Vatac Butterfly Check Valves is one product
similar to the swing type check valve, but with the flap pivoted in front of
its centre of pressure and counterweighted or spring loaded to assume a
normally closed position. When flow is in the forwards direction, the disc
lifts and 'floats' in the stream offering minimum resistance to flow. The disc
is balanced so that as flow decreases, it will pivot towards its closed
position, closing before reverse flow actually commences. The operation is
smooth and silent under most conditions.
Short Disc Stroke provides quick closing and reduces water
hammer, Lift & Tilt Seat Auction preventing or Minimizing wear, Drop tight seating meets or exceeds international standards, Easy
in-line service, Superior tightness, conical, lapped-in hardfaced seating is
self-aligning. Valve can be used even in vertical piping with flow up
Design Standards and Characteristics:
» Design & Manufactured to API 6D, ASME B16.34 or Equivalent.
» P.T Ratings to ASME B16.34
» Face to Face Dimensions to API 6D or ASME B16.34
» Flanged Ends to ASME B16.5
» Valves Marking to MSS SP-25
» Inspect & Tested to API 598 or API 6D
»Sizes Ranges from 2” thru 48”
» Pressure Ratings from Class 150 to Class 600, PN16 to PN100
» Ends Connections in Flanged R.F or RTJ, Wafer
» Structured in Two Piece Bolted Body, One Piece Union
Pressure Sealed Body
» A variety of body and trim material is offered, including carbon steel ASTM A216 WCB,
WCC, Low Carbon Steel
LCB, LCC, Alloy Steel WC6, WC9, C5, Stainless Steel CF8, CF8M, CF3, CF3M,
Duplex & Super Duplex Steel A890 GR. 4A, 5A or F51, Special Materials in
Monel, Alu. Bronze C95800, 95600 etc. Coatings may be provided for added corrosion or wear
resistance. Hard-facing and weld overlays may also be supplied. Seats Options
with metal-to-metal or bubble-tight resilient.
» Optional Bypass system, Dashpot & Counter-weight
Assembly.
Vatac offers Butterfly Check Valves including, but
not limited to
▲ Swing Butterfly Check Valve ▲Lift Butterfly Check Valve
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