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AVK GATE VALVE FOR ACTUATION, PN 16, CTC

DN50-400 Clockwise to Close and Clockwise to Open

Mamoun Humayra, AVK UK Product Manager - Water

Mamoun Humayra

Water Product Manager

Resilient seated gate valve to BS EN 1074-2 for water and waste water. Temperature range: -10° C to +70° C. Max 10% solid matter. Insulation essential for temperatures of 0° and below.

The Series 21/78 is a resilient seat, wedge gate valve with an ISO mounting gland flange for the safe and cost effective fitting of gearboxes and actuators. Suitable for use with water and neutral liquids, to a maximum temperature of +70°C.

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Variant 21/78-001
Connection: Flanged
Material: Ductile Iron
DN: DN50 - DN400
PN: PN 16

Features

  • ISO flange gland version for gearbox and actuator mounting.
  • Ductile iron wedge, fully vulcanized with EPDM rubber.
  • O-ring stem seals replaceable under pressure.
  • Corrosion resistant construction, ductile iron coated with WRAS approved epoxy coating Blue RAL 5017, to 250 microns min. Holiday free in accordance with WIS 04-52-01.
  • Body, bonnet and gland bolts sealed with hot melt.
  • Lifting bars - see safety note below.
  • Sizes DN50-150 have ISO mounting flange F10 only.
  • Sizes DN200-400 ISO mounting flange is double drilled F10/F14.
  • Options:
  • Electric actuation.
  • Bevel or spur gearboxes.
  • Alternative flange drilling.
  • Safety Note:
    • The valves now accommodate lifting bars for the safe handling of valves. These lifting bars are rated to the weight of the bare valve and stem cap (where fitted) only and should not be utilised if the valve is fitted with pipe, mechanical pipe joints, gearboxes, actuators or any other external fitment. AVK will not accept any responsibility for loss or damage if the lifting bars are not used in strict accordance with this guidance.

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Price list
Related Datasheets
Datasheet
Installation, Operation & Maintenance
Certificate(s)

Reference nos. and dimensions:

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Ref. no. DN
mm		 Operating
Direction		 H3
mm		 H
mm		 H1
mm		 L
mm		 D2
mm		 W
mm		 Torque
Nm		 Theoretical
weight/kg
21-050-78-1140069 50 CTO 310 228 190 178 20 165 95 11
21-065-78-0140069 65 CTC 341 228 248 190 20 185 60 13
21-080-78-0140069 80 CTC 384 284 237 203 23 200 90 17
21-080-78-1140069 80 CTO 384 284 237 203 23 200 90 17
21-100-78-0140069 100 CTC 422 312 265 229 23 220 90 22
21-100-78-1140069 100 CTO 422 312 265 229 23 220 90 22
21-150-78-0140069 150 CTC 551 408 359 267 23 285 150 40
21-150-78-1140069 150 CTO 551 408 359 267 23 285 150 40
21-200-78-0140069 200 CTC 678 508 462 292 23 340 130 55
21-200-78-1140069 200 CTO 678 508 462 292 23 340 130 55
21-250-78-0140069 250 CTC 776 576 531 330 23 400 120 84
21-250-78-1140069 250 CTO 776 576 531 330 23 400 120 84
21-300-78-0140069 300 CTC 880 652 607 356 23 455 100 122
21-300-78-1140069 300 CTO 880 652 607 356 23 455 100 122
21-350-781140069 350 CTO 880 652 607 356 23 455 200 122
21-400-78-0140069 400 CTC 880 652 607 356 23 455 250 223
21-400-781140069 400 CTO 880 652 607 356 23 455 250 223
3D drawings
Enquiry
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Components

1. Body Ductile Iron GJS-500-7
2. Bonnet Ductile Iron GJS-500-7
3. ISO flange Ductile Iron GJS-500-7
4. Stem Stainless steel 1.4401
5. O-ring NBR rubber
6. Bushing PA
7. Thrust collar DZR brass
8. O-ring NBR rubber
9. Seal Hot melt glue
10. Bolt Steel gr. 8.8, zinc plated, passivated
11. Key Stainless steel A4
12. Bolt Steel gr. 8.8, zinc plated, passivated
13. O-ring NBR rubber
14. Bonnet gasket EPDM
15. Wedge nut DZR brass
16. Wedge core Ductile iron
17. Wedge shoe PA
18. Wedge rubber EPDM
19. Coating Epoxy

Test/Approvals

  • Hydraulic test according to EN 1074-1 and 2 / EN 12266.
  • Seat: 1.1 x PN. Body: 1.5 x PN. 
  • Approved according to WRAS
  • Drinking Water Inspectorate Regulation 31 compliant

Standards

  • Designed according to BS EN 1074 -1 and 2
  • Face to face according to EN 558 Table 2 Basic Series 3
  • Standard flange drilling to EN1092 (ISO 7005-2), PN 16
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