.

What pressure rating do these valves have?

These valves are rated to 1000 WOG, making them suitable for water, oil, and gas applications within that pressure range.

Other Stainless Steel Ball Valve Types

In addition to socket weld 3 piece ball valves, other stainless steel ball valve designs are available to suit different installation, connection, and maintenance requirements.

• 1 Piece Stainless Steel Ball Valves – compact valves for general shut-off applications.
• 2 Piece Full Port Threaded Ball Valves – durable valves for standard industrial use where servicing is less frequent.
• Threaded 3 Piece Ball Valves – designed for inline maintenance with removable threaded connections.
• 3 Piece Stainless Steel Ball Valves – full category including threaded, socket weld, and sanitary configurations.

Specifications: