Audco Swing Check Valves
Audco Swing Check Valves (manufactured under L&T Valves / Audco) are automatic, non-return valves (NRVs) designed to allow fluid flow in one direction while preventing reverse flow. This protects critical equipment such as pumps, compressors, and heat exchangers from pressure surges and backflow damage.
Technical Specifications
|
Feature |
Specification Details |
|
Size Range |
Forged Steel: ½" to 2" (DN15 – DN50) Cast Steel / Iron: 2" to 48" (DN50 – DN1200) |
|
Pressure Ratings |
ASME Class 150, 300, 600, 900, 1500, and 2500 |
|
Design Standards |
BS 1868, API 6D, API 594, ASME B16.34 |
|
Testing Standard |
API 598 |
|
Face-to-Face Standard |
ASME B16.10 |
|
End Connections |
Flanged (ASME B16.5 / B16.47), Butt Weld (B16.25), Socket Weld, and Screwed (NPT/BSPT) |
|
Temperature Limits |
-29 °C to +425 °C (varies based on body material and trim) |
Material Options
- Carbon Steel: ASTM A216 WCB / WCC (Cast), ASTM A105 (Forged)
- Stainless Steel: ASTM A351 CF8, CF8M, CF3, CF3M
- Alloy Steel: ASTM A217 WC6, WC9
- Trims & Internals: Hardfaced seats (Stellited) with stainless steel hinge pins and discs
Key Features & Applications
- Full-Bore Flow Path: Minimizes flow resistance and lowers pressure drop across the valve.
- Bolted Cover Construction: Allows easy maintenance and inspection in-line.
- Low Maintenance Design: Operates automatically using media velocity and gravity without requiring external actuation.
- Common Industry Applications: Oil & Gas pipelines, power generation plants (boiler feed/steam), chemical processing, refining, and water treatment systems.
