AVK GATE VALVE, FLANGED, PN25
Resilient seat PN25 gate valve to BS standard with replaceable stem seal and stainless steel stem. For drinking water and other neutral liquids to max. 70°C
AVK gate valves are designed with built-in safety in every detail. The wedge is fully vulcanized with AVK’s own drinking water approved EPDM rubber compound. It features an outstanding durability due to the ability of the rubber to regain its original shape, the double bonding vulcanization process and the sturdy wedge design. The triple safety stem sealing system, the high strength stem and the thorough corrosion protection safeguard the unmatched reliability.
| Variant 21/60-004 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile iron |
| DN: | DN50 - DN400 |
| PN: | PN 25 |
| Closing direction: | Clockwise to Close |
Features
- Fixed, integral wedge nut prevents vibration and ensures durability
- Wedge fully vulcanized with drinking water approved EPDM rubber
- Wedge shoes in PA and guide rails on the body make the wedge slide easily up and down, even with high differential pressure
- Designed for heavy duty BS EN1074-2, type B
- A large conical stem hole going all the way through the wedge ensures circulation and prevents stagnant water
- Stainless steel stem with rolled threads for high strength
- Full circle thrust collar keeps the stem firmly lined up and ensures low operating torque
- Triple safety stem seal with an NBR wiper ring outermost to protect against contamination from outside, in the middle two O-rings around the replaceable radial bearing, and innermost an O-ring is the main seal to the system pressure
- Bonnet gasket in EPDM with a circular cross-section and fixed in a recess to avoid blow-out
- Counterbored bonnet bolts, sealed with hot-melt and encircled by the bonnet gasket
- Full bore
- Fusion bonded epoxy coating, 250µm, to DIN 3476
Reference nos. and dimensions:
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| AVK ref. no. | DN mm |
L mm |
H mm |
W mm |
F mm |
Theoretical weight/kg |
|---|---|---|---|---|---|---|
| 21-050-60-074 | 50 | 178 | 279 | 165 | 19 | 17 |
| 21-065-60-074 | 65 | 190 | 288 | 185 | 19 | 18 |
| 21-080-60-074 | 80 | 203 | 294 | 200 | 19 | 18 |
| 21-100-60-074 | 100 | 229 | 324 | 235 | 19 | 29 |
| 21-150-60-074 | 150 | 267 | 429 | 300 | 24 | 51 |
| 21-200-60-074 | 200 | 292 | 531 | 360 | 27 | 81 |
| 21-250-60-074 | 250 | 330 | 614 | 425 | 27 | 140 |
| 21-300-60-074 | 300 | 356 | 690 | 485 | 27 | 188 |
| 21-350-60-074 | 350 | 381 | 814 | 573 | 32 | 296 |
| 21-400-60-074 | 400 | 406 | 867 | 620 | 32 | 320 |
Enquiry
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Components
| 1. | Body | Ductile iron GJS-500-7 |
| 2. | Wedge core | Ductile iron GJS-500-7 |
| 3. | Wedge rubber | EPDM rubber |
| 4. | Wedge nut | Brass DZR CW626N |
| 5. | Stem | Stainless steel AISI 420 |
| 6. | Bonnet bolt | Steel gr. 8.8, zinc plated |
| 7. | Bonnet gasket | EPDM rubber |
| 8. | Bonnet | Ductile iron GJS-500-7 |
| 9. | Seal | Hot melt glue |
| 10. | O-ring | NBR rubber |
| 11. | Thrust collar | Brass DZR CW602N |
| 12. | O-ring | NBR rubber |
| 13. | Gland flange | Ductile iron GJS-500-7 |
| 14. | Radial bearing | Polyamide |
| 15. | O-ring | NBR rubber |
| 16. | Wiper ring | NBR rubber |
| 17. | Gland flange bolt | Steel gr. 8.8, zinc plated |
Test/Approvals
- Seat: 1.1 x PN (in bar), Body: 1.5 x PN (in bar). Operation torque test
- WRAS approved materials
Standards
- EN 1074-2 Annex B (BS5163/Type B)
- Face-to-face dimension according to EN 558, Series 3
- Flange drilling EN1092, PN25
