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LF Bolt style

MDC Europe ISO KF and ISO LF tube fittings are convenient building-block components. They offer great flexibility in the design and construction of high vacuum systems. All fittings are fabricated from 304 stainless steel drawn and welded vacuum tubing. Flanges do not need to be rotatable since they are completely symmetric. If desired, rotatable bolt ring assemblies can be retrofitted to existing claw-clamp style flanges to add bolt holes to ISO LF fittings.

Reducers are used for a change in size of flanges within a single method of sealing, such as elastomer sealing of ISO KF and LF flanges.

Note: Zero-length reducers are not possible with ISO style flanges.

  • High vacuum rated to 1x10-8 mbar
  • Temperature rated to 200ºC maximum
  • Symmetric, non-rotatable geometries
  • Rotatable bolt rings available for LF sizes
  • Viton® or Buna-N® O-rings
  • Standard matte finish
  • ISO compatible design range of KF and LF sizes
  • DN63LF through to DN500LF sizes
  • Requires bolts - see individual flange size
  • Custom lengths available on request

Half nipples > LF Bolt style

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 Flanges 304ss
 Finish Standard matte Finish
 Fittings Leak Test 2x10-10 cc/sec of He
Temperature range Minimum Intermittent Sustained
Viton® -20°C 200°C 150°C
Buna-N® -20°C 100°C 80°C
Silicone -50°C 100°C 150°C
Weight and dimensions See table  
For conversion tables click here

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