API 6D Swing Check Valve, ASTM A217 WC6, 2 Inch, 150 LB, RF

Product Name: API 6D Swing Check Valve
Design Standard: API 6D
Body Material: ASTM A217 WC6
Size: 2 Inch, DN50
Pressure: Class 150 LB, PN20
End Connection: RF Flanged

KOSEN Universal Cast Steel Check Valves are designed and manufactured to comply with international standards such as API 6D, BS 1868, ASME B16.34, or equivalent. They are engineered to minimize flow resistance and pressure drop, making them suitable for horizontal installations only. The lapped and screwed-in seat ring ensures a tight shutoff and long-lasting service life.

The valve's disc is precisely designed, accurately machined, and guided to enable efficient automatic shutoff at zero pressure. The valve features a compact structure and low-emission service. In its standard configuration, the swing check valve has a bolted cover and a free-swinging clapper, which responds to the prevailing flow conditions.

Swing check valves are ideal for horizontal pipeline installations. However, if the disc weight is too heavy, issues like chattering may occur. In such cases, dampers or counterweights should be provided.

Technical Specification

» Nominal Diameter: NPS 2-24 Inch (DN50-DN600)
» Temperature Range: -29°C to 595°C
» Design Pressure: Class 150-2500 LB (PN10-PN420)
» Material: ASTM A216 WCB, WCC, A217 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, EN558 series
» Flanged Connection: ASME B16.5, ASME B16.47, EN1092 series
» Butt Welded End: ANSI B16.25
» Test and Inspection: API 598, ISO 5208, EN12266-1

Product Features

» Cast steel swing check valve prevents backflow in the line. Flow is directed in a straight line through the valve, minimizing pressure drop. The disc swings open as media flows through the line, and back pressure holds the disc in the closed position.
» Installation flexibility: Cast steel swing check valves can be installed in both horizontal and vertical lines, but must be positioned according to the media flow direction, indicated by the flow direction arrow marked on the valve body.
» Accessories: A wide range of accessories, such as bypasses, locking devices, counterweights, and others, are available to meet customer requirements.