RMC-125VSA 90KW 125HP 7BAR 8BAR 10BAR 13BAR PERMANENT MAGNET VFD SCREW AIR COMPRESSOR
1. Model: RMC-125VSA  /  2.Type: Single stage Stationary screw air compressor   / 3.Air flow capacity: 16.1/15.5/13.8/12.3m3/min
4.Discharge pressure: 0.8/1.0/1.3 Mpa  / 5. Power:90kw 125hp  / 6. Driven type: direct driven, variable speed frequency start
7. Motor: IP23/IP65  / 8. Cooling: by air  / 9. Dimension:1800x1230x1570mm  / 10. Weight: 1900kg
11. Discharge connection: G2"

Permanent magnent VFD screw air compressors

1. Basic Working Principle  
A permanent magnet screw air compressor is a type of industrial air compressor that combines rotary screw compression with a permanent magnet motor for higher efficiency and performance.
2. Advantages 
A screw compressor with a permanent magnet motor + inverter (VFD/VSD) is basically the most energy-optimized version of a rotary screw system. The combination gives you advantages that neither feature alone can fully deliver.Here’s what you actually gain:
1. Maximum energy efficiency  •Permanent magnet motors eliminate rotor losses found in induction motors  •The inverter adjusts speed instead of running full power constantly  •Together, they can cut energy use by 20–40%, especially under variable load,  This is the biggest reason companies switch—electricity is the main operating cost.
2. True variable output (no waste) Unlike fixed-speed compressors that: run at full speed, then unload (wasting energy)., a PM + inverter system: matches air production exactly to demand, That means: no blow-off losses, no unnecessary idling, consistent system efficiency.
3. Lower operating costs over time  You save money through: reduced power consumption, fewer start/stop cycles, less mechanical stress. Even though the upfront price is higher, the total cost of ownership is lower.
4. Reduced mechanical wear  •Soft start from the inverter (no current spikes) •Smooth speed control (less vibration)  •Direct-drive PM motors often eliminate belts/gears
Result: •longer lifespan •fewer breakdowns
5. Quieter operation  •No sudden load/unload noise  •Lower average RPM  •Fewer mechanical transmission parts,  This is especially useful in workshops or indoor installations.
6. Better pressure stability  Instead of pressure fluctuating: •the inverter maintains tight pressure control,  That helps: •improve tool performance •reduce defects in production processes
7. Improved performance at low loads  This is where the combo really shines: •Traditional compressors become inefficient at partial load •PM + inverter systems stay efficient even at 20–50% capacity
8. Lower starting current  •Inverter provides soft start  •Avoids high inrush current (which can be 6–8× in standard motors),  Benefits: •less stress on electrical systems •smaller generators/transformers needed
9. Smart control & monitoring  Most inverter systems include: •digital controllers •fault diagnostics •remote monitoring options

General parameter list

Product Description

1. Screw air compressor complete unit

2. Fixed speed electric motor with IP55

3. Hanbell air end with two years warranty

4. Electric cabinet of the screw air compressor, with original schneider contactor, and minature circuit breaker to protect the air compressor from electric surgy, much more safer.

5. Pressure gauge of the screw air compressor, we added pressure gauge from 5.5kw and above.
6. Sound proof, Advanced honeycomb sound-absorbing design ensures lower noise, better airflow, and enhanced machine performance.
7. Oil drainer, convenient for mainteance.
8. Intake valve, high performance air inlet valve with intelligent control system, ensuring precise airflow regulation, energy-saving oeperation, fast respinse, and enhanced system stability, the optimized structure effectively reduces noise and prevents backflow, extending the overall service life of the compressor.

9. Oil sight glass,  clear visual monitoring, provides a clear and direct view of the oil level from the air compressor, allows operators to monitor oil condition instantly, prevents low oil lecel operation and reduces risk of amage from the air compressor, seasy maintenance, leak-proof design, high temperature and pressure resistance, extends the overall service life of the air compressor.
10. Thermostatic valve,  option of screw air compressors from 5.5kw to 45kw, standard configuration of screw air compressors 55kw and above. High-performance thermostatic valve designed to maintain optimal oil temperature under all operating conditions, it ensures fast and precise thermal response, automatically regulating oil flow to prevent overheating and overcooling, this results in improved system efficiency, enhanced operational statility, and extened service life of key components of air compressors.

Our Services

1. Pre-Sales Services, Technical Consultation• Compressed air demand analysis (CFM / m³/min)• Pressure selection (7 bar, 8 bar, 10 bar, 13 bar, 20 bar etc.)• Application matching (laser cutting, textile, food, mining)

System Design• Complete compressed air station planning• Equipment selection:• Rotary Screw Air Compressor• Refrigerated Air Dryer• Desiccant Air Dryer• Air Receiver Tank• Precision Air Filter

Energy Saving Proposal• VSD / VFD solution• Heat recovery system• Energy consumption calculation

2. Sales & Supply Services• OEM / ODM manufacturing• Custom voltage (380V / 400V / 415V / 220V / 460V)• CE, ISO certification support• Export packing (wooden case, steel base frame)• International shipping & documentation

3. After-Sales Service, Routine Maintenance • Air filter replacement• Oil filter replacement• Separator replacement• Lubricant oil change

Technical Support• Remote troubleshooting• Spare parts supply• Maintenance manuals (English / Russian / Spanish)

Major Overhaul• Airend repair• Motor maintenance• Controller upgrade

4. Our product range 1. Oil-injection Screw air compressor (single stage compression, two stage compression, high pressure and low pressure.) 2. Dry Oil-free Screw air compressor 3. Oil-free water lubricated screw air compressor 4. Oil-free scroll air end and scroll air compressor 5. Oil-free/Oil-lubricated piston compressor 6. Diesel engine Screw air compressor 7. Oxygen/Nitrogen generators/boosters 8. High Pressure Breathing Air Compressor 9. Refrigerant air dryer/ Desiccant air dryer 10. Precision line filter/ water separator 11. High pressure piston air compressors and air booters. 12. Oil free screw blowers 13. 16bar 20bar screw air compressor set

Company Information

Shanghai Royal Machinery Co.,Ltd is a professional company of industrial air compressors, air treatment and air compressor spare parts, with engineers and sales people who have over 8 years experience, Royal Machinery has two business divisions, one is our own brand products, the other brands are Ingersoll Rand and Compair products. We have been marketing industrial compressed air equipment to global market since 2017 and the main assembling plants cover more than 50,000 square meters and 320 employees. The range of our compressors supplying start from the smallest compressors used by individuals to very large compressors used in heavy industrial applications. We started the business as a close partner to our customers, our sales team can provide you competitive price with high quality products, with our customers supporting, our team will get all the orders fulfilled on time and provide you excellent after-sales service. Our product range represents the most comprehensive portfolio of compressed air equipment offered for thousands of applications in the Oil, Textile, Food, Marine, Mining 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, CNG compressors and CNG related equipment, also high pressure scuba air compressors. Our mission is to bring China assembled compressors of good quality and service, with attractive price for all the customers all over the world. You are welcomed to be developed with us together for a fruitful future.

Wecome to contact us for more details, we will offer compressor details, oil free screw air compressor use manual,  oil free screw air compressor configuration list, oil free screw air compressor instruction drawings, spare parts list,  installation drawings, technical support and maintenance training. 

FAQ

1. What's the warranty of your air compressors

we give screw airend 2 years warranty, complete compressor unit 1 year;  oil-free scroll air compressors we give 2 years warranty.

2. Can you do OEM?

Yes, we accept OEM and ODM orders for all our air compressors.

3. What is the delivery time of the air compressor?

It depend on customer order quantity, for regular voltage and pressure air compressors, our lead time 7 days, if big quantity we need 10-20days to prepare.

4. What's the MOQ

We accept all of our air compressors MOQ 1 unit.

5. Can your air compressors work at high ambient temperature like 50℃ above please?

Yes, our oil injection screw air compressors are support to work at high temperature environment, for oil-free water-lubrication screw air compressors, we will design it to be with air cooling or water cooling according to ambinet temperature.

6. Can your air compressor work at low temperature like -20℃ below?

Yes our air compressor is working very good in area like North of China and Russia.

7. Do you have installation or maintenance video?

Yes, we can offer our air compressor installation and maintenance video to customers.