Li'l CRITTERTM
High Pressure Gas Compressors

Hydro-Pac
Li'l CRITTER^TM High-Pressure Gas Compressors were designed by Hyrdo-Pac to offer big compressor reliability and service life in smaller machines

These tough "little brothers" of Hydro-Pac's FLEXI-POWER^TM compressors are well suited for laboratory and production applications. They are offered in sizes of 3, 5 and 7.5 hp for pressures to 45,000 psi.

Li'l CRITTER^TM compressors are available for a variety of industrial gases, and are offered as single or two-stage units.

HOW COMPRESSORS WORK

Features

Hydro-Pac Li'l CRITTER^TM High-Pressure Gas Compressors feature:

• Oil-free non-lubricated gas cylinders minimize the chance of contamination.
• Long slow stroke results in longer packing and check valve life.
• Reversible valve seats allow use of both sides prior to seat replacement.
• Efficient operation does not require plant air.
• Li'l CRITTER^TM compressors may be started under full load
• Water-cooled cylinders and interstage cooler lower operating and gas temperatures and increase seal life.
• Pressure compensated gas piston seals adjust automatically for wear.
• Compact self-contained machine requires minimum space.
• Auto-Shift design ensures smooth and reliable cycling of the intensifier without electrical switches.
• The 7.5 hp Li'l CRITTER^TM Compressor incorporates an advanced hydraulic system. Flow is adjusted according to load resulting in greater overall capacity

Patented Free-Piston Design

Li'l CRITTER^TM Compressors feature Hydro-Pac's patented free-piston design. This exclusive feature allows replacement of all high-pressure seals in just a few minutes without major disassembly of the intensifier.

Freedom from Contamination

An isolation chamber ensures segregation of the compressed gas from the hydraulic fluid.

For applications requiring ultra-pure gas, optional full-length isolation spacers are available that do not allow entry of the oil wetted portion of the plunger rod into the gas cylinder.

Applications

Hydro-Pac Li'l CRITTER^TM High-Pressure Gas Compressors are ideally suited for:

• Hydrogen fuel cells
• Hot isostatic pressing
• Pneumatic testing
• Chemical processing
• Supercritical extraction
• Gas circulation
• Instrument calibration
• Many other applications that require clean gas

Standard Equipment

Hydro-Pac Li'l CRITTER^TM High-Pressure Gas Compressors are finished as complete units.

• Gas intensifier with inlet, interstage and discharge check valves
• Electric motor 230/460V, 3 ph, 60 Hz, TEFC
• Hydraulic power unit with pump, directional control valve and filters.
• Interstage over-pressure protection device
• Instruction manual

Standard Gases

• Argon
• Nitrogen
• Helium
• Carbon Dioxide
• Dry air
• Mixtures of 20% oxygen and other inert gas
• Methane
• Other inert gases

Options are available for compressing

• Hydrogen
• Ethylene
• Other gases

Optional Equipment

• Spare-parts kit
• Motor starter
• Pressure gauges for suction, interstage and discharge
• Aftercooler
• Coolant-flow sensor
• Oil reservoir heater
• Explosion-proof motor

Utilities

• Electrical: 230/460V, 3 ph, 60 Hz (Other voltages available)
• Coolant: 90ºF maximum, 0.25 gpm/hp (30ºC maximum, 1,25 lpm/kW)

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