Product Features
Prevention of Busywork Loss
The pressure sensor detects the pressure of the outlet, and transfers the signal to PLC. The PLC then controls the output frequency of the inverter, achieving the continual variable frequency. Once the pressure goes higher, it lowers the output frequency; once the pressure goes lower, it raises the output frequency. When the system needs no air, the inverter comes to sleep mode.
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Components of Permanent Magnet Screw Air Compressor
1. The double-screw air-end
Adopt German technology GU air end which is third generation asymmetric double screw air end, axial air-inlet design. The design life of durable NFK bearing is over 120,000 hours.
2. Efficient and reliable motor
Use more efficient and reliable operate continuously motor which have passed the CE authentication, ingress protection IP23, class F insulation grade.
3. High efficiency PM motor
Equip with high efficiency PM motor, comparing with normal high efficiency motor, energy saving performance much excellent, especially under constant or variable rotate speed.
The motor and air end are directly integrated into one structure, reducing transmission energy-consumption, achieving high efficiency.
The motor can be suddenly started after the shutdown; the start-stops will not decrease the motor's service life; the starting current is less than 100% full-load current.
The PM motor adopts highly efficient NdFeB permanent magnet. No loss of magnet in 120℃. Its working life exceeds 15 years.
The stator coil adopts special inverter corona resistant enameled wire. Good insulation performance, longer service life. The motor has the advantages of small volume, about 1/3 size as the normal motor, saving space. Unique patented installation can be disassembled instantly and conveniently.
4. High quality and reliable valve
Thousands of reliability and safety testing ensure the quality and durability of inlet valve, minimum pressure valve, thermostatic valve, safety valve.
5. High-quality filter
Adopt own brand oil-air separator, oil filter, air filter element, safe and reliable. Oil-air separator separate thoroughly which oil content less than 3 PPM; Air filter and oil filter are efficiency and long service life.
6. Oil-air separator
The highly efficient oil-air separator presents triple separation of centrifugal, gravity and filtration, leading the remaining oil less than 3ppm.
1st Separation: Centrifugal
The mixture of compressed air inside the compressor and the oil revolve in the separator under the centrifugal force.
2nd Separation: Gravity
After the centrifugal separation, the oil-air mixture punches the inside wall of oil-air vessel, and flow to the bottom of the vessel. At the bottom, the magnetic filter removes the iron powder and other small metals sucked together with air, preventing the scratch of separator.
3rd Separation: Filtration
It adopts the folding oil-air separator to increase the area.
With the fiber as the main body, the cylinder filter collects the atomizing lubricant from the air.
7. English/ Chinese LCD microcomputer touching panel
Screw air compressor control system is applied in English and Chinese LCD touching controller. Support the remote control and chain control. Communication port for RS 485, Modbus communication protocols, can choose other communication agreement.
1) Features of microcomputer controller
1. English and Chinese LCD touching panel;
2. All-round protection of motor with short circuit, plugging turn, phase lack, overload, unbalance;
3. The starting and stopping control of the motor;
4. Protection and measurement of compressor reversal protection;
5. The multiple temperature detection and display;
6. Automatic adjustment of compressor loading, ensure the stabilization of pressure;
7. Long-distance or local control;
8. Multi-machine or single machine operation control;
9. RS-485 communication function;
10. GPRS mobile remote control. (Optional)
2) Microcomputer controller warnings and prompt functions
1. Warning indication of air filter replacement;
2. Warning indication of oil filter replacement;
3. Warning indication of oil-air separator replacement;
4. Warning indication of oil replacement.
3) Microcomputer controller safety protection
1. Protection motor: compressor motor protection of short circuit, plugging turn, phase lack, three phase power imbalance;
2. Compressed air high temperature protection;
3. Protection of compressor reversal;
4. Protection of excessive pressure;
5. Protection of temperature sensor and pressure sensor;
Applications of Permanent Magnet Screw Air Compressor
Jufeng air compressor is widely used in all kinds of industries around the world, including electronics, electricity, water, electricity, environmental protection, petroleum, chemical, mining, metallurgy, pharmaceutical, food, aviation, shipbuilding, military, scientific research, wood, textile, printing, glass, construction, building materials and other fields.
Air compressors can be grouped into three classifications: consumer grade, professional grade and industrial grade.
• Consumer grade air compressors can be described as a pancake or single-stage model. They're used for household tasks like inflating tires and inflatable products and possibly some low-load air tools like staplers and brad guns.
• Professional grade air compressors provide more power and higher pressurized air. They could be two-stage reciprocating models or rotary screw models and can provide more power to run several air tools at once with intermittent use.
• Industrial grade air compressors will be the workhorse of a manufacturing plant or the reliable power source on an oil rig. They are designed to provide a steady flow of compressed air for long periods of time and can take fluctuating surges in use typical in major manufacturing plants. These compressors are built with high-quality components that allow for customization to the specific environment to improve performance, energy efficiency and reliability.
Precautions of Permanent Magnet Screw Air Compressor
1. Srandard Power: 380V/50HZ/3PH, 415V/220V/60HZ and other voltage can be customized.
2. Starting method: 10A or below direct starting,15A or above star-delta srarting.
3. Working environment temperature: -5℃-45℃;
4. Driven method: Belt driven / Direct driven.
5. Welcome request & inquiry of customized the pressure up to 16 bar
6. The company on product improvement and reserves the right of design improvement parameters are subject to change without prior notice.
About the maintenance:
1st maintenance: After 500 hours of running
2nd and subsequent maintenance: Every 2000 to 2500 hours of running
CROWNWELL OIL-INJECTED PERMANENT MAGNET COMPRESSOR
CWD 7-400 PM (7.5-400kW / 10-500hp)
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 Crownwell 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 ℃ approx.) it is separated from the coolant before being cooled in the aftercooler to approx.. 8℃ to 12℃ 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.. 80℃ down to 50℃. It is then injected back into the Crownwell 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.
You will get efficient and thoughtful service from kapa.
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 – System and direct drive
Your benefits
The CROWNWELL Screw compressor block
With coolant injection. Technically advanced, performance optimized profile from the quality assured production facility of our top screw. Highest degrees of precision are maintained throughout rotor production, by grinding and not milling; this ensures that each individual rotor is compatible with every mating rotor. Further, the generously dimensioned combination of cylindrical roller bearings for radial support and four point bearings for axial support is a guarantee of the longest possible service life. Additional safety is built into the heavy duty casing which is designed for pressures up to 15 bar.
Your benefit:
High efficiency
Low power expenses
Low off load expenses
Long life time of the screw compressor block
Long life time of the bearings
Low service expenses
Safety Separation System
with five stage pre-separation and the dry sump which acts as a second separator in series:
Your benefit:
Prevents coolant breakthrough
Guarantees a constant residual coolant content in each operating phase of only 1-3 mg/m3
Ensures the longest service life of the separator cartridge.
Guarantees the lowest internal pressure losses (0.05 bar) by the large internal cross-sectional area.
The horizontal mounting of the pre-separation vessel allows for a large capacity of coolant which results in maximum separation, prevents build up of scum and premature oxidation, even during intermittent operation.
Low waste disposal expenses
High production reliability
Maintenance free multifunctional Intake Regulator System
Your benefit:
Increases the life span of the screw compressor block by compensating the high compression ratio and thus the axial thrust spike at every change of load/full load/stop.
Eliminates maintenance and repair works as well as potential leakage points since it replaces all conventional fittings that are susceptible to failure and abrasion, such as:
Reducing damper (or butterfly valve) with regulating cylinder
Non-return valve after the screw compressor block
Oil stop valve
Blow down valve as well as all associated connections, gaskets, washers and pipework.
Operationally and intrinsically safe. Seals hermetically in the case of power failure. Unwelcome oil leakages are no longer possible.
Lowest maintenance costs
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