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If your equipment only needs compressed air below 0.5 bar, choosing a 2~5.5 bar low-pressure screw air compressor can save more than 30% of electricity compared to the common 8 bar screw air compressor. ROCKY's 2~5.5 bar low-pressure screw air compressor, which is specially tailored for the textile, cement, glass and other industries, has been fully recognized by the majority of users in terms of saving electricity.
Working principle of low-pressure screw compressor:
1. Inhalation: Air enters the spiral groove of the rotor at the inlet end.
2. Compression: As the rotor rotates, the air inlet is closed, the lubricating oil injection volume decreases and the gas pressure increases.
3. Exhaust: The compression process ends, the pressure is obtained, and the exhaust process begins.
Product features of low pressure screw air compressor
1. Adopt large rotor and low speed to ensure high performance of the machine.
2. Increase oil and gas separation equipment to ensure that the export oil content is ≤3ppm.
3. The air source of the low-pressure screw air compressor is clean, which reduces the number of cleaning nozzles of texturing machines and other equipment, and improves the quality of the finished product.
4. The heat dissipation area of the oil cooler is increased by more than 30% to ensure normal operation in summer without over-temperature;
5. Independently design the internal pressure ratio of the host to ensure a better specific power.
6. Intelligent control system, automatically adjust the exhaust volume according to the customer's usage (frequency conversion model).
7. For the texturing industry, ensure long-term continuous operation, set fault warnings, and do not stop immediately, so that customers are fully prepared for shutdown.
8. Adopting dual air outlet design, the air outlet temperature can be adjusted according to climate changes, meeting customer needs to a greater extent, and achieving high efficiency and energy saving at the same time.
Technical parameters
| 5.5 bar Low-pressure Two-stage PM VSD Screw Air Compressor | ||||||
| Model | Air Delivery (m3/min) | Power (kW) | Noise (Db) | Outlet diameter | Dimension (mm) | Weight (Kg) |
| 5.5 bar | L*W*H | |||||
| RL60APMII | 12.0 | 45 | 68 | DN65 | 2450*1700*1760 | 1450 |
| RL75APMII | 15.0 | 55 | 70 | DN65 | 2450*1700*1760 | 1800 |
| RL100APMII | 19.2 | 75 | 70 | DN65 | 2450*1700*1760 | 2000 |
| RL125APMII | 23.0 | 90 | 72 | DN80 | 2604*1904*1892 | 2700 |
| RL150APMII | 27.90 | 110 | 72 | DN80 | 2604*1904*1892 | 3200 |
| RL180APMII | 33.30 | 132 | 72 | DN100 | 3000x1900x1950 | 3100 |
| RL220APMII | 41.50 | 160 | 78 | DN100 | 3000x1900x1950 | 4400 |
| RL250APMII | 43.50 | 185 | 78 | DN125 | 3600x2200x2200 | 5500 |
| RL270APMII | 50.50 | 200 | 78 | DN125 | 3600x2200x2200 | 6000 |
| RL300APMII | 55.06 | 220 | 80 | DN150 | 4000x2300x2300 | 6800 |
| RL340APMII | 60.45 | 250 | 80 | DN150 | 4000x2300x2300 | 7500 |
Application industries of low-pressure screw air compressors
1. Glass industry
The application of low-pressure screw air compressors in the glass industry is mainly used for blowing bottles and glassware, blowing lamps and electronic tubes, burning gas, transmitting raw materials, glass etching, polishing and drilling, conveying glass, pneumatic control, and vacuum hanging plates.
2. Cement industry
Compressed air in the cement industry is mainly used for storage ventilation, cement slurry mixing, cement bag cleaning and sealing, raw material mixing, dump trucks, cleaning equipment, clinker cooling, cement and coal transportation, cement kiln cleaning, vehicle and ship loading and unloading, lifting and hoisting, pneumatic control
3. Cotton spinning and chemical fiber industry
The cotton spinning industry mainly uses air compressor compressed air as a power source, and has relatively high requirements for oil content. The main equipment is looms, spindles and other power equipment. The chemical fiber industry mainly uses air for instruments and suction guns. The main air-using equipment includes: jet looms, air-coated silk machines, texturizing machines, etc.
4. Water treatment industry
sewage treatment, fermentation, and foaming. The low-pressure screw air compressor series is a new type of compressor born under the national policy of energy conservation, emission reduction and environmental protection proposed by the state. It changes the traditional high-pressure compressor and decompresses the compressed air discharged by the compressor before delivering it to the air-using equipment. It causes a lot of energy waste.
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.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)
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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