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The 37kW/50HP PM VSD screw compressor combines an IE4/IE5 permanent magnet motor with variable-speed drive to adjust output in real time, saving energy over fixed-speed units. Direct‑drive design eliminates belts for 100% efficiency and lower maintenance. It delivers 1.86–6.2 m³/min at 7–13 bar, with a compact footprint (~1300×930×1250 mm) and ~560 kg weight. It unifies PM motor efficiency, VSD regulation, and smart control for precise, on‑demand air with minimal waste.
Product features
⚡ Energy Efficiency – Save 20%–50%
IE4/IE5 PM motor + VSD cuts energy use by 20%–50% vs. fixed‑speed. PM motor efficiency reaches 97% (5–12% higher than asynchronous), and remains ~96% at partial load. Fixed‑speed units waste 30–70% during idle – VSD eliminates this. Energy savings in 3 years can equal the compressor’s purchase cost.
Precise Pressure Control – ±0.1 bar
Stepless speed regulation (15%–100% capacity) with PID control holds pressure fluctuation within ±0.1 bar – essential for laser cutting, semiconductor, painting, and injection moulding.
Ultra‑Quiet Operation – 62–68 dB(A)
Runs at 65±2 dB(A) (as low as 62 dB) – significantly quieter, ideal for floor‑placement without soundproof enclosures.
⚙️ Direct‑Drive – Zero Loss, Less Maintenance
No belts, gears, or couplings – 100% transmission efficiency, fewer wear parts, and maintenance intervals >8,000 hours. Lower downtime and TCO.
Compact & Space‑Saving
Smallest footprint: 1300 × 930 × 1250 mm – fits tight workshops; optional side‑mounted receiver reduces space further.
️ Heavy‑Duty Reliability
Cast‑iron housing, premium bearings, 24/7 continuous duty, 100,000‑hour design life; PM motor withstands 180°C to prevent demagnetisation; CE certified.
Smart Controller – Intelligent Monitoring
Touchscreen with real‑time data, fault alarms, auto‑restart, IoT remote access, and multi‑machine linkage for optimal system efficiency.
Technical Parameters
| Model | RK50APM |
| Air Delivery | 2~6.2m3/min |
| Power | 37kw/50hp |
| Noise | 70 dB(A) |
| Outlet diameter | G2 |
| Dimensions | 1500*1000*1350mm |
| Weight | 650kg |
Application Industries
The 37kW/50HP PM VSD screw air compressor is widely used across diverse industrial sectors due to its energy efficiency, pressure stability, and intelligent control capabilities.
General Manufacturing
Powering pneumatic tools, assembly lines, and material handling systems
Injection molding machines and plastic processing equipment
Metal stamping, forging, and machining operations
Automotive Industry
Painting and spraying booths – stable pressure ensures coating uniformity
Assembly line pneumatic systems and tire production
Welding stations and body shop operations
Electronics & Semiconductor
Clean, dry compressed air for dust-free workshops and precision component manufacturing
Semiconductor production and circuit board assembly
Lithium battery production – polar roller press pneumatic systems
Food & Beverage
Packaging, bottling, and labeling lines
Sterile packaging and fermentation tank aeration
Hygienic air for conveying and processing
Pharmaceutical Industry
Pneumatic control for pharmaceutical production lines (GMP compliant)
Mixing, tablet pressing, and fermentation processes
Class 0 oil-free air applications where air quality is critical
Textile & Garment
High-speed air-jet looms and pneumatic yarn drop machines
Spinning, dyeing, and textile machinery
Cluster gas supply for textile production lines
️ Construction & Mining
Powering heavy-duty pneumatic tools and equipment
Sandblasting and dust collection systems
⚡ Energy & Chemical
Instrument air for valve control and automation equipment
Chemical production – pneumatic pumps, agitators, and reactor pressurization
Thermal power plants and photovoltaic manufacturing
Packaging & Printing
Film blowing, labelling, and carton erecting
Printing shops and advertising companies
Why Choose Our 37kW/50HP PM VSD Screw Compressor?
✅ Unmatched Energy Savings
With energy costs accounting for the majority of a compressor's lifetime operating expenses, our PM VSD technology delivers 20%–50% electricity savings compared to fixed-speed alternatives. The high-efficiency permanent magnet motor (IE4/IE5 class) maintains peak performance across a wide operating speed range, ensuring savings even during partial load conditions.
✅ Superior Precision & Quality
The ±0.1 bar pressure accuracy ensures consistent production quality – reducing scrap rates, improving product uniformity, and protecting sensitive downstream equipment from pressure spikes.
✅ Lower Total Cost of Ownership
Reduced energy bills – immediate and ongoing savings
Extended maintenance intervals – up to 8,000+ hours between services.
Fewer replacement parts – no belts, gears, or couplings to wear out.
Longer equipment life – 100,000+ hours design life.
Reduced downtime – intelligent fault diagnostics prevent unexpected failures.
✅ Quiet & Workspace-Friendly
At just 62–68 dB(A), this compressor can be installed directly on the production floor without the need for expensive soundproof rooms or remote compressor houses. The compact footprint further maximizes valuable workshop space.
✅ Smart & Connected
The intelligent touchscreen controller with IoT connectivity enables remote monitoring, predictive maintenance, and data-driven optimization. Multi-machine linkage control ensures your entire compressed air system operates at peak efficiency.
✅ Built for Heavy-Duty Continuous Operation
Engineered for 24/7 industrial duty cycles, this compressor handles fluctuating air demands with ease. The rugged construction, premium bearings, and intelligent thermal management ensure reliable performance even in demanding environments.
✅ Global Compliance & Support
CE certified and built to international standards. Backed by comprehensive after-sales support including 1-year free maintenance parts warranty.
FAQS
Q1: What is a PM VSD screw air compressor?
A: It combines a permanent magnet motor with variable speed drive to automatically match motor speed to air demand – saving energy and ensuring precise pressure control vs. fixed‑speed units.
Q2: How much energy can I save?
A: Typically 20%–50% vs. fixed‑speed. Greater savings with fluctuating demand. In many cases, 3‑year energy savings equal the compressor’s purchase cost.
Q3: What are the main advantages over fixed‑speed?
A: 20%–50% lower energy, ±0.1 bar pressure accuracy, quieter operation (65 dB vs. 80+), soft starting reduces mechanical stress, longer life, and lower maintenance. Fixed units waste 30%–70% idle power – VSD eliminates that.
Q4: What maintenance is required?
A: Routine oil/filter changes and inspections. Direct‑drive design (no belts/gears) and VSD operation extend intervals to over 8,000 hours.
Q5: Can it run 24/7 continuously?
A: Yes – engineered for heavy‑duty continuous duty with a 100,000‑hour design life and intelligent system protection.
Q6: What pressures and flow rates?
A: Standard 7–13 bar with free air delivery 1.86–6.2 m³/min. Other combinations available – consult our team for your exact needs.
Q7: How loud is it?
A: Only 62–68 dB(A) – quiet enough for floor installation without soundproofing.
Q8: Can I monitor it remotely?
A: Yes – IoT‑enabled smart controller provides real‑time monitoring, operational reporting, and fault diagnostics from any device.
Q9: What is the delivery time?
A: Standard delivery 7–15 working days after payment. Custom orders may take longer – contact sales for specifics.
Q10: What warranty and support do you offer?
A: 1‑year free maintenance parts and 5–10 year airend warranty. 24/7 technical support, installation guidance, commissioning, and ongoing service.
Ready to save energy and improve production stability? Get a tailored quote now.
