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Product Definition
The 25~30 bar two-stage PM VSD screw compressor delivers energy-efficient, precision-controlled medium-high pressure air – a modern replacement for traditional piston compressors in PET blowing, laser cutting, and heavy industrial applications.
Technical Specifications
| Medium-pressure 25-30 bar Two-Stage Permanent Magnet Variable Speed RKH-APMII Series | ||||||||
| Model | Air Delivery (m3/min) | Power (kW/hp) | Noise dB(A) | Outlet diameter | Dimensions (mm) | Weight (kg) | ||
| 25 bar | 30 bar | L * W * H | ||||||
| RKH15APMII | 0.9 | / | 11/15 | 65 | G3/4 | 1000*750*1070 | 200 | |
| RKH20APMII | / | 1.0 | 15/20 | 65 | G3/4 | 1000*750*1070 | 210 | |
| RKH30APMII | / | 2.0 | 22/30 | 68 | G1 | 1100*850*1110 | 320 | |
| RKH40APMII | 3.0 | 2.1 | 30/40 | 68 | G1 | 1100*850*1110 | 330 | |
| RKH50APMII | / | 3.2 | 37/50 | 68 | G1 1/2 | 1200*1000*1350 | 620 | |
| RKH75APMII | 3.0 | 2.1 | 55/75 | 76 | G2 | 2100*1440*1650 | 1500 | |
| RKH100APMII | 7.0 | 6.6 | 75/100 | 76 | G2 | 2100*1440*1650 | 1600 | |
Medium-Pressure 25–30 bar Two-Stage PM VSD Screw Compressor
Two-Stage – 15–20% Savings – Lowers pressure ratio per stage, cuts leakage, boosts efficiency over single-stage units.
PM VFD – 20–40% More – Adjusts speed to actual demand. Combined savings: 25–35% typical, up to 45% optimal. No idle loss.
Stable 25–30 bar – Delivers 362–435 PSI. Replaces medium-pressure piston compressors reliably.
Lower Discharge Temp – Inter-stage cooling reduces thermal stress on bearings, seals, and rotors – extends life, cuts downtime.
More Air at Same Power – Up to 15% higher FAD than single-stage – boosts output without electrical upgrades.
±0.1 bar Precision – VFD holds pressure steady, eliminates fluctuations for consistent quality.
Soft Start – No inrush current, reduces electrical stress, extends motor life, lowers utility charges.
Low Noise – Lower compression ratio and PM motor reduce vibration and noise – ideal for sensitive environments.
Built for 24/7 – Optimized inter-stage design ensures stable performance under variable demand, longer life, fewer failures.
Piston Replacement – Smoother, lower maintenance, far more efficient than traditional medium-pressure piston units.
Main Application Industries
PET Bottle Blowing & Beverage Packaging – Stable 25–30 bar air for PET preform blow molding. Consistent pressure ensures uniform wall thickness, reduces reject rates.
Laser Cutting & CNC Machining – High-pressure, clean air for laser assist gas and CNC pneumatics. ±0.1 bar precision protects cutting quality.
Mining, Drilling & Geothermal – Powers DTH drills, rock drills, and exploration equipment. Available in portable and stationary configurations.
Petrochemical & Natural Gas – Drives pneumatic valves, instruments, and process controls. Reliable 24/7 operation for critical environments.
Hydropower & Energy – Supplies air for turbine starting, penstock purging, and control systems in hydroelectric plants.
Food Processing – Clean, stable high-pressure air for tablet compression, capsule filling, and food packaging lines.
Textile, Cement & Glass – Powers pneumatic conveying, weaving looms, and glass forming processes.
General Heavy Industry – Ideal for pneumatic tools, material conveying, pressure testing, and any 25–30 bar application.
