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55kW 75HP 8 bar 10 bar Double Stage Air Compressor Compresores De Aire
Permanent magnet variable frequency screw air compressor
The two-stage compression screw variable frequency air compressor combines the advantages of two-stage compression technology and variable frequency control, and has outstanding performance in energy efficiency, stability, life and applicability. The following are its main advantages and characteristics:
1. Ultra-high energy efficiency, significant energy saving
Two-stage compression optimization: The air is compressed in two stages (low pressure stage + high pressure stage), and the cooler is used in the middle to reduce the compression power consumption, which saves about 15%~20% energy compared with single-stage compression.
Variable frequency regulation: The variable frequency drive (VFD) adjusts the motor speed in real time according to the gas demand to avoid unloading waste, especially in scenarios with large load fluctuations (such as intermittent gas use), which can save 30%~50% energy.
2. More stable air pressure and air supply quality
Constant pressure output: Variable frequency control realizes precise pressure regulation (±0.1 bar), avoids air pressure fluctuations, and meets the needs of precision manufacturing, electronics, etc. that are sensitive to air pressure.
Low temperature operation: Two-stage compression reduces the single-stage compression ratio, reduces the heat load of bearings and rotors, extends the life of lubricants, and reduces high temperature failures.
3. Long equipment life and low maintenance cost
Load balancing: Two-stage compression shares the compression ratio, reduces the mechanical stress of single-stage bearings and rotors, and extends the life of core components (such as screw main engine).
Soft start protection: The variable frequency starting current is small, which reduces the impact on the power grid and mechanical components, and reduces the wear of the motor and transmission system.
4. Low noise and environmental protection
Variable frequency noise reduction: The noise is significantly reduced when running at low speed (10~15 decibels lower than the industrial frequency machine), which is suitable for quiet environments such as hospitals and laboratories.
Emission reduction effect: High efficiency and energy saving reduce carbon emissions. Some models use environmentally friendly lubricants (such as synthetic esters) to reduce environmental pollution.
5. Wide range applicability
High pressure demand: Two-stage compression can easily achieve high pressure output (such as above 1.3MPa), which is suitable for high pressure scenes such as laser cutting and CNC processing.
Adaptation to variable working conditions: Variable frequency technology is compatible with continuous adjustment from low load to full load, and can cope with seasonal or gas consumption fluctuations.
6. Intelligent control
Remote monitoring: integrated intelligent controller, supports Internet of Things (IoT) access, real-time monitoring of energy consumption, fault warning, and optimization of maintenance cycle.
Multi-machine linkage: can be combined with multiple air compressors to form an intelligent joint control system, start and stop on demand, and further improve energy efficiency.
Typical application scenarios
High-energy-consuming industries: continuous production fields such as automobile manufacturing, metallurgy, and chemical industry.
Precision industries: semiconductors, medicine, and food processing (oil-free models are required).
Fluctuating load scenarios: intermittent gas-using equipment such as injection molding machines and textile machinery.
Technical Parameters
| Model | Air Delivery (m3/min) | Power (kW) |
Noise (Db) |
Outlet diameter |
Dimensions (mm) | Weight (kg) |
|||
| 0.7MPa | 0.8MPa | 1.0MPa | 1.3MPa | L * W * H | |||||
| RK30APMII | 4.3 | 4.1 | 3.5 | 2.7 | 22 | 68 | G11/2 | 1500x1000x1350 | 650 |
| RK40APMII | 6 | 5.9 | 4.7 | 3.9 | 30 | 68 | G11/2 | 1500x1000x1350 | 700 |
| RK50APMII | 7.1 | 6.9 | 5.8 | 5.4 | 37 | 68 | G11/2 | 1500x1000x1350 | 750 |
| RK60APMII | 10 | 9.5 | 7.8 | 6.8 | 45 | 72 | G2 | 2100x1300x1650 | 1250 |
| RK75APMII | 13 | 12.5 | 9.2 | 7.5 | 55 | 76 | G2 | 2100x1300x1650 | 1300 |
| RK100APMII | 15.5 | 15.2 | 12 | 10.2 | 75 | 76 | G2 | 2100x1300x1650 | 1350 |
| RK125APMII | 19.8 | 19.5 | 15 | 14 | 90 | 76 | DN80 | 2500x1650x1900 | 2700 |
| RK150APMII | 24 | 23 | 19.2 | 16 | 110 | 76 | DN80 | 2500x1650x1900 | 2800 |
| RK180APMII | 27.5 | 27 | 23.7 | 19 | 132 | 78 | DN80 | 2500x1650x1900 | 3000 |
| RK220APMII | 33 | 32.5 | 27.5 | 22.5 | 160 | 78 | DN80 | 3000x1900x1950 | 4300 |
| RK250APMII | 39 | 36 | 32 | 27.5 | 185 | 78 | DN80 | 3000x1900x1950 | 4400 |
| RK275APMII | 43.5 | 41 | 35.5 | 31.5 | 200 | 78 | DN100 | 3600x2200x2200 | 5000 |
| RK300APMII | 51.5 | 48.3 | 38.5 | 35.5 | 220 | 82 | DN100 | 3600x2200x2200 | 5500 |
| RK350APMII | 54 | 51 | 45 | 38 | 250 | 82 | DN100 | 3600x2200x2200 | 6000 |
| RK380APMII | 60 | 57 | 50 | 43 | 280 | 82 | DN125 | 4000x2300x2300 | 6800 |
| RK420APMII | 65 | 62 | 56 | 50.5 | 315 | 82 | DN125 | 4000x2300x2300 | 7000 |
| RK480APMII | 75 | 73 | 64 | 55 | 355 | 82 | DN150 | 4200x2200x2350 | 8500 |
| RK540APMII | 84 | 82 | 72 | 61 | 400 | 82 | DN150 | 4200x2200x2350 | 9000 |
1.Packing Details: Plywood crate pallet plus foam board and bubble film, Full closed wooden case. 1pcs/each package (for stationary screw air compressor)
2.Shipping method: by sea, by LCL/FCL or as requested
3.Delivery method: FOB, CFR, CIF and EXW etc.
4.Delivery time: in 7-15 days after receiving deposit (customized machines not included)
Shanghai Rocky Machinery Co., Ltd. was established in 2003 and has 18 years of experience in the air compressor industry. It is an innovative enterprise integrating production, trade, service, research and development.
We are professional gas compressors manufacturer since 2003, Germany standard, more than 100 workers, annual sales exceeding 20 million US dollars with 13 years of exporting experience, strict quality control and delivery on time. We not only supply gas compressor including screw air compressor, but also supply spares parts and after-treat machines.
Our main products series as follows.
1.24/7 after sales service support in different languages.
2.Follow up the feedback of products in 2 months interval by email or call.
3.Guidance of installation and commissioning on site can be provided by factory-trained technicians or local Authorized Service Center.
4.Technical training for customers in Rocky air compressor factory or working site.
5.All kinds of technical documents in different languages.
FAQ
Q1. Are you trading company or manufacture ?
A: We are professional manufacture of screw air compressor of Taicang,Jiangsu,China. More than 18 years of experience in air compressor manufacturing.
Q2. How long is the delivery time ?
A: For standard voltage ,15 working days. Non-standard ,please contact our sales.
Q3. What's payment term ?
A: T/T, L/C, D/P, Western Union, Paypal, Credit Card, and etc. Also we could accept USD, RMB, Euro and other currency.
Q4. How about your after-sales service ?
A: 1.Provide customers with installation and commissioning online instructions.
2. Well-trained engineers available to overseas service.
3.Worldwide agents and after service avaiable.arrange our engineers to help you training and installation.
Q5. How about your warranty?
A: One year for the whole machine and two years for screw air end, except consumable spare parts.
Q6. Do you have any certificate ?
A: Yes, per different customer's market need ,we can offer CE ,ISO etc certificate.
Q7. What about the maintenance ?
A: First maintenance need to be done after 500Hours, and then every 2000-3000 hours to do the normal maintenance, and consider the actual environment.
Q8. How do you control quality ?
A: 1. The raw materials are strictly inspected
2. Some key parts are imported from overseas
3. Each compressor must pass at least 5 hours of continuous testing before leaving the factory.
Q9. Do you offer OEM service ?
A: Yes.Both OEM & ODM service can be accepted.
Q10.How long could your air compressor be used?
A: Generally, more than 10 years.
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