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AVK CENTRIC WAFER BUTTERFLY VALVE, PN6/10/16

Loose EPDM liner for high temperature, with single acting pneumatic actuator, DN25-900

AVK headquater in Skovby Galten, Denmark

Contact

AVK International A/S

Bizonvej 1, Skovby, 8464 Galten, Denmark

Centric butterfly valve with loose liner and single acting pneumatic actuator - Wafer for wastewater treatment and HVAC to max. 130° C

AVK centric butterfly valves with loose liner are available in wafer, lug and U-section design with a wide standard range of actuators. The butterfly valves are designed with square driven anti-blowout shaft and slim disc of acid-resistant stainless steel with machined and polished disc edges resulting in low torques. 

Variant 820/00-016
Material: Ductile iron/ 1.4408 disc
DN: DN25 - DN900
PN: PN16
Closing direction: Clockwise to Close

Features

  • Ductile iron with long neck for insulation
  • Loose liner of EPDM for high temperatures with integrated gasket faces and “saw profile” for optimum grip in body
  • Square driven anti-blowout shaft in one-piece design up to DN 400, and from DN 450 with key and keyway in two-piece stub design with two self-lubricating bearings
  • Slim disc of acid-resistant stainless steel with machined and polished edges reducing the friction between liner and disc
  • Low operating torques allowing use of cost-effective actuators
  • 200 μ epoxy coating up to DN 400, 250 μ polyurethane from DN 450, optionally other coatings
  • According to PED 97/23/EC appendix 1
  • Mounted with a single acting pneumatic actuator: Up to DN 450: Body of extruded aluminum with ALODUR® corrosion protection. Anodized and polyester coated end caps. Honed cylinder surface and symmetric rack and pinion design for long service life. One-piece blow-out proof nickel-plated drive shaft with bearing guided one-piece pinion. High quality bearings and seals for low friction and a wide operating temperature range. All screws of stainless steel. According to EN ISO 5211, VDI/VDE 3845, NAMUR and ATEX (Directive 94/9/CE). From DN 500: Scotch yoke actuator designed to provide a quarter-turn movement for either on/off or modulating duty. Body of 225 μm polyurethane coated carbon steel. A chromium plated alloy steel thrust bar supports the transverse loads of the scotch yoke. Inside nickel-plated cylinders and bronze sliding blocks on the torque arm ensure minimum friction. A dynamic floating piston seal reduces friction and avoids stick-slip effect after prolonged periods without operation. According to IEC IP66M/67M for environmental protection, PED 97/23/EC and ATEX94/9/EC.

Downloads

Datasheet
Installation
Appendix
Animation
AVK_Centric_butterfly_valve.mp4

Reference nos. and dimensions:

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AVK ref. no. DN
mm		 Product
PN Class		 L
mm		 L2
mm		 H2
mm		 W2
mm		 W3
mm		 W
mm		 W1
mm		 Theoretical
weight/kg		 Notes
820-0025-00-02020160006 25 PN16 30 101 51 110 232 105 204 4.8
820-0032-00-02020160006 32 PN16 30 101 51 110 232 105 204 4.8
820-0040-00-02020160006 40 PN16 33 108 54 130 252 105 204 5.4
820-0050-00-02020130006 50 PN10 43 120 72 135 270 119 241 7.7
820-0065-00-02020130006 65 PN10 46 138 82 150 285 119 241 8.3
820-0080-00-02020120006 80 PN 6 46 142 92 160 295 119 241 8.7
820-0100-00-02020120006 100 PN 6 52 162 102 180 327 131 259 12
820-0125-00-02020120006 125 PN 6 56 189 120 195 370 149 304 18
820-0150-00-02020120006 150 PN 6 56 214 133 210 385 149 304 19
820-0200-00-02020120006 200 PN 6 60 270 163 240 447 183 395 31
820-0250-00-02020120006 250 PN 6 68 324 196 279 550 223 473 55
820-0300-00-02020120006 300 PN 6 78 378 232 315 586 223 473 64
820-0350-00-02020120006 350 PN 6 80 425 257 330 679 284 605 112
820-0400-00-02020120006 400 PN 6 102 475 292 365 745 319 710 154
820-0450-00-02060021006 450 PN 6 113 538 355 397 857 418 855 263 250 my PUR coating on body
820-0500-00-02060021006 500 PN 6 126 595 393 437 915 393 1573 440 250 my PUR coating on body
820-0600-00-02060021006 600 PN 6 153 695 464 522 1020 423 1583 570 250 my PUR coating on body
820-0700-00-02060021006 700 PN 6 168 800 503 565 1148 448 1596 749 250 my PUR coating on body
820-0800-00-02060021006 800 PN 6 190 908 577 627 1288 518 2043 1138 250 my PUR coating on body
820-0900-00-02060021006 900 PN 6 204 1015 643 696 1357 518 2043 1130 250 my PUR coating on body
2D/3D drawings
Enquiry
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Components

1. Bolt Stainless steel A2
2. Washer Stainless steel A2
3. O-ring NBR rubber
4. Shaft Stainless steel 420
5. Body Ductile iron GJS-400-15 (GGG-40)
6. Liner EPDM, high temp.
7. Disc Stainless steel 316

Test/Approvals

  • Hydraulic test according to EN 12266-1, P10/P12
  • Approved for wastewater / pressure test EN12266-1

Standards

  • Designed according to EN 593
  • Face-to-face dimension according EN 558 - Series 20
  • End connection to EN1092-2 PN6/10/16, AS2129 TabD/E,ASME B16.1 CL150
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