Piping Materials : Check Valves

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Check Valves are used to stop reversal of a flow in a piping system, e.g. in discharge of all centrifugal pumps. There are many types of check valves and their selection is based on types of fluids, piping configuration and process parameters.

Index

  1. Swing Check Valve
  2. Lift Check Valve
  3. Ball Check Valve
  4. Piston Check Valve
  5. Stop Check Valve
  6. Tilting Disc Check Valve
  7. Wafer Check Valve
  8. Typical Piping Material Specification

Swing check valve consists of a circular disc which swings on a hinge pin.  This …Read More..

Lift check valve resembles the piston-check valve. It has a guided disc but without a …Read More..

Ball check valve consists of a ball that seats by gravity and/or back pressure , and …Read More..

These valves are much less subject to pounding with pulsating flow due to the intergral …Read More..

Stop check valve can be optionally kept closed either by manual means or automatic means. Main …Read More..

Tilting disc check valve closes rapidly with better closure and less slamming. This makes them …Read More..

Wafer check valve effects closure by two semicircular doors both hinged to a central post …Read More..

Typical Piping Material Specification

Size Range : Small bore and big Bore

Type : Lift check valve for small bore.
Y pattern stop check valve for small bore
Swing check, Tilting Disc Check valve for big bore.
Flanged Stop check valve for big bore

Ends : Socket Welding for small bore. Flanged, for large bore

Pattern : Long pattern for flanged big bore.
Body Material : A105 forged CS small bore, A182 Gr. F304L SS Small Bore Forged, A216 Gr. WCB : Cast CS Big Bore Flanged, A351 Gr. CF3 : Cast 304L Valves

Flanged End Face : Raised Face
Flanged End Rating : 150#, 300# etc. as per spec
SW End Rating : 800#
Dim Std : SW small bore : Manufacturers standard
Flanged big bore : ASME B16.10.
Operator : None, Inclined Handwheel for Y pattern stop check valve SW small bore, Normal handwheel for stop check valve flanged, SW big bore.
Trim : 5 for CS Valves. 10 for SS valves etc.
Datasheet : As per commodity code.

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