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129 to 292 ACFM: Mattei's AC Series sets a new standard in air compressors with sophisticated high-efficiency performance, quiet dependable operation, and low maintenance. Featuring quiet cabinet enclosures, MAESTRO XS electronic controllers, energy saving Wye-Delta motor starters, premium efficiency IE3 TEFC motors, air-cooled aftercoolers, to deliver unbeatable performance and energy savings..

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Featuring our most advanced airend designs, AC Series must be compared on an ACFM basis – not based on HP. Why? Our AC Series produces more ACFM per HP than typical rotary screw air compressors. In fact, it is not uncommon to select a smaller HP AC Series model to meet your air demands.

AC Series is friendly to your wallet and the environment as each holds very little lubricant which saves you a small fortune on oil changes and disposal costs. The highly efficient mechanical air/oil separation chamber delivers high-quality air to the air/oil separator filter, so it sees very little lubricant, provides up to 10,000 hours of service and low 1-3 ppm w/w oil carryover.

Available in 230 or 460v/3Ph/60Hz

AC SERIES STANDARD FEATURES:

CONDENSATE DRAIN AND SEPARATOR KIT
The kit includes a condensate separator and a zero loss electronic drain.

ENERGY CONSUMPTION
Thanks to “VANE GAIN” these compressors are world leaders in lowering specific energy consumption (kW/100 ACFM) and among the the most energy efficient compressors in the industry. The regulation system gives you the flexibility to choose between continuous, automatic and modulated inlet control to readily adapt to changes in your facilities air demand profile..

RELIABILITY
These compressors are designed for industrial use 24/7 at constant pressure. Mattei compressors are engineered to operate >100,000 hours without an overhaul.

INCREDIBLY QUIET
AC Series compressors are quiet cabinet enclosed machines that operate at a constant 1,800 rpm.

BEARINGLESS AIRENDS
Mattei Rotor Stator Units (RSU) consist of a single rotor supported by two (2) white metal bushes that routinely deliver >100,000 hours of life and never require and overhaul. Compare that to screw type compressors that use six-or-more radial and thrust bearings and typically provide a fraction of that time before overhaul.

AIR QUALITY
The exclusive three-stage oil separating system guarantees an oil carry-over of 1-3 ppm w/w.

HIGH-EFFICIENCY MOTOR
High efficiency totally enclosed fan cooled (TEFC) electric motors is standard on AC Series.

DIRECT COUPLING
AC Series uses a simple flexible jaw coupling that direct-connects the motor shaft to the compressor shaft. Compare that to those that employ belts and sheaves that wear out and require constant maintenance and, those with speed increasing gears that rotate a small airend at high speeds.

MOTOR STARTER
Energy saving Wye-Delta motor starters are standard on AC Series.

AIR TREATMENT
Air cooled aftercooler with 18°F approach temperature. Moisture separator with zero loss drain valve is standard on AC Series.

MAINTENANCE
Maintenance operations only include changing the oil and filters at predetermined intervals, replacing the air filter and cleaning the radiator. Benefit from oil separating filters that can reach 10,000 working hours, for significant savings over the life of the machine.

CAPACITY CONTROLS ADAPT TO YOUR DEMANDS
The layout and design of every air system is different. Thus, Mattei provides a variety of control schemes as standard to better adapt to the demands and dynamics of your system, to save energy and prevent short-cycling and ambient oil misting problems created by inflexible control schemes and underutilized compressors.

MODULATION OPERATING MODE AT CONSTANT PRESSURE
Thanks to a modulating proportional intake valve that supplies air at constant pressure, these compressors can even work without air receivers. This method automatically adapts to system demands and is ideal for applications with little storage or continuous high air demands.

AUTOMATIC ON LOAD / OFF LOAD
Load/Off Load maintains line pressure within a minimum/maximum pressure range, and the compressor may stop and restart according to air demand. Ideal for applications with adequate air storage tanks or large variations in air demand.

COMBINED ON/OFF LOAD AND MODULATION REGULATION
This regulation allows Mattei compressors to modulate within a set pressure range (for example, ± 4-5 psi). Should the air demand decrease, the compressor will off-load and stop, with evident energy savings. Ideal for applications with little storage and large variations in demand.

ELECTRONIC CONTROLLERS
AC Series are equipped with an exclusive state-of-the art computerized controller, Maestro XS.

Maestro XS, automatically controls, monitors and programs the unit's operation, and has an option to connect to a PC for a remote control. Capable of managing, alternating and sequencing with other compressors equipped with Maestro XS, this controller often foregoes the need to have a master controller. Maestro XS can be interfaced via web or cellular technology to provide remote service monitoring.

AC SERIES OPTIONAL FEATURES: 

HIGH-EFFICIENCY AIR INTAKE FILTER KIT
Heavy-duty high efficiency air intake filter is an option for dirty, dusty environments. Removes solid particles > 3μ with a filtering efficiency up to 99%.

AIR TREATMENT PRODUCTS
Mattei offers comprehensive air treatment accessories to complete your air system including: in-line coalescing filters, refrigerated air dryers, desiccant air dryers, sterile in-line filters, air receiver tanks, timer and demand style condensate drains, and oil/water condensate separators. 

OPERATING PRINCIPLES 

Blade Series
1. Intake Filter
2. Automatic Intake Valve
3. Oil Chamber
4. Compression Chamber
5. Oil Cooler
6. Oil Filter
7. Labyrinth
8. Compressed Air
9. Rotor
10. Coalescing Filter
11. Oil Return Valve
12. Minimum Pressure Non Return Valve

The air is drawn in by means of a filter and passes through a modulating proportional valve that regulates the air delivery according to the demand. This valve automatically maintains the working pressure at constant levels.

Therefore, the air enters the compression chambers or vanes that the stator, the rotor, the vanes and the covers have formed. This rotor is installed eccentrically to the stator and is equipped with longitudinal grooves in which the blades slide. It is the centrifugal force that pushes the blades against the stator's wall.

An efficient oil injection system guarantees a perfect holding among the moving parts, cooling and lubrication. An oil film on the stator's inside surface prevents the moving parts from wearing by avoiding a direct contact with the blades.

Air compression is triggered by the volume reduction of the vanes in the stator during rotation. By passing through mechanical and coalescing separation stages, the mixture of compressed air and oil is purified until the maximum oil carry-over in the air does not exceed 3 ppm (parts per million).

Finally, the air is cooled in the radiator and the condensate is eliminated by a zero-loss condensate drain.