Crownwell Oil-Injected Rotary Screw Compressors

 CWD 7-400 & CWD 7-400 PM
Power output: 7-400 kW / 10-500 hp
Delivery rate: 0.8-71.2 m3/min / 28-2514 cfm
Pressure range: 7-13 bar / 100-190 psig

CROWNWELL COMPRESSOR - HIGHEST STANDARD

SIMPLICITY BUT NOT SIMPLE

For three generations, customers from mechanical engineering, industry and trade have relied on CROWNWELL know-how when it comes to planning, developing and manufacturing compressed air systems. They are fully aware of the fact that CROWNWELL AIR is more than just ordinary compressed air: utmost safety, outstanding efficiency, excellent quality, maximized flexibility along with dependable service are the ingredients to transform CROWNWELL AIR into air to work with - in China, in Asia and in more than 102 countries around the world.

The III generation, the basis for economical compressed air production

The Know-How
More than decades of know-how in manufacturing for the compressed air market. World wide knowledge in different compressed air applications have guided the development of customer specified stationary screw compressors.

Technical Advancement for your Benefit
The advantage of CROWNWELL lies in its simplified construction. Fewer components are utilized. This means a 60% reduction in main and wearing parts and over 70% fewer pipes and connections. In turn, this greatly reduces the risk of leakages, making the system environmentally friendly. Safe direct drive operation without V-belt transmission.

The CROWNWELL Screw Compressor works in the following way:
Ambient air is drawn through the intake filter and the multifunctional control system into the screw compressor block. This block consists of a pair of screw rotors. The main rotor, driven by an electric motor, takes the secondary rotor with it. The air is drawn in by the rotation of both of the interlocking rotors and is continually compressed. During rotation, coolant is injected into the rotors and forms a hydrostatic film between the main and secondary rotors. The function of the coolant is to seal the rotors, lubricate the bearings and adsorb the compression heat. Before compressed air leaves the compressor ( at 80 ºC approx.) it is separated from the coolant before being cooled in the aftercooler to approx.. 8ºC to 12ºC above the ambient temperature. The coolant then passes to the thermostatic control block and filter, before entering the cooler where it is cooled from approx.. 80ºC down to 50ºC. It is then injected back into the screw compressor block.

Features:
Direct drive via flexible coupling.
Fully encapsulated CROWNWELL screw compressor block.
Standard electric motor Protection Index IP23 and IP54.
User friendly service access.
Top quality, washable, oil resistant sound insulation.
Ready for operation, prewired and fully enclosed.
With operating mode selector switch Automatic-Off-Continuous.
Centrally mounted cooling fan provided for compressed air and lubricant coolers.
Compact and neat cabinet design.

Optional Equipment:
Sense of rotation
Multiple unit control with automatic base load selection
Full motor protection
Mains isolator switch for wall mounting

Beyond these features we offer a wide choice of compressed air accessories in reference to our compressor product range.
Energy Recovery Systems CROWNWELL-THERM
Compressed Air Filters
Compressed Air Dryers
Condensate Traps
Oil-Water Separators
Compressed Air Receivers

Crownwell OIL-INJECTED PERMANENT MAGNET Variable Speed COMPRESSOR TECHNICAL SPECIFICATIONS CWD 7-400 PM (7.5-400kW / 10-500hp)

• Unit performance measured according to ISO 1217, Annex C, Edition 4 (2009)

Reference conditions:
-Relative humidity 0%
-Absolute inlet pressure: 1 bar (a) (14.5 psi)
-Intake air temperature:  20°C, 68°F

• Noise level measured according to ISO 2151:2004, operation at max. operating pressure and max. speed; tolerance: ±3 dB(A)
• PM-Permanent Magnet

Crownwell TWO-STAGE OIL-INJECTED PERMANENT MAGNET Variable Speed COMPRESSOR TECHNICAL SPECIFICATIONS CWD 7-400 PM (7.5-400kW / 10-500hp)

• Reference conditions: Unit performance measured according to ISO 1217, Annex C, Edition 4 (2009)

-Relative humidity 0%
-Absolute inlet pressure: 1 bar (a) (14.5 psi)
-Intake air temperature:  20°C, 68°F

• Noise level measured according to ISO 2151:2004, operation at max. operating pressure and max. speed; tolerance: ±3 dB(A)
• II-Two Stage, PM-Permanent Magnet

Company Information

Shanghai Crownwell Compressor Co., Ltd.

Shanghai Crownwell Import & Export Co., Ltd.

No.8, Lane 800 Yanghui Rd., Shanghai 201314 China

Crownwell is a professional company of air compressors and pumps. Crownwell has two business divisions, one is Crownwell own brand products, the other brands are Ingersoll Rand products. 

Crownwell Shanghai started the business as a close partner of Ingersoll Rand since 2006, our sales team can provide you competitive price with high quality products, our customer supporting team will get all your orders fulfilled on time and provide you excellent aftersales service. 

Our product range represents the most comprehensive portfolio of compressed air equipment offered for thousands of applications in the Mining, Quarrying, Oil, Textile, Food, Marine and many other industries. Our products consist of medium and high pressure reciprocating compressors, oil-injected screw compressors, oil free screw compressors, vane compressors, centrifugal compressors, portable compressors and pumps.

Our mission is to bring China assembled compressors and pumps of good quality and service, with attractive price for all the customers all over the world. Until 2023, Crownwell has many valued partners and customers in over 136 countries. You are welcomed to be developed with Crownwell together for a fruitful future.