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A 60HP machine sits at the point where a workshop stops guessing about air supply. It runs several pneumatic stations at once, holds pressure while sandblasting guns and pneumatic clamps cycle on and off, and still has headroom left over. The 45kW direct drive rotary screw air compressor is built for that kind of steady duty: one motor, one speed, and an output that does not move around when the load changes.
The motor turns at a fixed rated speed and the machine regulates output through a pressure switch. When tank pressure reaches the upper limit, the unit unloads and stops; when it falls back to the lower limit, it reloads and goes back to work. There is no inverter to tune and no speed ramp to wait on. For a plant whose air consumption follows a fairly flat curve across the shift, that simple arrangement is the reason fixed-speed units still outsell variable-speed ones in this power class. The SA-60A 45kW rotary screw air compressor is the OSMAN model built on that principle, with a direct-coupled airend that removes belts from the service schedule.
Control is handled by a microcomputer panel with a display in Chinese and English. Operating the machine means pressing start and stop, and the controller watches load, temperature and rotation state while it runs. Overload, reverse phase, extended idling and high discharge temperature each trip an automatic shutdown, so the unit can be left running through a night shift without someone standing next to it. Faults are shown on the panel as they happen instead of being discovered at the next service visit.
Air cooling keeps the package self-contained, and there is no water circuit or cooling tower to plumb in. The 60 hp three phase industrial screw air compressor runs on a standard 380 V three-phase supply and starts on star-delta, which keeps the inrush current down when the motor comes up to speed. Most buyers pair the machine with a 1.0 m³ air tank, a refrigerated air dryer sized around 8 m³/min, and a three-stage filter set. That combination takes water and oil out of the line before it reaches spray guns or precision tooling.
OSMAN builds the SA-60A at the Shenzhen factory and ships it directly. Consumables and spare parts come from the same stock, and operator training is included with the machine.
Q1: What are the rated specifications of the SA-60A?
A:45 kW / 60 HP, 380 V three-phase 50 Hz, working pressure 0.8 to 1.2 MPa, free air delivery 7.5 to 6.5 m³/min, direct drive, air cooled, star-delta start. The unit measures 1500 x 1000 x 1350 mm and weighs around 780 kg. Voltage can be built to suit other supplies.
Q2: Should I buy a fixed speed or a variable speed (VSD) 60HP compressor?
A:Look at your air consumption curve first. If demand stays close to full load for most of the shift, a fixed speed unit gives the same air at a lower purchase price and with fewer components. If demand swings widely between shifts, a VSD earns its extra cost back by slowing the motor down instead of unloading. Send us your load profile and we will tell you which one pays off.
Q3: What should I pair with this compressor?
A:A 1.0 m³ air receiver, a refrigerated dryer rated around 8 m³/min, and a three-stage precision filter set. That removes liquid water, oil carryover and particles before the air reaches spray painting or precision machining equipment.
Q4: How much space does it need?
A:The machine itself occupies 1500 x 1000 mm of floor. Leave at least 1 m of clearance on all sides so air can move through the cooler and so a technician can reach the filters. The floor should be flat, hardened and able to carry the load, and we supply anti-vibration pads if you want to dampen noise further.
Q5: Can it run 24 hours a day?
A:Yes. The controller monitors load, temperature and rotation continuously and shuts the machine down on overload, phase loss, excessive temperature or long idling. With the service schedule followed, continuous duty is normal for this model.
Q6: What maintenance does it need, and can the machine be customized?
A:Routine service covers the compressor oil, oil filter, air filter and separator element, all held in factory stock. On customization, we build to other voltages on request, set working pressure within the 0.8 to 1.2 MPa band, and can supply the machine together with a tank, dryer and filters as one package.
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Main Product:
Air Compressor,
PM VSD Screw Air Compressor ,
Air Tank,
Air Compressor Parts,
Air Dryer,
Precision Filter
