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AVK DOUBLE ECC. BUTTERFLY VALVE, LONG, PN25

IP67 gearbox w. handwheel/pos. ind./SS shaft & bolts, SS seat/seal ring/SS-4057 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 756/100-772
Connection: Flanged
Material: Ductile iron
DN: DN150 - DN1200
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
  • Replaceable seat ring in stainless steel pressed into the body (DN≤600) or fixed with bolts (DN≥700) and sealed with an O-ring
  • 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
Appendix
Certificate(s)
Installation, operation and maintenance manuals
Animation
AVK butterfly 756 2024.mp4

Reference nos. and dimensions:

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Reference no. DN
mm		 Flange
drilling		 D
mm		 L
mm		 L1
mm		 L2
mm		 H2
mm		 W1
mm		 W2
mm		 W3
mm		 W4
mm		 W5
mm		 Theoretical
weight/kg
756-0150-1-7400009 150 PN25 300 210 - - 192 162 254 - - 282 38
756-0200-1-7400009 200 PN25 250 230 - - 226 190 288 - - 277 57
756-0250-1-7400009 250 PN25 400 250 - - 268 223 333 - - 306 92
756-0300-1-7400009 300 PN25 400 270 1 12 303 253 368 17 115 306 117
756-0350-1-7400009 350 PN25 400 290 19 25 331 288 393 155 176 306 151
756-0400-1-7400009 400 PN25 400 310 34 40 373 320 435 217 234 306 190
756-0450-1-7400009 450 PN25 600 330 48 54 411 345 503 270 285 461 258
756-0500-1-7400009 500 PN25 600 350 63 69 454 375 546 325 338 461 306
756-0600-1-7400009 600 PN25 700 390 92 98 541 430 632 424 435 449 484
756-0700-1-7400009 700 PN25 700 430 124 130 566 483 706 527 537 570 665
756-0800-1-7400009 800 PN25 700 470 155 161 650 546 815 626 635 570 873
756-0900-1-7400009 900 PN25 700 510 185 191 701 593 865 721 729 570 1129
756-1000-1-7400009 1000 PN25 700 550 216 222 771 663 935 813 824 570 1426
756-1200-1-7400009 1200 PN25 700 630 268 272 899 768 1031 982 987 631 2308
2D/3D drawings
Enquiry
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Components

1. Key Stainless steel A2
2. Shaft, drive Stainless steel AISI 431
3. Seal housing Bronze
4. O-ring EPDM rubber
5. O-ring EPDM rubber
6. Self-lubricating bearing Bronze/PTFE comp. on SS back
7. Disc cover Stainless steel
8. Disc cover gasket EPDM rubber
9. Dowel Stainless steel
10. Disc Ductile iron GJS-500-7 (GGG-50)
11. O-ring EPDM rubber
12. Centre flange Ductile iron GJS-500-7 (GGG-50)
13. Security plate Stainless steel
14. Screw Stainless steel A2
15. O-ring EPDM rubber
16. Spring washer Stainless steel A2
17. Washer Zinc
18. O-ring EPDM rubber
19. Body Ductile iron GJS-500-7 (GGG-50)
20. Nut Stainless steel A2
21. Washer Stainless steel A2
22. Bolt Stainless steel A2
23. O-ring EPDM rubber
24. Washer Stainless steel A2
25. O-ring EPDM rubber
26. Bolt Stainless steel A2
27. Screw Stainless steel A2
28. Seal retainer ring Stainless steel AISI 420
29. Disc seal EPDM rubber
30. Body ring Stainless steel AISI 420
31. Screw Stainless steel A2
32. O-ring EPDM rubber
33. Bolt Stainless steel A2
34. O-ring EPDM rubber
35. O-ring EPDM rubber
36. Washer Stainless steel A2
37. Safety key Stainless steel A2
38. End plate Ductile iron GJS-500-7 (GGG-50)
39. Gasket EPDM rubber
40. Screw Stainless steel A2
41. Thrust bearing Bronze
42. Screw Stainless steel A2
43. Shaft, stub Stainless steel AISI 431
44. Screw Stainless steel A2
45. Gearbox Cast iron

Test/Approvals

  • Hydraulic test according to EN 1074-1 and -2 / EN 12266
  • Approved according to DIN-DVGW Certificate NW-6201BR0451 (DN ≤ 1200)
  • Approved according to KIWA Certificate K 6320 (DN ≤ 800)
  • Approved for drinking water according to WRAS Certificate No. 2206003, max. 23°C (DN200-600)
  • Approved for drinking water according to WRAS Certificate No. 2307007, max. 23°C (DN700-1200)

Standards

  • EN 593
  • Face-to-face dimension according to EN 558, series 14
  • Flange drilling EN1092, PN25
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