Steam Jet Exhausters & Thermocompressors — Venturi Products — Northeast Controls Inc.
Northeast Controls Inc.

Venturi Products — Exhausters & Thermocompressors

Steam Jet Exhausters & Thermocompressors

Steam Jet Exhausters · Air Jet Exhausters · Steam Jet Thermocompressors · No Moving Parts

Steam & Air Jet Exhausters

Steam Jet Exhausters

Steam jet exhausters use high-pressure motive steam to create a vacuum by entraining and compressing suction gas. The combined stream is discharged at an intermediate pressure. Used for evacuating vessels, maintaining vacuum in process systems, and removing non-condensable gases from condensers.

Motive Fluid

Steam (any pressure)

Suction

Air, non-condensables, vapors, gases

Vacuum Range

Atmospheric to 1 mmHg absolute (multi-stage)

Discharge

Atmospheric or above

→No moving parts — extremely reliable
→Handles wet, dirty, or corrosive gases
→Available in single and multi-stage configurations
→Stainless steel, carbon steel, and special alloy construction
→Custom designed for specific vacuum and capacity requirements
→ASME Code construction available
→Can achieve vacuums to 1 mmHg absolute with multi-stage designs
→Integral condenser designs available

Air Jet Exhausters

Air or gas jet exhausters using compressed air or gas as the motive fluid to create vacuum. Suitable for applications where steam is not available or where steam contamination of the suction stream is undesirable. Commonly used for evacuating small vessels, sampling systems, and laboratory applications.

Motive Fluid

Compressed air or gas

Suction

Air, gases, vapors

Vacuum Range

Down to 5" Hg absolute typical

Discharge

Atmospheric

→No steam required — uses compressed air or gas
→No contamination of suction stream with steam
→Compact, lightweight design
→Stainless steel construction standard
→Suitable for corrosive suction gases
→Low maintenance — no moving parts

Steam Jet Thermocompressors

Steam Jet Thermocompressors

Thermocompressors (also called steam jet compressors or steam boosters) use high-pressure motive steam to entrain and compress low-pressure steam to an intermediate pressure. The result is a single stream of steam at a pressure between the motive and suction pressures. Thermocompressors recover low-pressure exhaust steam that would otherwise be wasted, improving overall steam system efficiency.

Motive

High-pressure steam (any pressure)

Suction

Low-pressure steam or vapor

Discharge

Intermediate pressure steam

Compression

Compression ratio up to 4:1 typical

→Recovers low-pressure exhaust steam
→No moving parts — no maintenance
→Reduces steam consumption and fuel costs
→Eliminates need for pressure-reducing valves in many applications
→Custom designed for specific motive, suction, and discharge conditions
→Carbon steel, stainless steel, and alloy construction
→ASME Code construction available
→Single-body or multi-body designs

Exhauster Applications

→Vacuum distillation and evaporation
→Condenser evacuation (power plants)
→Vessel evacuation and drying
→Vacuum filtration
→Degassing and deaeration
→Vacuum conveying
→Freeze drying
→Chemical reactor vacuum systems

Thermocompressor Applications

→Reboiler steam supply from exhaust steam
→Dryer steam supply from exhaust steam
→Evaporator steam economy improvement
→Autoclave steam supply
→Heating coil supply from exhaust steam
→Process steam pressure boosting
→Turbine exhaust steam recovery
→Distillation column reboilers

Custom exhauster & thermocompressor design

Provide your motive, suction, and discharge conditions for a custom-engineered solution.

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