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The ONH Systems Company manufactures medical compressed air units equipped with refrigerator or adsorption compressed air dryers, which allow high-quality air preparation up to class 1 according to the DIN ISO 8573-1:2016 standard.

Units are designed for use in healthcare facilities as a compressed air source for centralized gas supply systems, where compressed air is required for various medical equipment operations, e.g., artificial pulmonary ventilation machines, medical pneumatic tools, dental equipment, etc. Units provide compressed air continuous flow with required pressure and purity in automatic mode.

Medical Compressed Air Unit Composition with Refrigerator or Adsorption Dryer

  1. ACS cabinet
  2. Screw air compressor
  3. Refrigerator/adsorption dryer
  4. Main line air filters
  5. Compressed air receivers
  6. Antibacterial filters
  7. Water-oil separator

Additional Options

  • 5 or 8 bar reducer assembly;
  • charcoal column;
  • outlet air pressure sensors;
  • outlet air dew point sensor;
  • outlet air temperature sensor;
  • outlet air flowmeter.

Technical Specifications

Model range information on refrigerator dryers:

Model Demand, m3/hour Max. operating pressure, MPa
Main Line Redundant Line Emergency Line
МСВ-5,5-10-РД 33 33 33 1,0
МСВ-7,5-10-РД 54 54 54
МСВ-11-10-РД 87 87 87
МСВ-15-10-РД 115 115 115
МСВ-18,5-10-РД 145 145 145
МСВ-22-10-РД 184 184 184
МСВ-30-10-РД 258 258 258
МСВ-37-10-РД 337 337 337
МСВ-45-10-РД 400 400 400
МСВ-55-10-РД 526 526 526
МСВ-75-10-РД 664 664 664

Model range information on adsorption dryers:

Model Demand, m3/hour Max. operating pressure, MPa
Main Line Redundant Line Emergency Line
МСВ-5,5-10-АД 28 28 33 1,0
МСВ-7,5-10-АД 45 45 54
МСВ-11-10-АД 73 73 87
МСВ-15-10-АД 97 97 115
МСВ-18,5-10-АД 122 122 145
МСВ-22-10-АД 156 156 184
МСВ-30-10-АД 219 219 258
МСВ-37-10-АД 286 286 337
МСВ-45-10-АД 340 340 400
МСВ-55-10-АД 447 447 526
МСВ-75-10-АД 564 564 664

Dew point temperature: up to -40 °C

Operation Principle

Oil-filled screw compressors are used as a source of compressed air in the unit.

Compressors are designed to supply Class 1 compressed air with a capacity of 27 to 451.8 m3/hour, as well as to supply air for valve actuators instrumentation.

When leaving the compressor, air passes through a cyclone separator, which significantly reduces the overall load on mainline filters and also retains oil particles.

After the cyclone separator, the compressed air with saturated vapor enters a refrigerated dryer to reduce compressed air moisture content.

For units with adsorption dryers, after the cyclone separator, the compressed air enters the adsorption dryer, which is designed to remove moisture contained in compressed air produced by the air compressor until its dew point reaches 20˚C to 40˚C and below.

Further, dry air passes through main filters to remove oil, dust, and other particles up to 0.01 µm in size.

After the main filters, air enters the air receiver, which is designed to smooth compressed air flow irregularities created by the compressor and also acts as a compressed air ‘accumulator’ in a pneumatic network.

Then the air passes through an antibacterial filter designed to clean the air from microorganisms: bacteria, bacterial contaminants, yeasts, fungi, and their products.

The technological process is fully automatic due to the control system and does not require intervention and constant operator control.

The control system continuously monitors pressure value via a pressure sensor and regulates pressure in the network by switching the compressor on and off.

The control system allows compressors to be cycled on a timer to equalize running time.

The controller has a timer delay function to avoid simultaneous compressor start-up.

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