3 PC Flanged Ball Valve

3 PC Flanged Ball Valve Product Overview

The SIYelectric 3 Piece Flanged Ball Valve is an industrial quarter-turn valve designed for reliable shut-off, easy maintenance, and long-term service in process piping systems.

A typical 3 piece flanged ball valve consists of two flanged end connections and one central valve body. The ball, seats, and seals are housed inside the center body. This structure allows the center section to be removed for maintenance, cleaning, or replacement of internal components while the end flanges remain connected to the pipeline.

This design is especially suitable for systems where regular inspection, cleaning, or maintenance is required, such as chemical processing, pharmaceutical utilities, oil and gas systems, water treatment, industrial skids, and general process pipelines.

Product Description

The 3 PC flanged ball valve combines the secure installation of flanged connections with the maintenance convenience of a three-piece body structure. The flanged ends provide stable pipeline connection, while the removable center body makes servicing easier than one-piece or two-piece designs.

Inside the valve, a precision-machined ball with a central bore controls the flow. When the bore is aligned with the pipeline, the medium passes through. When the handle is rotated 90 degrees, the ball turns to the closed position and blocks the flow path.

With a full port design, the valve provides a large flow passage and helps reduce pressure drop. Stainless steel material options, including CF8 / SS304 and CF8M / SS316, allow the valve to be selected according to medium compatibility, corrosion resistance, and operating environment.

Key Features

Three-Piece Body Structure

The valve consists of two flanged ends and one removable center body. This design makes inspection, cleaning, and internal component replacement more convenient.

Maintenance-Friendly Design

The center body can be removed without disturbing the pipeline flanges, helping reduce maintenance time and simplifying service work.

Flanged End Connection

Flanged ends provide secure installation in industrial piping systems and are suitable for applications where strong mechanical connection and easy removal are required.

Full Port Flow Path

The full port design helps maintain high flow capacity and reduce pressure loss through the valve.

Quarter-Turn Operation

The valve opens and closes with a simple 90-degree handle movement, providing fast and clear on/off control.

Stainless Steel Material Options

Available in CF8 / SS304 and CF8M / SS316. SS316 is recommended for more corrosive media or demanding chemical environments after compatibility confirmation.

Locking Handle Option

A lockable handle can be selected to help prevent unauthorized or accidental valve operation.

ISO 5211 Mounting Pad Option

An optional ISO 5211 mounting pad allows the valve to be fitted with pneumatic or electric actuators for automated operation.

Technical Specifications

Applications

Chemical Processing

Used in chemical pipelines, dosing systems, process skids, and production lines where reliable shut-off and convenient maintenance are required. For corrosive media, CF8M / SS316 material is usually preferred.

Pharmaceutical Utilities

Suitable for utility lines, cleaning systems, water systems, and auxiliary fluid control where valves may need periodic inspection or cleaning. For direct sanitary contact, sanitary valve design and surface finish requirements should be confirmed separately.

Oil and Gas Industry

Applied in oil, gas, fuel, auxiliary process pipelines, pressure systems, and utility lines where durable isolation and serviceability are important.

Water Treatment Systems

Used in filtration units, pumping stations, treatment equipment, distribution pipelines, and industrial water systems.

Industrial Process Pipelines

Suitable for manufacturing plants, equipment piping, process skids, compressed air systems, water lines, oil lines, and compatible chemical fluid systems.

Automated Control Systems

With the optional ISO 5211 mounting pad, the valve can be equipped with pneumatic or electric actuators for remote or automatic on/off control.

Advantages

• Three-piece body design allows easier cleaning, inspection, and maintenance.
• Removable center body helps service internal parts without disturbing pipeline flanges.
• Flanged connection provides secure installation and convenient pipeline integration.
• Full port design helps reduce pressure drop and maintain flow capacity.
• Quarter-turn operation provides fast and simple shut-off control.
• SS304 and SS316 material options support different media and corrosion requirements.
• Lockable handle option helps improve site operation safety.
• ISO 5211 mounting pad option supports actuator installation for automation.
• API 598 and EN 12266-1 testing helps verify sealing and pressure performance.
• Suitable for frequent maintenance applications compared with one-piece or two-piece ball valves.

Selection Notes

When selecting a 3 piece flanged ball valve, confirm the following details:

1. Pipeline size
   Confirm the required nominal size, such as DN15, DN25, DN50, DN80, or DN100.
2. Flange standard
   Confirm whether the project requires ASME B16.5, DIN 2501, or another flange standard.
3. Material selection
   • SS304 / CF8: suitable for water, air, oil, and mild media.
   • SS316 / CF8M: recommended for chemical, coastal, or more corrosive environments.
4. Maintenance requirement
   If the system requires frequent cleaning or internal inspection, a three-piece structure is usually more convenient than a one-piece or two-piece design.
5. Automation requirement
   Choose the ISO 5211 mounting pad option if pneumatic or electric actuator installation is required.
6. Operating pressure and temperature
   Confirm that PN40 pressure rating and -20°C to 180°C temperature range match the actual working conditions.