Hydraulics International Inc. (HII) is a leading manufacturer of air and electric driven gas extraction pumps and boosters.
HII offers a full range of USA made high-pressure pumps used for subcritical and supercritical Botanic Oil extraction utilizing gases and liquids such as: CO2, Ethyl Alcohol Ethanol, Propane, Utane / Isobutene and other refrigerant gases.
MODEL GBX-424 AND GBX-412
BUTANE & PROPANE EXTRACTION PUMPS
Low-Pressure, High Flow, Oil Free
These units are designed for subcritical and supercritical Botanical Oil extraction using Butane & Propane. It consists of a large area double acting drive piston directly connected, through a high pressure seal and bearings, to a double acting or 2-stage boost piston. The drive section includes a spool type directional control valve and poppet type pilot valves to allow automatically reciprocate when compressed air (or a suitable gas) is applied to the drive port. Drive exhaust is routed to a muffler which is positioned near the finned gas section to enhance cooling.
Model GBX-424 is a double acting configuration. The boost piston provides double acting flow due to the action of the dual inlet and outlet check valves built in.
Model GBX-412 is a 2-stage configuration. Output is only provided during the “pull” stroke (2nd stage). On the opposite stroke (1st stage), gas is compressed and transferred into the 2nd stage whose volume is somewhat smaller due to the connecting rod.
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MODEL GBX-741 AND GBX-722
BUTANE & PROPANE EXTRACTION PUMPS
Low-Pressure, High Flow, Oil Free
These units are designed for subcritical and supercritical Botanical Oil extraction using Butane & Propane. It consists of a large area double acting drive piston directly connected, through a high pressure seal and bearings, to a double acting or 2-stage boost piston. The drive section includes a spool type directional control valve and poppet type pilot valves to allow automatically reciprocate when compressed air (or a suitable gas) is applied to the drive port. Drive exhaust is routed to a muffler which is positioned near the finned gas section to enhance cooling.
Model GBX-741 is a double acting configuration. The boost piston provides double acting flow due to the action of the dual inlet and outlet check valves built in.
Model GBX-722 is a 2-stage configuration. Output is only provided during the “pull” stroke (2nd stage). On the opposite stroke (1st stage), gas is compressed and transferred into the 2nd stage whose volume is somewhat smaller due to the connecting rod.
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