• Wafer type check valve
  • Wafer type check valve

Wafer type check valve

Material of wafer check valve:  A105,LF2,WCB,LCB,F304,F304L,F316,F316L,F51,F321,Monel.

Size of wafer check valve:  1inch(DN25) - 48 inch (DN1200)

Pressure of wafer check valve:  150LB(PN10)-2500LB(PN420)

Connection type:  Flange(FF,RF,FM,RTJ) ,wafer.

Kind of drive:  No

Operating temperature :  -100℃ - 600℃

Working medium :  water, gas,oil,Sulfuric acid and hydrochloric acid

Catalogue:

API_594 wafer type check valve.pdf


Introduction wafer check valves:

The wafer type check valve have three types, one type is double plate swing check valves, this type of the check valves have anther name is butterfly check valves,they have two semicircle disc and two spring, the second type is single plate swing check valves, they have one round disc, the face to face is very short for this type of the check valves, the third type is single plate lift check valves, they have one round disc and one spring,  have a solid thermoplastic body with a very thin "wafer" profile that makes them an ideal check valve for applications that require valves with short takeout lengths. Similar in operation to a swing check valve, the wafer check has a solid thermoplastic disc and seat arrangement that performs the check action. In one direction, fluid lifts the disc off of the seat and allows fluid to pass freely. In the opposite direction fluid drives the disc into the seat, creating a seal and preventing fluid from back flowing upstream. Because of its slim profile, wafer style checks are unlikely to clog which makes them ideal for service lines with large debris or solids. Wafer check valves are used in applications where it is essential to ensure fluid flow passes in only one direction. Wafer check valves can be mounted in vertical or horizontal directions, with the only restriction being a minimum back-pressure required to properly seat the check valve. Spring assists and lever and weight mechanisms are available options to assist in closing the valve quicker to reduce water hammer concerns.


double disc check valve

Features:

  • Light Weight, Versatile Design, and 80 to 90% lighter then conventional full body check valve.

  • Reduces pipe supports, simplifies piping, easier, less costly installation.

  • Spring Loaded double door design has low cracking pressure.

  • Disc open 80% to ensure positive closing

  • Materials and trims available for all services within temperature range.

  • Rubber To Metal or Metal To Metal Seat available

  • Neoprene, Buna-N, EPDM, Viton�, Silicon etc.

Standard:
Design Standard API 6D / API 594
Testing Standard API 598
Pressure Class 150# to 300#
End Connection Wafer Type, Flangeless
Suitable To Mount Between
ANSI B 16.5/BS 10 Table/DIN/JIS/IS Flange


Nomeclature:
Body IS 210 GR. FG 200/220
ASTM A 216 GR. WCB
ASTM A 217 GR. WC 1 / WC 6 /WC 9 / WC 11
ASTM A 352 GR. LCB / LC 3
ASTM A 351 GR. CF 8 / CF 8M / CF 3/CF 3M
Disc ASTM A 216 GR. WCB
ASTM A 217 GR. WC 1 / WC 6 /WC 9 / WC 11
ASTM A 352 GR. LCB / LC 3
ASTM A 351 GR. CF 8 / CF 8M / CF 3/CF 3M
Hinge/Stop Pin AISI 410 / 304 / 316 / 304L / 316L
Seat (Moulded) Neoprene / Nitrile / Buna-N/ NBR / EPDM /Silicon / Viton
Spring : S.S. 304 / 316 / 304L / 316 L
Lifting Hook : C.S. / S.S 304 / 316

lift type wafer Check Valve

Lift type  Check Valves feature a wafer type, compact and rugged cast steel design and are suitable for any process liquid, air, gas, steam etc. Disc check valves are opened by the pressure of fluid and closed through compression spring as soon as flow stops thus preventing reverse flow.

Advantage of these check valve is they can be mount between pipe flanges in any direction. Body Seat available in Metal-to-Metal and Soft seat also.


wafer type check valve
Compact & Rugged Design
FEATURES:

Less Weight
Easy To Installation
Maintenance Free
Zero Leakage (In Soft Seat)


Standard:
Design Standard DIN EN 558-2
Testing Standard DIN 3230 / API 598
End Connection Wafer Type, Flangeless
Suitable To Mount Between
ANSI B 16.5/BS 10 Table/DIN/JIS/IS Flange
Rating 150# to 300#
Size Range 15MM to 100MM


Nomenclature:
Body ASTM A 216 GR. WCB
ASTM A 351 GR. CF 8 /CF 8M / CF 3 / CF 3M
Star Guide : ASTM A 216 GR. WCB
ASTM A 351 GR. CF 8 /CF 8M / CF 3 / CF 3M
Seat Metal To Metal � Integral Body 朣.S. 304/316/304L/316L
Soft Seat � P.T.F.E./Neoprene/EPDM/Nitrile/Buna-N/Silicon/Viton
Disc ASTM A 351 GR. CF 8 /CF 8M / CF 3 / CF 3M
Spring : S.S. 304 / 316 / 304L / 316L


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