L&T 3 PIECE DESIGN BALL VALVE FULL BORE
L&T 3-Piece Design Ball Valve (Full Bore): Technical Overview & Specifications
The L&T 3-Piece Design Full Bore Ball Valve is a heavy-duty industrial valve engineered for bi-directional flow shut-off in high-pressure and critical process applications. The full-bore (full port) configuration ensures the internal bore diameter matches the pipe's internal diameter, resulting in unrestricted flow and minimal pressure drop across the valve. Its 3-piece bolted design allows the center section containing the ball and seats to be swung out or removed for online maintenance without disturbing the connected pipeline flanges.
|
Feature / Parameter |
Technical Specifications |
|
Bore Type |
Full Bore (Full Port) — Maximum flow capacity ($C_v$) |
|
Size Range |
DN15 to DN300 (1/2" to 12") |
|
Pressure Ratings |
ASME Class 150, Class 300, Class 600, and ASME Class 800 (Forged) |
|
Body Construction |
3-Piece Bolted (Center body with two end connectors) |
|
Body Materials |
Forged Carbon Steel (A105), Cast Carbon Steel (WCB), Stainless Steel (CF8 / CF8M / SS316) |
|
Seat / Seal Materials |
PTFE, R-PTFE (Reinforced PTFE), Devlon, PEEK (for high temp/pressure) |
|
End Connections |
Screwed (NPT / BSP), Socket Weld (SW), Butt Weld (BW), Flanged (ANSI B16.5) |
|
Design Standards |
API 6D, BS EN ISO 17292 (BS 5351), ASME B16.34 |
|
Testing Standards |
API 598, ISO 5208, API 6FA / ISO 10497 (Fire Safe Certified) |
Key Design & Operational Features
- Swing-Out Center Section: The 3-piece construction enables easy replacement of seats and seals in-line, drastically reducing plant downtime during routine servicing.
- Blowout-Proof Stem Design: Bottom-entry stem loading with an integral shoulder prevents stem ejection under internal line pressure surges.
- Fire-Safe Construction: Engineered with secondary metal-to-metal seating that ensures positive sealing even if soft PTFE seats burn out during a fire.
- Anti-Static Device: Spring-loaded contact pins ensure continuous electrical grounding between the ball, stem, and valve body to dissipate static electricity build-up.
- ISO 5211 Mounting Pad: Standardized top flange integration allows direct mounting of pneumatic or electric rotary actuators without specialized brackets.
Common Industrial Applications
- Hydrocarbon refining, oil & gas transportation lines, and petrochemical plants
- High-pressure steam utilities, boiler feed lines, and thermal fluid networks
- Chemical processing plants handling corrosive or abrasive media
- Industrial gas distribution networks and compressed air lines
