Two-Stage Screw Air Compressor
The PM VSD two-stage screw air compressor uses a two-stage air end: air is compressed in the first stage, cooled in the intercooler, and then compressed in the second stage. The process runs close to isothermal compression, which cuts compression work and internal leakage. A permanent magnet motor and variable frequency drive adjust speed to the actual air demand.
Product Features
Two-stage compression, higher efficiency
Intercooling between the two stages keeps compression close to isothermal, improving volumetric efficiency and lowering the compression ratio.
About 15% energy saving
Compared with a single-stage air end, air flow increases by about 15% and energy consumption drops by around 15%.
Variable speed, on-demand air
The PM VSD system matches speed to air demand, reducing idle running and pressure fluctuation.
Smooth and quiet
Two-stage compression balances loads on the main shaft and bearings, with noise from about 68 dB(A).
Reliable and easy to maintain
Less leakage and wear mean a longer air end life, and the compact layout keeps service simple.
Technical Specifications
| Model | Power kW | Air flow m³/min (0.8 / 1.0 / 1.2 MPa) |
Noise dB(A) | Dimensions L×W×H mm | Weight kg | Outlet |
|---|---|---|---|---|---|---|
| RH-PM22T2D | 22 | 4.3 / 4.1 / 3.3 | 68±2 | 1500×1030×1260 | 589 | G1 |
| RH-PM30T2D | 30 | 6.3 / 5.7 / 4.1 | 68±2 | 1660×1115×1400 | 810 | G1½ |
| RH-PM37T2D | 37 | 7.3 / 7.4 / 5.2 | 68±2 | 1660×1115×1400 | 848 | G1½ |
| RH-PM45T2D | 45 | 10.0 / 9.1 / 7.3 | 74±2 | 2180×1390×1660 | 1800 | G2 |
| RH-PM55T2D | 55 | 12.5 / 11.6 / 9.0 | 74±2 | 2180×1390×1660 | 1860 | G2 |
| RH-PM75T2D | 75 | 16.0 / 15.2 / 11.5 | 74±2 | 2180×1390×1660 | 1960 | G2 |
| RH-PM90T2D | 90 | 20.0 / 16.9 / 13.5 | 74±2 | 2500×1630×1930 | 2360 | G2½ |
| RH-PM110T2D | 110 | 23.0 / 19.7 / 18.7 | 78±2 | 2500×1630×1930 | 2390 | G2½ |
| RH-PM132T2D | 132 | 27.0 / 25.9 / 20.9 | 78±2 | 2500×1630×1930 | 2445 | G2½ |
| RH-PM160T2D | 160 | 32.0 / 30.8 / 23.7 | 82±2 | 3630×2160×2310 | 3800 | DN100 |
| RH-PM185T2D | 185 | 39.0 / 31.8 / 30.5 | 82±2 | 3630×2160×2310 | 4100 | DN100 |
| RH-PM200T2D | 200 | 41.0 / 35.2 / 31.53 | 84±2 | 3630×2160×2310 | 4800 | DN100 |
| RH-PM220T2D | 220 | 44.0 / 39.6 / 34.87 | 84±2 | 3630×2160×2310 | 5100 | DN100 |
| RH-PM250T2D | 250 | 52.0 / 45.0 / 39.2 | 84±2 | 3630×2160×2310 | 5600 | DN100 |
Note: figures are for standard conditions (380V/50Hz/3Ph, ambient -5~+45°C, air cooled, discharge temperature ≤ ambient +15°C, direct drive, VSD start; voltage customizable). Final data is subject to the technical agreement.
Applications
Machinery, textile, chemical, food and beverage, pharmaceutical, electronics, building materials and mining — where air demand is high and continuous.
Recommended Configuration
An air receiver tank, refrigerated air dryer and precision filters can be matched to your pressure, air flow and site conditions to build a stable, clean and energy-efficient compressed air system.
RuiWo Service
RuiWo advises on the right two-stage compressor and configuration for your air demand, pressure, voltage and working environment, helping lower your cost per cubic meter of air.