A scroll air compressor has only two moving parts, a fixed spiral plate and a rotating or wobble spiral plate. As the wobble plate rotates around the fixed plate, air is trapped and gradually squeezed; increasing pressure. Compressed air is produced at 100% volume efficiency! Since there are no reciprocating parts or valves, there is no re-expansion losses, no vibration, and no noise. Also, parts don't wear out. The scroll pump is very simple, very quiet and very low maintenance. Powerex scroll compressors are oil-less; meaning no oil is utilized anywhere in the compression cycle.
As the leaders in scroll pump technology, Powerex's latest design incorporates several innovative features:
As the scroll orbits from No. 1 to No. 4 positions, a crescent-shaped cavity is gradually reduced, compressing the air and exhausting it through the final discharge point at the center.
With the Powerex Variable-Pump-Drive system, each compressor pump is automatically staged on/off individually based on actual system demand. Energy efficiency is maximized at all usage levels. Lead compressor status will alternate every time a pump is called for, or every 10 minutes, whichever comes first. This will maintain equal run hours and extend maintenance intervals.
The graph shows the relationship of daily air consumption of the plant and the corresponding electrical consumption of the compressor. As air demand fluctuates, the variable pump drive control logic engages the compressor when more compressed air is needed without causing fluctuations in supply line pressure.
The system display shows current operating conditions, pump run status, system pressure, run hours, and alarms. The onboard diagnostic system constantly monitors the system and alerts the user of any problems or service required. Advanced control logic determines when to stage compressors to yield maximum energy efficiency.
Each enclosed scroll compressor system is packaged in a rigid steel frame with powder coated panels and lined with sound deadening insulation. The low noise levels are unmatched in the industry and allow the compressor to be installed right at the point of use. Our small footprint maximizes your floor space.
With no oil in the compressor you can rest assured that you are doing your part for the environment.
The oil-less composite piston slides up and down within a low friction, wear-resistant aluminum cylinder, compressing air on the upstroke. The discharge air is cooled via an air to air after cooler. The multi-finned compressor cylinder is cooled by a dedicated fan (2 through 15 hp) as well as the fan blades on the flywheel. Compressors are single stage 1 through 3 hp and two stage 5 through 15 hp.
The oil lubricated piston slides up and down within a cast iron cylinder, compressing air on the upstroke. The compressor's crankshaft, wrist pin, and cylinder walls are lubricated by oil within the crankcase. Robust and reliable, our lubricated compressors are a perfect choice.
A lubricated rotary vane pump has a series of sliding vanes attached to a rotor in the pump cylinder. As the rotor spins, centrifugal force causes the vanes to slide outward to form a seal on the cylinder wall with oil that is injected into the pumping chamber. Air is pulled in the pump inlet which is then compressed and discharged into the exhaust box. The sealing oil is filtered and re-circulated within the pump via oil filters which eliminates 99.9% of lubricating oil from the exhaust.
A rotor is mounted eccentrically in the pump cylinder and contains several sliding vanes. As the rotor turns, centrifugal force causes the vanes to slide outward, creating a seal against the cylinder wall. The vanes are constructed of a self-lubricating graphite composite material which allows them to operate against the cylinder wall without the need for any other sealing or lubricating liquid. As a result of the offset rotor, a succession of variable volumes is formed in the cylinder housing creating the flow of vapor through the pump. Vapor is pulled into the pump inlet which is then compressed and discharged through the exhaust to atmosphere.
Inside the pump housing, two claw shaped rotors take in air as they rotate in opposite directions. The air is compressed by the rotors, then discharged through a silencer to atmosphere. The pumping chamber is dry and there is no contact between the rotors or the cylinder wall.