Two Stage Permanent Magnet VSD Screw Air Compressor Energy Saving 30% for Industrial Factory

Two Stage Permanent Magnet Variable Frequency Screw Air Compressor – An energy-efficient industrial compressor combining two-stage compression, IE5 permanent magnet motor, and VFD speed control. Deliv

  • Working Pressure:7~13 [ bar ]101.5~188.5[ psig ]
  • Free Air Delivery:10.3~31.2[ cfm ]364~1101[ m3/min ]
  • Working Power:185[ kw ]250[ hp ]
PRODUCT
GALLERY

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Product Details

RK250APMII (9).jpg

Product features

  •  Core Technology & Energy Efficiency
    Two-stage compression with IE5 permanent magnet motor reduces internal leakage, improves volumetric efficiency by 8%–15%, and delivers over 30% energy savings versus conventional single-stage screw compressors under variable loads.

  • Precision Air Pressure Control
    VFD with PID algorithm stabilizes pressure within ±0.1 bar, preventing spikes that affect precision manufacturing, electronics, food processing, and textile applications. Stable supply from 25% to 100% load.

  • Low Inrush Current & Soft Start
    VFD soft start limits inrush current to 1.2–1.5× rated current (vs. 6–8× for direct-on-line starters), protecting electrical grids and reducing mechanical stress on gears and bearings.

  • Low Noise & Low Vibration
    Large-diameter screws operate at low speed with acoustic insulation. Noise levels suitable for indoor installation without a separate compressor room; extended bearing life due to reduced load.

  •  Smart Monitoring & Remote Connectivity
    RS485 port and Modbus RTU protocol allow connection to factory EMS or PLC. Remotely monitor discharge temperature, pressure, motor current, and running hours for predictive maintenance and reduced downtime.


Technical Parameters

Two-stage PM VSD Screw Air Compressor
Model

Air Delivery

(m³min)

Power
(kW/hp)		Noise
dB(A)		Outlet
diameter		Dimensions
(mm)		Weight
(kg)
7 bar8 bar10 bar13 bar

L*W*H

RK30APMII1.4-4.51.3-4.21.1-3.50.8-2.7  22/3068 G1121350*850*1110600 
RK40APMII1.8-6.01.7-5.91.4-4.7  1.2-4.0  30/4068 G1121200*1000*1350700 
RK50APMII2.3-7.52.1-6.91.8-6.0  1.6-5.4  37150 68 G1121500*1000*1350750 
RK60APMII3.2-10.53.0-9.92.3-7.8  2.0-6.8  45/6072 G22100*1300*16501250 
RK75APMII4.1-13.63.8-12.53.0-10.1  2.3-7.5  55175 76 G22100*1300*16501300 
RK100APMII4.8-16.04.7-15.53.8-12.83.1-10.2  75/10076 G22100*1300*16501350 
RK125APMII6.2-20.75.9-19.54.8-16.24.2-14.0  90/12576 DN802500*1650*19002700 
RK150APMII7.4-24.87.2-24.06.1-20.24.8-16.0110/15076 DN802500*1650*19002800 
RK175APMII8.7-29.08.4-28.07.1-23.75.7-19.0132/17578 DN802500*1650*19003000 
RK220APMII10.2-34.09.8-32.58.4-28.06.9-23.0160/22078 DN803000*1900*19504300 
RK250APMII11.7-39.010.8-36.09.6-32.08.3-27.5185/25078 DN803000*1900*19504400 
RK275APMII13.1-43.512.3-41.010.7-35.59.5-31.5200/27578 DN1003600*2200*22005000 
RK300APMI15.5-51.514.5-48.311.6-38.510.7-35.5220/30082 DN1003600*2200*22005500 
RK350APMII16.2-54.015.3-51.013.5-45.011.4-38.0250/35082 DN1003600*2200*22006000 
RK375APMII18.0-60.017.1-57.015.0-50.012.9-43.0280/37582 DN1253600*2200*22006800 
RK420APMII19.5-65.018.6-62.016.8-56.015.2-50.5315/42082 DN1254200*2300*23508000 
RK480APMII22.5-75.021.9-73.019.2-64.016.5-55.0355/48082 DN1504200*2200*23508500 


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