L&T Flanged Ball Valve

Ultimate Technical Guide to L&T Flanged Ball Valves: Features, Specifications & Industrial Uses

In process industries where absolute tight shut-off, low maintenance, and high flow throughput are essential, L&T Flanged Ball Valves (manufactured by L&T Valves) serve as the industry standard. Featuring a 2-piece split-body design and full-bore flow passages, these soft-seated valves are engineered for low operating torque and superior fire-safe reliability.

Key Design & Safety Features

• Quarter-Turn Isolation: Swift 90-degree lever rotation enables immediate fluid shut-off during emergency shutdowns.
• Fire-Safe & Anti-Static Design: Incorporates primary soft seating backed by secondary metal-to-metal seating to retain pressure integrity during fire events. Built-in grounding springs maintain continuity across the ball, stem, and body.
• Blowout-Proof Stem: Bottom-entry stem assembly with an integral shoulder prevents stem ejection even under severe line pressure spikes.
• Direct Actuation Interface: Features an ISO 5211 top flange for seamless mounting of pneumatic actuators, electric motors, or gear drives without requiring extra brackets.

Technical Specifications Summary

• Size Range: ½" to 12" (DN15 – DN300)
• Pressure Ratings: ASME Class 150, Class 300, and Class 600
• Design Standards: ISO 17292, BS 5351, ASME B16.34, API 6D
• Testing Standards: API 598, BS EN 12266-1
• Fire Safety Certification: API 607 / ISO 10497 certified
• Face-to-Face Standard: ASME B16.10
• End Connections: Flanged Raised Face (ASME B16.5 RF)

Material Construction

• Valve Body: ASTM A216 WCB (Carbon Steel), ASTM A351 CF8 (SS304), ASTM A351 CF8M (SS316)
• Ball & Stem: High-grade solid Stainless Steel SS304 / SS316 with mirror-finish polishing
• Soft Seats: Virgin PTFE, Glass-Filled PTFE (GFT), Carbon-Filled PTFE (CFT), and PEEK
• Gland Packing: Die-formed flexible graphite with anti-extrusion rings

Primary Industrial Applications

• Oil & Gas Transport: Hydrocarbon pipelines, refinery process units, and tank farm manifolds.
• Chemical Processing: Solvent transfer, acid handling, and polymer production lines.
• Power & Utilities: Cooling water networks, fuel gas supply, and low-pressure steam headers.
• Water Treatment: Desalination facilities, industrial effluent processing, and pumping stations.