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Slow Revving
A slow rpm means the pump is working cooler, easier and will significantly outlive a faster revving machine.
Waste Water Discharge
Compressor condensate containing more then 20mg/l mineral oil cannot be disposed in sewer systems without treatment. Oil water separators can be installed to ensure regulation compliance.
Switch Gear
The standard of switch gear is important to ensure the compressor will reliably cut out when required.
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Receiver Size
The receiver needs to be sized correctly for efficiencies and cost savings, if under sized the compressor will be working too hard to maintain the desired volume of air. Cutting in and out too often, increases energy costs and shortens motor life.
Location
If exposed to the elements, consider the effect on the life of your compressor and the quality of air being supplied. Discuss the alternatives to ensure a good return on your investment.
Noise
Consider the noise output of our compressor in line with OH&S regulations. If noise is an issue, a silenced solution is required.
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Valve Types
Disc valve operation provides better sealing and higher efficiency, where as reed valve compressors require a check valve in the discharge line due to their tendency to leak.
Unloader Type
Direct unloading at the inlet valves is the most efficient method as opposed to check valve unloading which causes the compressor to suddenly stop, increasing wear & tear. Premium option for control is a separate unloader, as opposed to a combined pressure switch/unloader which is cheaper and not as reliable. |
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What to Consider when buying a Rotary Screw Compressor |
Oil Separator Type
Maintenance costs will be significantly less if the separator is a spin-on type which can be changed out in seconds, as opposed to the flange type which take at least an hour to replace.
Maintenance Schedule
Consider the ongoing maintenance costs of the system you are buying. Rotary screw compressors need to be maintained at the required intervals to ensure long life and efficiency in performance. You should request an upfront service plan ensuring their are no hidden costs and your investment is protected. |
Aftercooler Size
Ensuring the aftercooler is sized adequately is a key aspect o controlling the temperature of operation which allows for quality air with reduced condensate.
Switch Gear
The standard of switch gear is important to ensure the compressor will operate reliably for many years.
Location
Consider the effect on the life of your compressor and the quality of air being supplied, if exposed to the elements. Discuss the alternatives to ensure a good return on investment. |
Waste Water Discharge
Compressor condensate containing more then 20mg/l mineral oil cannot be disposed in sewer systems without prior treatment. Oil water separators can be installed to ensure regulation compliance.
Receiver Size
The receiver needs to be sized correctly for efficiencies and cost savings, if under sized the compressor will be loading and unloading too frequently increasing wear and energy consumption.
Noise
Consider the noise output of the compressor in line with OH&S regulations. |
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| ¨Internationally renowned 'Garner Denver Air Ends' new design ensures the ratio of output capacity to power used is maximised. In the new air end profile the female rotor has five lobes and the male has four lobes, this arrangement provides the smallest inner leakages, and the shortest seal line providing a higher capacity output. The new rotor profile incorporates a minimised 'blowhole' design reducing the torque required and reducing power consumption.
¨ Suction valve - flexible design with on/off modulation control, reducing the electrical consumption during the unloading phase to 20% of the installed power.
¨ Advanced easy system controller (ESC) continuously monitors the number of startups and unloading phases, detecting trends in duty cycle and automatically controls the operation of the compressor further reducing energy consumption. |
¨ Fool proof easy system controller (ESC) mans the compressed air system for you, automatically controlling all functions of the compressor.
¨ ESC Manages;
- working cycles controlling the unloaded and loaded period.
- user programmable star delta startups, limiting the number of startups per hours (default 6, options 1-130).
- allows two or more compressors to be connected for parallel working cycles.
¨ ESC displays operation and signaling alarms for;
- hours of operation and programmed maintenance intervals as required, optimising system life and performance.
- operating temperature and cut off function for exceeding set limits.
- will not permit wrong direction of motor rotation.
- voltage drop detection system; if a voltage drop of more than 40ms is detected the machine will automatically shut off, protecting electronic controls and preventing possible hazards. | |
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Air compressors should not be sized by their piston displacement specification. This is a theoretical value only and does not account for leakage, sealing, heat etc. We have provided this figure in our technical tables for comparison purposes ONLY. Please refer to the FAD (Free Air Delivery) figures when sizing a compressor as this is the ACTUAL volume of air delivered by the compressor. |
