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75HP 55kw Energy Saving Industrial Rotary PM VSD Two Stage Screw Air Compressors 
Permanent magnet variable frequency two stage screw air compressor:
1. Constant pressure control: It can realize high-precision constant pressure control with a pressure fluctuation range of 0.01 MPa;
2. Variable frequency soft start: Eliminate the peak current when starting, avoid grid impact, avoid current impact through step-by-step speed adjustment, and improve flexibility
3. Prevent no-load: The compressor is no-load during operation, reducing ineffective energy consumption;
Permanent magnet motors use high-efficiency rare earth magnets, no loss of magnetism at 180°C, and long service life; energy saving is about 6% to 7% compared with ordinary frequency conversion motors;
It can exert the highest efficiency in a wider range and make the air compressor more energy-saving.
Technical Parameters
| Model | Air Delivery (m3/min) | Power (kW) |
Noise (Db) |
Outlet diameter |
Dimension (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 |
Two stage air end
Feature:Two-stage compressor air-end
Advantage:Low compression ratio, Low temperature rising, Low air leakage
Benefit:15% energy-saving
High-efficiency Motor
Feature:IE4 permanent magnet motor/IE4 High-efficiency motor
Advantage:Motor efficiency 97%
Benefit:5% energy-saving
Intelligent control
Feature:VFD system
Advantage:Constant pressure output to remove pressure fluctuation and off-load, Constant temperature output at 9-~85°C, Low starting current to protect components
Benefit:15% energy-saving
Smart display screen
Feature:Intelligent control system
Advantage:10 inch monitor to show all the date
Benefit:Simple operation and touble free
Cooling fan
Feature:Large cooler system
Advantage:Axial flow Fan used for good cooling effect
Benefit:Allow ambient temperature at 52°C
Systematic Design of Oil separator
Feature:Large oil system
Advantage:Reduce internal pressure loss avoid oil, Leakage for safety
Benefit:3% energy-saving
Filter
Feature:Double filtering system
Advantage:Remove impurity from air and cleanness
Benefit:Longer life air -end and lubrication oil
Air inlet valve
Feature:High vacuum degree:700mmHg
Advantage:Large suction area, Low load energy consumption in unloaded operation,
Fast check: prevent unloading and shutdown oil injection
Benefit:Cast aluminum to avoid rust and temperature change
Packaging & Shipping
Shanghai Rocky Machinery Co., Ltd. is a company dedicated to the production and research and development of various gas compression equipment. The company was established in 2012 and has a total of 5 licensed technical engineers. Mainly engaged in air, nitrogen, CO2 and other special gas compression equipment and after-treat equipment. With the development in recent years, the company has established a foreign trade team in Shanghai, and hired foreign trade consultants with 10 years of industry experience to better serve customers worldwide. With excellent quality and the support of 30 distributors worldwide, our annual sales in 2018 exceeded 5 million US dollars. We look forward to working with you to create a better tomorrow!
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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