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AVK DOUBLE ECC. BUTTERFLY VALVE, SHORT, PN25

IP67 gearbox w. handwheel/pos. ind., SS-shaft, intgr. seat, A2 fasteners

Contact

Pham Trung

Technical Manager

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 756/218-008
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
  • Machined and epoxy coated ductile iron 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

Reference nos. and dimensions:

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AVK ref. 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
756-0150-2-74018014 150 PN25 250 140 6.14 - 192 162 254 58.6 - 277 37
756-0200-2-74018014 200 PN25 250 152 15 25 217 195 287 104 130 277 50
756-0250-2-74018014 250 PN25 400 165 31 41 258 228 332 161 181 306 77
756-0300-2-74018014 300 PN25 400 178 47 58 303 253 368 210 228 306 108
756-0350-2-74018014 350 PN25 400 190 67 73 318 285 392 265 273 306 118
756-0400-2-74018014 400 PN25 400 216 80 86 373 320 435 311 319 306 178
756-0450-2-74018014 450 PN25 600 222 101 107 411 345 503 365 372 461 238
756-0500-2-74018014 500 PN25 600 229 124 130 455 375 564 422 428 461 282
756-0600-2-74018014 600 PN25 700 267 154 160 541 430 632 513 519 517 448
756-0700-2-74018014 700 PN25 700 292 193 199 566 483 706 616 621 570 609
756-0800-2-74018014 800 PN25 700 318 231 237 650 546 789 716 722 570 805
756-0900-2-74018014 900 PN25 700 330 275 281 707 593 839 821 827 570 1021
756-1000-2-74018014 1000 PN25 700 410 286 292 771 663 909 896 902 570 1341
756-1200-2-74018014 1200 PN25 700 470 347 353 899 768 1044 1069 1074 630.5 2175
2D/3D drawings
Enquiry
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Components

1. Key Stainless steel A2
2. Shaft, drive Stainless steel AISI 420
3. Seal housing Bronze
4. O-ring EPDM rubber
5. O-ring EPDM rubber
6. Self-lubricating bearing Bronze/PTFE composite
7. Disc cover Stainless steel
8. Disc cover gasket EPDM rubber
9. Dowel Stainless steel
10. Disc Ductile iron GJS-500-7
11. O-ring EPDM rubber
12. Centre flange Ductile iron GJS-500-7
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
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. Seal retainer ring Steel
28. Disc seal EPDM rubber
29. Screw Stainless steel A2
30. Bolt Stainless steel A2
31. O-ring EPDM rubber
32. Washer Stainless steel A2
33. O-ring EPDM rubber
34. Safety key Stainless steel A2
35. End plate Ductile iron GJS-500-7
36. Gasket EPDM rubber
37. Screw Stainless steel A2
38. Thrust bearing Bronze
39. Screw Stainless steel A2
40. Shaft, stub Stainless steel AISI 420
41. Screw Stainless steel A2
42. Gearbox Cast iron

Test/Approvals

  • Hydraulic test according to EN 1074-1 and -2 / EN 12266
  • Approved for drinking water

Standards

  • EN 593
  • Face-to-face dimension according to EN 558, Series 13
  • Flange drilling EN1092, PN25
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