Leader Cast Steel Gate Valve
Leader Cast Steel Gate Valve: Technical Specifications & Industrial Guide
Leader Cast Steel Gate Valves are heavy-duty, bi-directional isolation valves engineered for full-flow, minimal pressure drop operation in high-pressure and high-temperature pipeline systems. Built in compliance with international design standards like API 600, BS 1414, and ASME B16.34, these valves feature a flexible or solid wedge design to ensure reliable tight shut-off across critical steam, hydrocarbon, and chemical processing networks.
Key Technical Specifications
|
Parameter |
Standard Technical Specification |
|
Design Standards |
API 600 / BS 1414 / ASME B16.34 |
|
Testing Standards |
API 598 / BS EN 12266-1 |
|
Size Range |
DN 50 mm to DN 600 mm ($2''$ to $24''$) |
|
Pressure Class |
ASME Class 150, Class 300, Class 600, Class 900, Class 1500 |
|
Body & Bonnet Material |
Cast Carbon Steel (ASTM A216 Gr. WCB) | Alloy Steel (ASTM A217 Gr. WC6 / WC9) |
|
Trim Options (API Trim Nos.) |
Trim 1 (13% Cr), Trim 5 (Full Stellite), Trim 8 (13% Cr / Stellite) |
|
Stem & Yoke Construction |
Outside Screw and Yoke (OS&Y), Rising Stem with Non-Rising Handwheel |
|
End Connections |
Flanged (ASME B16.5) / Butt-Weld Ends (ASME B16.25) |
Core Construction Features & Benefits
- Full-Bore Straight-Through Flow: Straight-through body design minimizes flow resistance and friction head loss, allowing high fluid throughput during full-open operation.
- Flexible Wedge Disc: Self-adjusting flexible wedge compensates for seat face misalignment caused by pipeline stress or thermal expansion, preventing wedge binding in high-temperature lines.
- Hardened Stellite Seating: Seating faces and wedges hardfaced with Stellite cobalt alloy offer high resistance to wear, galling, and erosion from high-velocity steam or particulate media.
- OS&Y Rising Stem Design: External stem threads are isolated from line media, protecting them from internal corrosion while serving as an immediate visual position indicator.
- Integral Backseat Feature: Allows stem packing replacement under full line pressure when the valve is in the fully open position.
Primary Industrial Applications
- Power Generation & Steam Plants: Isolation duty on high-pressure saturated and superheated steam mains, boiler feedwater lines, and turbine isolation.
- Oil & Gas Refineries: Full-bore isolation on crude oil pipelines, hydrocarbon gas processing, and catalytic cracking units.
- Petrochemical Facilities: Handling organic and inorganic chemicals, process solvents, and high-temperature utility loops.
- Fertilizer & Water Treatment: Mainline isolation in high-pressure water supply, process cooling, and utility networks.
