Slug Catchers

WellFlex Slug Catcher helps process large bursts of liquids entering your gas inlet stream from pipeline pigging operations where large volumes of liquid can collect in the pipeline and are pushed through in a short time. The unit has a liquid level controller and liquid outlet control valve, as well as a emergency dump connection. This connection allows you the option of adding an emergency level controller and secondary liquid outlet to dispose of sudden large slugs.

How It Works

The production stream first encounters the inlet diverter, which causes initial separation of gas from liquid. The heavier liquid descends while the gas rises. In the open area of the vessel, the stream slows even further and the larger liquid particles fall from the gas. Next the high efficiency mist extractor captures smaller liquid particles entrained in the gas. If a large liquid slug enters the system, an optional dump valve is triggered to quickly handle the sudden influx. Liquids exit the bottom of the vessel and the natural gas exits the top.

Standard Features

  • Level controller and liquid outlet
  • Emergency dump level control connection
  • Emergency dump liquid outlet connection
  • Thermal pressure relief valve
  • Sight glass/level gauges with gauge cocks
  • High efficiency vane mist extractor
  • Liquid level controller
  • Liquid outlet control valve
  • Pressure indicator with isolating valve
  • Temperature indicator connection
  • Instrument gas supply drip pot with high and low pressure regulators
  • Liquid drain connection
  • Instrument gas header including high and low pressure regulators
  • Engineered lifting lugs for safe handling
  • High quality enamel paint system
  • ASME code stamped and National Board registration


  • Emergency dump level controller
  • Emergency dump liquid outlet control valve
  • API 14C rated
  • High and low level controls
  • Skid mounted with drain pan
  • Manways and cleanouts
  • Carbide trim
  • Sour gas service designed and built to NACE standards
  • Customization to meet additional specifications