Audco Gate Valve
Audco Gate Valves (manufactured under L&T Valves / Audco) are heavy-duty, bi-directional isolation valves designed for full-flow applications where low flow resistance and minimal pressure drop are critical. Built with a wedge-type gate and outside screw and yoke (OS&Y) design, these valves deliver tight shut-off across high-pressure oil, gas, steam, and industrial pipelines.
Technical Specifications
|
Feature |
Specification Details |
|
Size Range |
Forged Steel: ½" to 2" (DN15 – DN50) Cast Steel / Alloy: 2" to 72" (DN50 – DN1800) |
|
Pressure Ratings |
ASME Class 150, 300, 600, 800, 900, 1500, and 2500 |
|
Design Standards |
API 600, API 603, API 602 (Forged), BS 1414, ISO 10434, ASME B16.34 |
|
Testing Standard |
API 598 (Hydrostatic & Pneumatic Shell/Seat Test) |
|
End Connections |
Flanged (ASME B16.5 / B16.47), Butt Weld (B16.25), Socket Weld (B16.11), Screwed (NPT) |
|
Special Configurations |
Extended Bonnet (Cryogenic), Bellows Seal, IBR-certified options |
Material Options
- Carbon Steel: ASTM A216 WCB / WCC (Cast), ASTM A105N (Forged)
- Stainless Steel: ASTM A351 CF8, CF8M, CF3, CF3M, ASTM A182 F316 / F304
- Alloy Steel: ASTM A217 WC6, WC9, C5, C12, ASTM A182 F11, F22
- Wedge Types: Flexible wedge (standard for thermal expansion absorption), Solid wedge, Split wedge
- Trim Options: API Trims 1, 5, 8 (Stellited seats), 10, and 12 with graphite stem packing
Key Features & Applications
- Full-Bore Straight-Through Flow: Eliminates flow turbulence and keeps friction losses to an absolute minimum.
- Integral Backseat Design: Allows stuffing box repacking under pressure when the valve is fully open.
- Robust OS&Y Architecture: Keeps the stem threads out of the process fluid path to prevent corrosion and galling.
- Common Applications: Upstream oil and gas, refineries, petrochemical plants, steam power lines, water distribution networks, and process piping headers.
