100% oil-free screw blowers for the wastewater industry

A screw blower is a positive displacement blower that uses intermeshing helical rotors (usually a male rotor and a female rotor) rotating at high speed within a casing. The rotor teeth continuously me

  • Working Pressure:0.4~2[ bar ]5.8~29[ psig ]
  • Free Air Delivery:3.2~188[ cfm ]113~6637[ m3/min ]
  • Working Power:5.5~400[ kw ]7.5~535[ hp ]

Product Details

RK100BPM (3).jpg


Product features

1. High Efficiency and Energy Saving

◦ Core Advantages: Utilizing internal compression and an optimized profile design, this product boasts significantly higher efficiency than traditional Roots blowers, particularly at higher pressures, achieving significant energy savings (typically 20%-35%).

2. Low Noise and Vibration

◦ The screw engagement is smooth and continuous, without impact, resulting in significantly lower operating noise and vibration than Roots blowers, and no special foundation installation is required.

3. Stable, Pulsation-Free Output

◦ Providing continuous, smooth airflow, this product avoids the inherent pulsation associated with Roots blowers, making it more user-friendly for pipe networks.

4. Integration and Intelligent Control

◦ Modern screw blowers often integrate the main unit, motor, inverter, inlet and outlet silencers, and control system into a single unit ("one-stop blower").

◦ Variable frequency control is commonly used, enabling easy adjustment of air volume and pressure, enabling on-demand air supply and further energy savings. 

5. Easy Maintenance and High Reliability

◦ The compact structure and long engine life are designed. Core components (such as the engine head) generally require no routine maintenance, requiring only regular replacement of lubricating oil and air filters.

Technical Parameters

Oil-free Screw Blower BPM Series
          Model            
Power
(kW)
Pressure(bar/kPa)
Volume flow(m³/min)
     
 Pipe Diameter
Weight(kg) 
Dimension
(mm)
RK7.5BPM5.50.4/404.0 DN1507001400×1100×1360
0.6/603.2 
RK10BPM7.50.4/406.4 DN1507501400×1100×1360
0.6/604.6 
0.8/803.5 
RK15BPM110.4/409.0 DN1508001400×1100×1360
0.6/607.5 
0.8/806.0 
1.0/1004.8 
1.2/1204.0 
1.5/1502.8 
RK20BPM150.4/4013.6 DN15012002200×1250×1900
0.6/6010.5 DN1508001400×1100×1360
0.8/808.3 
1.0/1006.7 
1.2/1205.8 
1.5/1504.5 
RK25BPM18.50.4/4016.2 DN15012502200×1250×1900
0.6/6013.1 
0.8/8010.3 DN1508001400×1100×1360
1.0/1009.2 
1.2/1207.5 
1.5/1506.0 
RK30BPM220.4/4022.0 DN15012502200×1250×1900
0.5/5019.0 
0.6/6016.0 
0.7/7014.5 
0.8/8013.0 
1.0/1009.5 DN1508501400×1100×1360
1.2/1208.8 
1.5/1507.0 
RK40BPM30
0.4/4029.0 DN20017502700×1400×1900
0.6/6026.0 DN15012502200×1250×1900
0.7/7023.5 
0.8/8021.5 
1.0/10015.8 
1.2/12012.5 
1.7/1707.5 DN1508001400×1100×1360
RK50BPM37kW
0.4/4038.0 DN20017502700×1400×1900
0.5/5035.0 
0.6/6032.0 
0.8/8026.0 DN15012502200×1250×1900
1.0/10021.5 
1.2/12015.5 
1.5/15012.5 
RK60BPM45kW0.4/4044.0 DN20017502700×1400×1900
0.5/5042.0 
0.6/6038.0 
0.8/8033.5 
1.0/10026.0 DN15013002200×1250×1900
1.2/12021.0 
1.5/15015.5 
1.7/17012.7 
RK75BPM55kW0.4/4055.0 DN20018002700×1400×1900
0.6/6048.0 
0.7/7044.0 
0.8/8041.5 
1.0/10035.0 1750
1.2/12031.0 
1.5/15021.0 DN15013502200×1250×1900
1.8/18016.5 
2.0/20014.5 
RK100BPM75kW
225S/M
0.4/4078.0 DN25022003100×1500×2150
0.6/6068.0 
0.7/7061.0 
0.8/8055.0 DN20018002700×1400×1900
0.9/9051.0 
1.0/10047.0 
1.2/12042.5 
1.5/15034.0 1750
1.8/18027.0 
2.0/20024.5 DN15014002200×1250×1900
RK125BPM900.4/4098.0 DN30025503300×1750×2350
0.6/6078.0 DN25022003100×1500×2150
0.8/8068.0 
1.0/10061.0 
1.2/12050.0 DN20018502700×1400×1900
1.5/15042.0 
1.8/18034.0 
2.0/20030.5 
RK150BPM1100.4/40113.0 DN30026003300×1750×2350
0.6/6092.0 
0.8/8078.0 
1.0/10067.5 DN25022503100×1500×2150
1.2/12060.0 
1.5/15049.0 
1.8/18041.5 
2.0/20037.5 
RK180BPM1320.6/60112.0 DN30026003300×1750×2350
0.8/8098.0 
1.0/10081.0 
1.1/11073.0 
1.2/12071.0 DN25023003100×1500×2150
1.5/15058.0 
1.8/18048.0 DN20019002700×1400×1900
2.0/20044.0 
RK220BPM1600.4/40180.0 DN30035003600×2100×2350
0.6/60130.0 
0.8/80111.0 DN30027503300×1750×2350
1.0/100101.0 
1.1/11089.0 
1.2/12080.0 
1.5/15070.0 DN25023003100×1500×2150
RK250BPM1850.4/40203.0 DN30035003600×2100×2350
0.6/60154.0 
0.8/80129.0 
1.0/100110.0 DN30028003300×1750×2350
1.2/12096.0 
1.5/15083.0 
1.8/18066.5 
RK270BPM2000.4/40212.0 DN30036003600×2100×2350
0.6/60177.0 
0.8/80144.0 
1.2/120110.0 DN30028003300×1750×2350
1.5/15090.0 
1.8/18076.0 
2.0/20066.0 
RK300BPM2200.6/60196.0 DN30036003600×2100×2350
0.8/80159.0 
1.0/100127.0 
1.5/150100.0 DN30028003300×1750×2350
1.8/18086.0 
2.0/20073.0 
RK350BPM2500.6/60220.0 DN30038003600×2100×2350
0.8/80182.0 
1.0/100150.0 
1.2/120125.0 
1.5/150109.0 DN30027003300×1750×2350
1.8/18095.0 
2.0/20085.0 
RK380BPM2800.8/80206.0 DN30039003600×2100×2350
1.0/100178.0 
1.1/110162.0 
1.2/120148.0 
RK420BPM3151.0/100195.0 DN30040003600×2100×2350
1.2/120170.0 
1.5/150130.0 
RK480BPM3551.2/120192.0 DN30041003600×2100×2350
1.5/150160.0 
RK540BPM4001.5/150188.0 DN30042003600×2100×2350