| Message: | NSV High Pressure with PSC Swing check valves, like all check valves, are used to which allow fluid to flow in one direction but prevent it from flowing in the other, are available in
a wide range of styles. Swing valves, because of their less controlled opening and closing
mechanics, are used in less sensitive applications.
Applicable Standard
Design Standard: BS 1868, ASME B16.34, API 6D, DIN2533
Face to Face: ASME B16.10, API 6D, EN 558, DIN 3202
End Flange: ASME B16.5, ASME B16.47, DIN2501, DIN2533
Butt welding Ends: ASME B16.25, DIN3239
Inspection and Test: API 598, DIN3230
Products Range
Size: 2" ~ 24" (DN50 ~ DN600)
Rating: ANSI 2500lb
Body Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel
Trim: Per API 600
Design Features
Full open design
PSC(Pressure Seal Cover)
Swing type disc design
Renewable or and welded seat
Flanged or butt welding ends
Advantage&Disadvantage
The primary benefit of swing check valves is their ability to allow a full, unobstructed flow— which is particularly important in piping systems that may require line cleaning. Swing check valves are also ideal for use in low cost systems with manual valves, such as gate valves in common use.
Disadvantages include a high rate of wear due to the rotation about the hinge pin and the requirement for full and precise alignment of the disc and seat upon closing. The limitations of this design restrict their use in pulsating systems with intentionally cyclic pressures, as the constant pulsating action of the valve leads to premature wear url:http://www.nsvvalves.com |
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