BUTTERFLY VALVE, DOUBLE ECCENTRIC, LONG, PN25
IP67 gearbox w. handwheel/pos. ind., welded SS seat, SS seal ring/shaft, A2 fasteners
Double eccentric butterfly valve to EN 593 for neutral liquids like drinking water and treated waste water free from solids and fibrous impurities to max 70°C.
AVK double eccentric butterfly valves with tilted disc are designed for easy operation and long service life. The disc seal is made of AVK's drinking water approved EPDM rubber featuring an excellent compression set and ability to regain the original shape. The high quality epoxy coating and fully encapsulated shaft/disc connection ensure optimal corrosion protection and durability
| Variant 756/118-030 | |
|---|---|
| Connection: | Flanged |
| Material: | Ductile iron |
| PN: | PN 25 |
| Closing direction: | Clockwise to Close |
Features
- Double eccentric design releases seal compression after only few degrees of opening resulting in low operating torque
- Disc firmly fixed to the shaft to prevent fluttering and a slight tilt allows for precise adjustment of the closed position
- Disc seal profile and rubber quality ensure low closing torque
- All rubber parts drinking water approved by multiple institutes
- Fasteners in stainless steel, A2
- Stainless steel shaft and seal retainer ring
- Welded stainless steel 309L seat integrated in the body
- All threaded connections are sealed with O-rings for protection against medium and environment
- Radial bearings in self-lubricating PTFE/bronze composite
- Shaft ends DN≤600 fitted with an end cover that keeps the shaft in position against system pressure and seals the disc interior against corrosion
- Shaft ends DN≥700 fully encapsulated in the disc and fixed with O-ring sealed dowels held in place with a security plate. Key and keyway as backup
- Replaceable shaft seals with two EPDM O-rings; gaskets to the exterior in hydrocarbon resistant NBR
- Coated with blue RAL 5017 FBE to DIN 3476, GSK and approved by WRAS-DVGW/W270/UBA, 250µm
Downloads
Datasheet
Certificate(s)
Components
| 1. | Gearbox | Cast iron |
| 2. | Key | Stainless steel A2-70 |
| 3. | Shaft, drive | Stainless steel 1.4021 |
| 4. | Body | Ductile iron EN-GJS-500-7 |
| 5. | Security plate | Stainless steel 1.4301 |
| 6. | Washer | Zinc |
| 7. | Bolt | Stainless steel A2-70 |
| 8. | Disc | Ductile iron EN-GJS-500-7 |
| 9. | Pin | Stainless steel 1.4057 |
| 10. | Shaft, stub | Stainless steel 1.4021 |
| 11. | Bearing | Bronze/PTFE comp. on SS back |
| 12. | End plate | Ductile iron EN-GJS-500-7 |
| 13. | Bolt | Stainless steel A2-70 |
| 14. | Washer | Stainless steel A2-70 |
| 15. | Spacer | Copper alloy |
| 16. | Bearing | Copper alloy |
| 17. | O-ring | EPDM rubber |
| 18. | Gasket | NBR rubber |
| 19. | Seal retainer ring | Stainless steel 1.4301 |
| 20. | Seal ring | EPDM rubber |
| 21. | Bolt | Stainless steel A2-70 |
| 22. | Nut | Stainless steel A2-70 |
| 23. | Welded seat | Stainless steel AISI 309L |
| 24. | Disc cover | Stainless steel 1.4301 |
| 25. | Gasket | EPDM rubber |
| 26. | Blanking flange | Ductile iron EN-GJS-500-7 |
| 27. | Safety key | Stainless steel 1.4021 |
Test/Approvals
- Hydraulic test according to EN 1074-1 and -2 / EN 12266
- Approved according to KIWA Certificate K 6320 (DN ≤ 800)
- Approved for drinking water according to WRAS Certificate No. 2206003, max. 23°C (DN200-600)
Standards
- EN 593
- Face-to-face dimension according to EN 558, basic series 14
- Flange drilling to EN1092, PN25
