41/21 SWING CHECK VALVE
Resilient seated swing check valve with free shaft end for drinking water and neutral liquids to max. 70°C AVK swing check valves provide easy access to maintenance simply by unscrewing a few bolts and lifting the bonnet assembly including shaft and disc out of the body. The disc is fully vulcanized with EPDM rubber and is mounted in a nylon bushing allowing it to move slightly horizontally and vertically to achieve compete tightness. AVK swing check valves are available with closed bushings and with free shaft for mounting of lever and weight/spring.
| General valves |
| Flanged connection (BS EN1092-2) |
| Ductile iron |
| Fusion bonded epoxy coating |
| AVK GUMMI EPDM rubber coated |
| ductile iron disc |
| DN50 – DN300 |
| PN10 PN16 |
| Similar 41/25, 41/30, 41/36, etc. |
Features
Full bore and low head loss.
Shaft of stainless steel fitted in the bonnet allowing easy access to maintenance.
Hinge of acid-resistant stainless steel in DN 50-200 and ductile iron in DN 250-300, tightened around the shaft with bolts to eliminate play and thus ensure durability.
Bonnet gasket of EPDM rubber in a groove between bonnet and body.
Disc with steel insert fully vulcanized with EPDM rubber. Due to its light weight a minimum of force is required to open and close the valve.
The disc is mounted in a nylon bushing, which allows it to move slightly both horizontally and vertically to close completely tight also in case of minor impurities in the seat.
Body and bonnet of ductile iron with epoxy coating to DIN 30677-2
Possible to mount lever and weight for installations with an increased risk of water hammer at standard velocities. The weight is adjustable on the lever to achieve an optimum closing speed and a careful closing against the seat. Can be installed in different positions.
Possible to mount lever and spring to prevent water hammer at high velocities
Optional
Reference nos. and dimensions:
| Related Series | Series/Type | PN class | No. | Description | DN |
|---|---|---|---|---|---|
| 41 | 41/21 | PN16 | 410502101836 | DN050 PN16 BS NO L&W GREY | DN50 |
| 41 | 41/21 | PN16 | 410652101836 | DN065 PN16 BS NO L&W GREY | DN65 |
| 41 | 41/21 | PN16 | 410802101836 | DN080 PN16 BS NO L&W GREY | DN80 |
| 41 | 41/21 | PN16 | 411002101836 | DN100 PN16 BS NO L&W GREY | DN100 |
| 41 | 41/21 | PN16 | 411252101836 | DN125 PN16 BS NO L&W GREY | DN125 |
| 41 | 41/21 | PN16 | 411502101836 | DN150 PN16 BS NO L&W GREY | DN150 |
| 41 | 41/21 | PN16 | 412002101836 | DN200 PN16 BS NO L&W GREY | DN200 |
| 41 | 41/21 | PN16 | 412502101836 | DN250 PN16 BS NO L&W GREY | DN250 |
| 41 | 41/21 | PN16 | 413002101836 | DN300 PN16 BS NO L&W GREY | DN300 |
Downloads
| Datasheet (PDF) | |
|---|---|
| DS41210011609_EN.pdf |  |
| Product Brochure | |
|---|---|
| /downloads/ | |
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