Gas Filter 77

WITT Gas filter 77

Data sheet Quotation request

Gas filter for filtering out mechanical impurities and condensate in pipelines, filter inserts in bronze (5/50 µm) especially for O2 or in Stainless Steel (7/40 µm), for high flow rates

  • increases service life of downstream fittings and equipment
  • high flow rate - owing to flow-maximising design
  • with condensate drain
  • change of filter possible while installed
  • every gas filter 100% tested
  • 72 X 205 mm, approx. 2,8 kg


WITT gas filters for reliable protection against contamination and condensate.


  • ultra-fine filtering out of mechanical impurities through bronze or stainless steel filter inserts
  • broad range of uses – compatible with many technical gases
  • filter inserts in stainless steel with a filtering fineness of 7-10 µm or 40 mµ
  • filter inserts in bronze especially for O2 with a filtering fineness of 5 µm or 50 mµ, according to EIGA
  • change of filter possible while installed due to user-friendly design
  • high flowrate thanks to flow-maximising design
  • condensate can be collected and removed using condensate drain
  • easy to install thanks to large choice of connections
  • reliable filtering performance increases service life of downstream fittings and equipment
  • meets all the requirements of EIGA Guideline IGC Doc 13/12/E “Oxygen Pipeline and Piping Systems“
  • pre-cleaned to EIGA Guideline IGC Doc 13/12/E, and ready for O2
  • withstands maximum line pressure (40 bar) even if it becomes clogged

Operation / Usage:

  • particularly well suited to use in laser systems
  • Gas filter model 77 is designed for installation in pipelines
  • the gas purifiers with condensate drain must be installed vertically


  • the condensate should be drained at regular intervals
  • the filter inserts must be checked regularly and replaced if necessary

Company certified to ISO 9001 and PED 2014/68/EU Module H
CE-marked in accordance with PED 2014/68/EU
Designed for Oxygen Service in accordance with EIGA 13/20 and CGA G-4.4: Oxygen Pipeline and Piping Systems
Cleaned for Oxygen Service in accordance with EIGA 33/18 and CGA G-4.1: Cleaning of Equipment for Oxygen Service


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Gas Filter 77 is used in following areas:


WITT Zentrale

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Headquarters: +49 (0)2302-8901-0
WITT UK: +44 (0)1925 234466

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