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AVK Universal Under Pressure Tee for Gas

With DN80 - 300 Flanged Branch

AVK UK Gas Sales Andy Hatton

Andy Hatton

National Sales Manager – Gas

Under Pressure Supatee Temperature range : -10° to +70° Insulation essential for temperatures of 0° C and below. Maximum Working Pressure: 7 Bar

The Series 257/31 is a universal under pressure tee for all ferrous pipes, suitable for use with gas.

Variant 257/31-001
Connection: Flanged
Material: Ductile Iron
DN: DN80 - DN300
PN: PN 7

Features

  • Suitable for all ferrous pipe types
  • Extremely versatile - large tolerance range
  • Approved to GIS/LC8 Part 4 and Kitemark™ 517388
  • Allows for a total angular deflection of +/- 4 degrees
  • Slotted branch flange
  • Corrosion resistant construction
  • Fusion bonded epoxy coating
  • Suitable for stoppling
  • Maximum Working Pressure: 7 Bar
  • Embodied Carbon Data Available upon request
  • Options:
    • BS EN 1092-2, BS10 or ANSI flange drillings
    • Branch sizes DN80-300mm
    • For Water version see Series 257/30 datasheet

Downloads

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

Reference nos. and dimensions:

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Ref. no. DN/DN
 DN2
mm		 H3
mm		 H
mm		 L
mm		 W
mm		 Theoretical
weight/kg
257-31-04-081 111.8 - 129.4 80 241 160 216 238 14
257-31-04-101 111.8 - 129.4 100 241 160 216 238 16
257-31-06-081 165.2 - 184.8 80 315 185 220 312 19
257-31-06-101 165.2 - 184.8 100 315 185 220 312 21
257-31-06-151 165.2 - 184.8 150 302 190 285 312 26
257-31-08-081 215.9 - 239.7 80 370 220 220 374 28
257-31-08-101 215.9 - 239.7 100 370 220 220 374 29
257-31-08-151 215.9 - 239.7 150 363 220 320 374 39
257-31-08-201 215.9 - 239.7 200 363 220 340 374 41
257-31-10-081 269.2 - 293.5 80 440 260 220 434 34
257-31-10-101 269.2 - 293.5 100 440 260 220 434 36
257-31-10-151 269.2 - 293.5 150 431 265 370 434 58
257-31-10-201 269.2 - 293.5 200 431 265 370 434 60
257-31-10-251 269.2 - 293.5 250 431 265 370 434 64
257-31-12-081 319.9 - 341.3 80 505 300 270 500 51
257-31-12-101 319.9 - 341.3 100 505 300 270 500 52
257-31-12-151 319.9 - 341.3 150 505 300 285 500 54
257-31-12-201 319.9 - 341.3 200 494 300 420 500 65
257-31-12-251 319.9 - 341.3 250 494 300 420 500 70
257-31-12-301 319.9 - 341.3 300 494 300 455 500 85
Enquiry
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Components

1. Body Ductile iron GJS-450-10
2. Domed cap Plastic
3. Bolt Steel gr. 8.8, zinc plated, passivated
4. Nut Steel gr. 8.8, zinc plated, passivated
5. Washer Steel gr. 8.8, zinc plated, passivated
6. Seal NBR rubber
7. O-ring NBR rubber

Test/Approvals

  • Hydraulic test: 1.5 x PN
  • Approved according to Kitemark™ GIS/LC8-4

Standards

  • Designed according to GIS/LC8-4
  • Standard flange drilling to EN1092 (ISO 7005-2), PN 16
0 Files In the package