WS series oil-free water air compressors include the following models: DHH5WS, DHH7WS, DHH11WS, DHH15WS, DHH18WS, DHH22WS, DHH30WS, DHH37WS, DHH45WS, DHH55WS, DHH75WS, DHH90WS, DHH110WS, DHH132WS, DHH160WS, DHH185WS, DHH200WS, DHH220WS, DHH250WS. Features: ✅ Air supply range from 0.2 to 40.5 m3/min. ✅ Power from 5 to 250 kW. ✅ Working pressure from 0.8 to 1.25 MPa. ✅ Completely oil-free: provides clean, pollution-free, 100% oil-free compressed air. ✅ Water lubrication, sealing and cooling. Perfect isothermal compression. High efficiency (large air supply). Low rotation speed. Low noise, low vibration and no need to shift gears. Low viscosity of lubricating water. Easily separated from air. ✅ Pipes are completely made of stainless steel. Simple, non-corrosive, non-polluting, high reliability. ✅ Single-stage compression, high efficiency, energy saving and easy maintenance.