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Scrubber & Knockout Drum Calculator

Gas Conditioning per GPSA and API Standards

Gas Scrubber & Knockout Drum Sizing
Size vertical or horizontal scrubbers and knockout drums for compressor suction protection, fuel gas conditioning, and mist elimination using GPSA and API RP 14E methodology. Calculates vessel diameter, mist eliminator sizing, liquid holdup, and nozzle sizes.

Operating Conditions

Gas Properties

Leave blank to auto-calculate
Expected liquid carryover
Condensate ~40-50, Water ~62

Design Configuration

Design Margins

Additional liquid accumulation
Per API RP 14E (typ 60-100)

Quick Reference

  • Wire Mesh: K = 0.35 (vertical)
  • Vane Pack: K = 0.40-0.50
  • No Internals: K = 0.12-0.18
  • Comp Suction: Min 2 min holdup
  • Flare KO: Size for max relief