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Screw Compressor Specifications
Standard range of screw compressors:
- Screw type, oil-injected air-end, with asymmetric high-efficiency rotor profile, with massive bearing construction, ensuring highly reliable, continuous operation.
- Electric motor, standard metric frame, three-phase, class-F insulation, 400 V-50 Hz, IP23 drip-proof enclosure (TEFV IP55 enclosure is standard up to 75 HP).
- Motor starter, Star-Delta type, with motor overload protection.
- Air-cooled aftercooler, cooling the compressed air to about 10˚C above ambient.
- Dry type, air inlet filter.
- Lubrication system, complete with air-cooled oil-cooler, oil filter, safety valve, oil level gauge, interconnecting piping, thermostatic mixing valve enabling stable operating temperatures .
- Fine air-oil separator, two-stage, ensuring 1 to 3 PPM oil-carryover (by weight).
- Control panel, including pressure gauge, temperature gauge, filter service indicator, hour-meter, fault indicating lamp, start/ stop / reset switch (on compressors of 60 HP and above, MAXTRONIC electronic control panel is standard - see options below) .
- Automatic capacity control with suction throttling type, two-step load/unloading, auto-stop after timed unloaded run, and auto-start on renewal of air-demand (on sizes of 60 HP and above, combined control with upper-range modulation is standard. See "Capacity Control Options")
- Acoustic canopy, for the reduction of the noise level down to 76 to 82 dBa (standard up to 30 HP).
Optional features
A unique ability to supply a large variety of standard or custom engineered solutions for special applications or for specific customer requirements:
Pressure Options - 5 TO 35 BARG (72 to 508 psig)
Electric motor drive options - IP23 / IP55 / explosion-proof enclosures
Motor voltage / Frequency options - 3300/ 6600 V and others, 50 or 60 HZ
Motor starter Options - Soft Starters, Digital or analog types ,Vacuum switch contactors Compressor Cooling Options - Air cooled, water-cooled, stainless-steel or titanium coolers. Silencing Options - Non-silenced (Open type) and silenced compressors.
Capacity Control Options:
Combined Capacity Control (Upper range Modulation) down to partial capacities of 50% (adjustable ), unloaded run with automatic timed-stop and auto-start on renewal of air demand.
Power Saving "TURN-VALVE" Control, with the stepless reduction of the effective length of the rotor proportional to air demand, ensuring minimum power consumption at part-load. One of the simplest and most efficient capacity controls in rotary Air compressors, from 100% down to 0% flows, for plants having large fluctuations in compressed air demand, with up to 20% saving in power costs.
Variable- speed capacity controls - Stepless reduction of flow at constant pressure is achieved with the stepless reduction of the motor speed by frequency variation, realizing a proportional saving in power.
Filtration options: Centrifugal Turbo-prefiltration, for high dust-laden environments.
Local control panel options: "MAXTRONIC" Digital Control Panel, with digital readout of pressures, temperatures, total-run and on-load run-hours, alarm and shutdown LED's for high-temperature and pressure, shutdown LED's for motor and fan overload, service schedule announcement for each periodic maintenance function, optional alarm and fault LED's for air & oil filters, oil separator, low-oil level. Comprehensive, user-friendly compressor control.
Remote control options: Compressors can easily be wired for capacity control from remote location, manually or by remote digital controller.
Multi-compressor controls: Sequencers to control any number of screw or other type of compressors coordinately and with minimum total-power consumption.
Technically oil-free air options: "TECHNICALLY OIL-FREE "air compressor sets, with microfibre air/oil separation, reducing the oil content down to 0.003 PPM oil residue.
Special skids and packages: Compressor / Refrigeration or Dessicant dryer / microfibre separator /control packages, fully factory piped & wired, on one or more skids.
Specifications are subject to change without notice. |
