The Three-Piece Design Ball Valve with Flanged Ends is the premier choice for critical industrial applications requiring maximum uptime and ease of maintenance. Unlike one-piece or two-piece configurations, the three-piece body consists of a center section and two flanged end caps. This "swing-out" design allows the center section—containing the ball, stem, and seats—to be serviced or replaced without removing the end flanges from the pipeline.
Available in ANSI Class 150 for standard industrial pressure and ANSI Class 300 for high-pressure environments, this valve provides a robust, bubble-tight seal for liquids, gases, and steam.
Key Features & Benefits:-
- In-Line Maintenance: The unique three-piece construction allows for quick seal and seat replacement. By removing a few bolts, the center body swings out, drastically reducing downtime and labor costs.
- Full Port (Full Bore) Design: Engineered to match the internal diameter of the pipe, providing an unobstructed flow path with zero pressure drop and high flow capacity.
- Blow-out Proof Stem: Designed with an internally loaded stem that cannot be ejected by system pressure, ensuring maximum operator safety under high-pressure conditions.
- ISO 5211 Mounting Pad: Most models feature an integrated mounting pad for easy automation, allowing for the direct attachment of pneumatic or electric actuators without brackets.
- Fire-Safe & Anti-Static: Manufactured to meet API 607 fire-safe standards and equipped with anti-static devices to ensure electrical continuity between the ball, stem, and body.
Technical Specifications:-
| Feature |
ANSI Class 150 |
ANSI Class 300 |
| Max Pressure (Cold) |
~285 PSI (20 Bar) |
~740 PSI (51 Bar) |
| Size Range |
1/2" to 12" (DN15 – DN300) |
1/2" to 10" (DN15 – DN250) |
| Body Materials |
ASTM A216 WCB (Cast Steel), ASTM A351 CF8M (316 SS) |
ASTM A216 WCB (Cast Steel), ASTM A351 CF8M (316 SS) |
| Ball & Stem |
Stainless Steel 316 (Polished) |
Stainless Steel 316 (Polished) |
| Seat Materials |
PTFE, RPTFE (Reinforced), PEEK, or Metal-to-Metal |
PTFE, RPTFE (Reinforced), PEEK, or Metal-to-Metal |
| End Connection |
Raised Face (RF) Flanged |
Raised Face (RF) Flanged |
Target Industrial Applications:-
The Three-Piece Flanged Ball Valve is a versatile workhorse for high-stakes industries:
- Chemical & Petrochemical: Handling corrosive fluids, solvents, and aggressive chemical processing lines.
- Oil & Gas: Reliable isolation for refineries, fuel transport, and midstream metering stations.
- Pharmaceutical & Food: Ideal for clean-in-place (CIP) environments where frequent valve inspection is required.
- Power Generation: Managing high-pressure condensate return and boiler feed water.
- Steam Services: Utilizing reinforced seats (RPTFE/Carbon) for stable performance in saturated steam applications.
Why Choose a Three-Piece Flanged Design?
While two-piece valves are common, the Three-Piece Flanged Ball Valve offers a significant advantage in Total Cost of Ownership (TCO). In systems where seals wear out due to abrasive media or high cycles, the ability to repair the valve in-situ—rather than replacing the entire flanged unit—saves thousands in hardware and operational delays.
