Heated Separator

The Exterran Heated Separator efficiently removes liquids from oil and gas streams while also introducing heat to protect production equipment, valves and pipelines from clogging due to the buildup of paraffin. Our standard unit is a horizontal three-phase separator equipped with an internal fire tube and is rated to handle higher pressures than a traditional heater treater, up to 500 psi.

Key Benefits


  • Heat reduces paraffin buildup to keep your production flowing
  • Heat improves separation of water and oil
  • Gas dome allows for higher operating level inside vessel
  • Precision machined mist extractor boosts efficiency


  • Engineered lifting lugs for ease of installation and safety
  • Large inventory and quick delivery allow fast startup
  • Reduce downtime and maintain production with our proven pre-engineered design


  • Added assurance of a warranty that runs 12 months from startup or 18 months from delivery, whichever comes first
  • Prompt, professional service, support and spare parts from local technicians in or near every major oil & gas producing region in the U.S. and numerous areas around the world

How it Works

The production stream first encounters the inlet diverter, which causes initial separation of gas from liquid. The diverted stream flows to the inlet head and around the firetube, where it is heated. As the stream travels the length of the vessel and firetube, the water descends to the bottom of the unit. The oil rises and flows into an oil bucket. As the gas rises into a gas dome, the mist extractor captures smaller entrained liquid particles before exiting the vessel for delivery. Water exits the bottom of the vessel to your storage tanks. Oil exits the bottom of the oil bucket to storage or further processing and gas exits the gas dome.

Standard Features & Options

Standard Features

  • Removable firetube and stack
  • High-efficiency burner and pilot assembly
  • Temperature controller
  • High temperature thermostat shutdown
  • Liquid gauge assemblies
  • Pressure gauge with isolating valve
  • Thermal relief valve
  • Oil and water outlet control valves
  • Oil and water liquid level controllers
  • Flame arrestor
  • Fuel gas scrubber with high-level shutoff and drain
  • Fuel gas regulator


  • Gas back-pressure valve
  • Manway
  • Cleanout connections
  • Assembled skid-mounted unit
  • Vessel insulation
  • Stack high temperature shutdown
  • Internal anti-corrosive coating
  • Burner safety low (BSL) / igniter
  • High liquid level shutdown
  • Low liquid level shutdown
  • Stack arrestor
  • Sour gas service designed and built to NACE standards
  • Customization to meet additional specifications