Non-slam Check Valve

In applications where forward flow can very quickly turn into reverse flow, is high system decelerations, non-slam check valves are essential. Non-slam check valves are designed to react to the high deceleration rates by closing very quickly, prior to the reverse velocity reaching damaging levels. With a combination of a lightweight closure member, spring assistance and a very short amount of disc travel, the Non-Slam Axial Check Valve is extremely responsive, closing in a fraction of a second. This ensures that reverse velocity does not increase to levels that can cause surge damage or reverse flow though pumps and compressors, both of which can be very costly to the user.

The axial Check Valve is available in 2 closure member designs dependent on size. Solid disc for sizes 1" through to 10" and the Ring disc design in sizes 12" and above. The axial design uses no soft parts and is therefore inherently fire-safe. Also as there are no wearing parts, it is maintenance free. The springs are sized according to the flow rates to ensure that the valves are in the fully open position during normal use. This minimises cycling of the spring, giving the valves a long design life without regular maintenance.

The Fangwen Non-slam Check Valves are designed and manufactured strictly to International Standards API 6D, ASME B16.34, DIN 3202, or equivalents, Featured with compact structure & Tight shut off service.

Fangwen Non-slam Check Valves are specifically designed for fast-reversing systems where backflow is a constant concern. In such critical service applications, Fangwen Non-slam Check Valves offer the following benefits.

◆ Minimizes the damaging effects of water hammer in fluid systems

◆ Removal of chatter associated with conventional valves in reciprocating compressor service

◆ Protects rotating equipment from damage due to flow reversal

◆ Minimizes pressure loss in piping systems

◆ Provides quick dynamic response reducing reverse velocity

All Non-slam Check Valves manufactured and supplied by Fangwen are with the following features:

» Design & Manufactured to API 6D, API 594, ASME B16.34 or Equivalent ◆ P.T Ratings to ASME B16.34

» Face to Face Dimensions to API 6D Standard or Short Pattern ◆ Wafer Ends to API 594

» Valves Marking to MSS SP-25

» Inspect & Tested to API 598 or API 594

» Sizes Ranges from 2” thru 60”

» Structured in One Piece Union Body

» Pressure Ratings from Class 150 to Class 2500, PN16 to PN420

» Ends Connections in Wafer

» A variety of body and trim material is offered, including carbon steel ASTM A216 WCB, WCC, A105, Low Carbon Steel LCB, LCC, LF2, 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 & Counter-weight Assembly.

Fangwen offers Non-slam Check Valve including, but not limited to

▲ Cast Non-slam Check Valve ▲ Forged Non-slam Check Valve

Forged Non-slam Check Valve

Features

» Design & Manufactured to API 6D, API 594, ASME B16.34 or Equivalent ◆ P.T Ratings to ASME B16.34

» Face to Face Dimensions to API 594

» Valves Marking to MSS SP-25

» Inspect & Tested to API 598 or API 6D

» Sizes Ranges from 2” thru 60”.

» Structured in One Piece Union Body

» Pressure Ratings from Class 150 to Class 2500, PN16 to PN420

» Ends Connections in Wafer

» A variety of body and trim material is offered, including carbon steel A105, Low Carbon Steel LF2, Alloy Steel F11, F22, F5, Stainless Steel F304, F316, F304L, F316L, Duplex & Super Duplex Steel F51, F53, Special Materials in Monel, Alu. Bronze B61, B62 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 & Counter-weight Assembly.

The Fangwen Cast Non-slam Check Valves are designed and manufactured strictly to International Standards API 6D, API 594, DIN 3202, or equivalents, Featured with compact structure & Tight shut off service.