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Part No

Where to Use

  • Natural Gas or Instrument Air Supply Lines: Upstream of Pneumatic Instruments or Pneumatically Actuated Equipment
    • Locations With Low Ambient Temperatures
    • Supply Lines With Moisture
    • Valves
      • Emergency Shutdown Valves
      • Control Valves
      • Automated Ball Valve Assemblies
    • Natural Gas Compressor Stations
    • Centrifugal Compressors
    • Reciprocating Compressors
    • Oil Refineries
    • Offshore Production Sites
    • Processing Plants
Filter Condition        

The Welker F-4 Filter Dryer helps to remove aerosols, odorant, and liquid hydrocarbons from gas or instrument air. Add a filter to help reduce line freezing, increase instrument performance, and cut down on maintenance.


  • Spin on filter body
  • Mounting Bracket
  • Filter cartridge media to remove water, liquid, hydrocarbons, mercaptan, and sulfur


  • Simplified cartridge change outs
  • Clean, dry, supply gas
More Information
Product Category : Filtration
Materials of Construction : Buna, Carbon Steel, and PTFE
Maximum Allowable Operating Pressure : 1500 psig @ -20 °F to 120 °F
Seal : Buna
Max Temperature : 200 °F
Inlet Connection : ¼" FNPT
Outlet Connection : ¼" FNPT
Flow Rate : Up to 50 scfm
Weight : 28 lb

Weight and/or dimensions are approximate.

Specifications subject to change without notice.

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