class is, the higher the compressed air purity represented is.
Innovation Design of Ingersoll Rand Oil-free Screw Air Compressor
Stator coil and permanent magnet rotor of the hybrid permanent magnet motor produce a strong
electromagnetic force and drive the motor sha£ to rotate at dierent speeds, directly driving the
directly-connected male rotor of the airend without eciency loss of any intermediate drive part.
Eliminate the use of wear parts and bearings in the motor & gear / bearing / sha£ seal to consume less
wear parts
With a volume equal to 1/3 of an ordinary motor, it can be maintained on site and replace one of its
winding coils rather than replacing the whole winding for a conventional motor, which saves a lot of money.
So£ start at a starting current less than the rated current & infifinite starts / stops, saving 30% energy for
unloading over conventional air compressors and maintaining a continuous operating eciency up to 96%
Permanent magnet synchronous motor IE4 motor with IP55 rating
Excellent protection level IP55, signifificantly improved than the original Lleysenma motor protection level,
motor energy eciency IE4(and at any turn Energy eciency can be maintained IE4); With unlimited start
and stop function, automatic stop under low speed, no unloading process
Nirvana Three-tube Parallel Cooler
Distribute compressed air to three separate tubes to reduce pressure loss and balance
heat load
Eliminate heat circulation and pre-cooler to greatly reduce the exhaust temperature of
second-stage compression chamber to approx. 30°F (17°C)
Air-cooled oil-free screw air compressor with Nirvana guaranteesstable CTD by
adjusting air flflow of variable frequency centrifugal fan, which also saves energy and
reduce noise
Ensure that the cooling flflow to accommodate ambient temperature & load changes,
and eliminate the possibility for compressed air to bring liquid water into
second-stage rotor
Durable & Lasting Compression Module
High ecient double-screw two-stage compression module with cast iron
housing & synchronous gear drive
The older oil-free screw compressor is equipped with a balance piston to
oset the axial thrust, which can be easily seized by dust and other
pollutants. To eliminate the hidden danger, Ingersoll Rand oil-free screw
compressor replaces the balance piston with a pair of
thrust bearings, which can withstand the axial force
and improve the operation reliability of the airend
The rotor with super coating guarantees stable and
long lasting operating performance
The stainless steel second-stage rotor can be operated
at high temperature with greatly extended service life
Excellent Reliability of Cooling Unit
The unit is designed for the high temperature & high humidity working environment in Asia
The air-cooled unit can be normally operated continuously under high temperature up to 46°C, and
the water-cooled unit can reach the highest inlet water temperature of 46°C
CTD of the cooling device can reach 8-10°C
All Sierra can be operated at harsh ambient temperatures to avoid high temperature shutdown
UltraCoat Super Coating
Both rotor and base surface needs to be treated with Ingersoll Rand super coating through mechanical and
chemical processes to ensure that the coating is extremely thin and fifirmly adhere to the surface
A£er the rotor surface is roughened through shot peening, molybdenum disulfifide (MoS2) molecular resin
embedded with high-temperature organic resin is mechanically wrapped onto the rough surface to make it
durable, oxygen-resistant and non-fragile
Compared to other coatings, UltraCoat super coating has a longer service life and reduces the airend energy
consumption by 10%
Stainless steel and aluminum alloy pipes are selected to connect the intercooler and stainless steel secondary
rotor, which will not be corroded by the condensate produced in the intermediate cooling process, and extends
the service life of the coating and rotor by preventing rust and shedding
High Ecient Inlet Valve
Ingersoll Rand high ecient inlet valve uses advanced hydraulic regulator (instead of pneumatic regulator), which eliminates
regular replacement of pneumatic elements and reduces unnecessary downtime and maintenance costs
A combined inlet & vent valve is used for loading / unloading. At the time of loading, the butterflfly valve is
fully open, and meanwhile the vent valve is closed; at the time of unloading, the butterflfly valve is closed,
when the air is circulated through a small hole on the butterflfly valve flflap and interlocks the vent valve to
open for venting
Nirvana oil-free air compressor with real VSD function
Ingersoll Rand is a manufacturer of oil-free air compressor with real VSD function. Nirvana oil-free air compressor can provide high quality oil-free
compressed air supported with unmatched reliability in the market. Ingersoll Rand has once again successfully developed and released to market an
oil-free air compressor with real VSD variable-frequency drive system by right of its unique design combining hybrid permanent magnet motor with
innovative modular converter. Compared with other types of oil-free screw air compressors, Nirvana oil-free air compressor has much less rotating
parts, and thus guarantees its extremely high reliability as driven by hybrid permanent magnet motor.
Precise Winding
The winding of hybrid permanent magnet motor of Nirvana oil-free air compressor is directly
wound on the convex structure simply and reliably to eliminate low eciency &heat
concentration (oen leading to motor insulation layer destruction and other faults) of ordinary
induction motor. While repairing a conventional air compressor may result in shutdown for days
or weeks and certain rental cost, and rewinding coils or replacing bearings will cost a lot of
manpower and material resources, Nirvana stators can be replaced quickly and costs less than
replacing motor windings.
worse, harmed consumers and product liability.
