Check valves are required to permit forward flow and prevent reverse flow. This is achieved through linear or rotary (angular) motion of a closure member which is kept open by the flowing fluid.
when the flow is reduced towards zero, or reversed, the closure member is moved against its seat by forces due to gravity, supplementary springs, and back pressure.
The self-acting principle of check valves introduces dynamic response as well static (flow configuration) considerations which must be studied in accordance to informed operating conditions.
|Valve Design||Flanged, Welded, Threaded Ends|
|Construction||Bolted, Wafer, Lug|
|Trim Design||Swing or Piston or Needle or Plate|
|Size||½" - 28"|
|Pressure Range||150# - 4500#|
|Bore||Conventional or Reduced|
|Materials||Carbon Steel, Stainless Steel|
Conform To NACE MR 01-75
|Material Status||Forged or Cast|
|Seats||Metal or Resilient|