Double Acting Gas Booster Power Unit

A reciprocating, positive displacement gas pump with a directly coupled, integral linear reciprocating air motor. As a Standard Gas Power Unit (GPU), it responds to customers’ needs for pre-engineered and user-friendly Gas Booster systems.

Hydratron Double Acting Air Driven Gas Booster

is a reciprocating, positive displacement gas pump with a directly coupled, integral linear reciprocating air motor, designed to generate high-pressure gas output.

With double-acting models, the pressure increase is made possible by means of the area ratio between the larger diameter air drive piston directly connected to two smaller diameter gas pistons having the same diameter as each other. The reciprocating action of the gas booster draws gas at low pressure into the booster then displaces the gas at a higher pressure output from the booster into a closed system. On double acting models, the inlet gas pressure is used to provide additional energy allowing greater output pressures and higher flow rates to be achieved.

The Double-Acting Gas Booster Power Unit can be provided as a pump only system.


Hydratron Double Acting Air Driven Gas Boosters offer many desirable features:

  • Ability to stall at a predetermined pressure and hold this fixed pressure without consuming power or generating heat
  • No risk of flame or spark
  • Infinitely variable speed/output flowrate control
  • Infinitely variable output pressure control
  • Easy to apply automatic controls
  • Standard models are suitable for Air, Nitrogen & Helium. Design options are available for more hazardous gases
  • No limit or adverse effects in continuous stop/start applications
  • Proven reliability, easy to maintain and robust
Feature Icon - High Pressure

5,700 to 21,000 PSI

Feature Icon - Easy Maintenance

Easily Maintained

Icon - Gas

Air, Nitrogen, Helium & Other Gases Applications

Icon - Controls

Simple to set automatic controls

Feature Icon - Frames

Made of Quality Materials

Multiple Pressures Available

Models For All Pressures


  • Air filter, lubricator, pressure regulator, pressure gauge & speed control valve
  • 6” (150mm) diameter panel mounted outlet pressure gauge
  • Pressure release valve
  • All interconnecting pipework & fittings
  • Robust Stainless Steel Frame as standard


  • Offshore specification available
  • Stroke Counter
  • Outlet Pressure Isolation
  • On board chart recorder
  • Wheels / castors


Model Max Output Pressure @ 100 psi (7bar) Air Drive Displacement/Cycle Max Compression Ratio Supply Pressure to Achieve
Max Output Pressure
Actual Output Pressure (Stall Condition) Data Sheet
Psi Bar Cu Ins cc’s Psi Bar
GBD33 5,700 393 15.6 255.7 15:1 2,400 166 33PA+PS Download
GBD66 9,000 621 8.0 131.1 15:1 2,400 166 66PA+PS Download
GBD118 14,200 979 4.5 73.8 15:1 2,400 166 118PA+PS Download
GBD186 21,000 1,448 3.0 49.2 15:1 2,400 166 186PA+PS Download
Model Number Inlet Pressure Outlet Pressure Flow Data Sheet
Psi Bar Psi Bar SCFM N Ltr/min
GBD33 1,000 69 2,000 138 31.30 886 Download
GBD66 2,000 138 4,000 276 31.50 891 Download
GBD118 2,000 138 6,000 414 20.40 577 Download
GBD186 2,500 172 10,000 690 16.40 464 Download