API 6D Check Valve, ASTM A216 WCB, 16 Inch, 150 LB, RF Ends

The  API 6D Check Valve Manufacturer specializes in producing high-quality swing check valves. These valves are designed to meet API 6D standards and are made from ASTM A216 WCB cast carbon steel, ensuring durability and strength. The valves have a nominal diameter of 16 inches (DN400) and are rated for Class 150 LB and PN20 pressure classes. They feature RF flanged ends for secure and reliable connections. These valves are ideal for applications in gas and liquid pipelines, water and steam systems, cooling towers, and water treatment facilities.

Product Name: API 6D Check Valve
Type: Swing Check Valve
Design Standard: API 6D
Body Material: ASTM A216 WCB
Size: 16 Inch, DN400
Pressure: Class 150 LB, PN20
End Connection: RF Flanged
Medium: Water, Oil, Gas, etc
Temperature Range: -29°C to 595°C

Universal Cast Steel Check Valves are meticulously designed and manufactured in strict compliance with international standards such as API 6D, BS 1868, ASME B16.34, or their equivalents. These valves are engineered to minimize flow resistance and pressure drop, ensuring optimal performance. They are specifically designed for horizontal installation, with a lapped and screwed seat ring that guarantees a tight seal and long-lasting service. The valve's disc is precisely designed and machined to achieve efficient automatic shut-off at zero pressure, featuring a compact structure and low-emission service. In its standard configuration, the swing check valve includes a bolted cover and a free-swinging clapper, which acts as the closing member and responds to flow conditions. While swing check valves are ideal for horizontal pipelines, heavier discs may cause chattering issues. In such cases, dampers or counterweights are recommended to mitigate these effects.

Technical Specification

» Type: Swing Check Valve
» Nominal Diameter: NPS 2-24 Inch (DN50-DN600)
» Design Pressure: Class 150-2500 LB (PN10-PN420)
» Material: ASTM A216 WCB, WCC, 217 WC6, WC9, C5, C12A, A352 LCB, LCC, A351 CF8, CF8M, CF3M, CF8C
» End Connections: Flanged (FF, RF, RTJ) to international standards
» Design and Manufacture: BS 1868, API 6D, DIN 3352
» Face to Face (End to End): ANSI B16.10, EN 558 series
» Flanged Connection: ASME B16.5, ASME B16.47, EN 1092 series
» Butt Welded End: ANSI B16.25
» Test and Inspection: API 598, ISO 5208, EN 12266-1

Structural Diagram

Product Features

» Backflow Prevention: Cast steel swing check valves are designed to prevent backflow in pipelines. The flow travels in a straight line through the valve, resulting in minimal pressure drop. The disc swings open as the media flows through, and back pressure holds the disc closed when flow reverses.
» Flexible Installation: These valves can be installed in both horizontal and vertical lines. However, they must be positioned correctly according to the flow direction, as indicated by the arrow marked on the valve body.
» Customizable Accessories: A range of accessories, including bypasses, locking devices, counterweights, and more, are available to meet specific customer requirements.