FAQ / FAQ
- What is the best vacuum pump for medical use?
- What is the best compressor for medical air?
- How dry does medical air have to be?
- Does medical air require purification?
- Can refrigerant dryers be used for medical air?
- Which standards regulate medical air systems?
- What is vacuum?
- How to measure flow rate of vacuum pumps?
Find out more about vacuum pumps.
Oil-free air, as generated by our oil-free pistons, scroll and tooth technology, is preferred in most medical applications. Oil-lubricated compressors and liquid ring machines can also be used successfully, where permitted by local standard.
Some standards have set the required dew point level to -40°C/F. That dew point however is based on the dew point achieved by a standard desiccant dryer, rather than the therapeutic optimal level for the patient.
Check the local standards in your country and contact us for the optimal solution.
Clean and dry air is not only critical to protect your patients' health, it also ensures the working of your system.
United Kingdom: HTM 02-01, previously HTM2022, updated to include requirements of ISO 7396-1.
The HTM standard sets out minimum safety and operating criteria. Atlas Copco's medical units meet and surpass these requirements, while at the same time excelling in quality, reliability and a consistent performance.
United States: NFPA 99
Some other standards:
- AS 2896 - Australia
- SANS 1408 - South Africa
- JIS T7101 - Japan
- SIS HB 370 - Sweden
- CAN/CSA - Z305.1-92 - Canada
Summary for all standards:
- At least 3 sources (HTM 02-01/ISO 7396-1), at least 2 sources (NFPA/HTM 2022)
- Bacterial filters (HTM/ISO)
- Isolating valves
- Duplex receivers (HTM/ISO)
- Specific alarms (all standards)
Read more on medical regulations and how Atlas Copco handles them.
There are two ways of measuring a vacuum pressure:
bar(e) the effective or gauge pressure denotes how much the pressure is below local atmospheric pressure.
bar(a) the absolute pressure denotes how much the pressure is above absolute zero vacuum.
- Displacement or Volumetric flowrate (Vsuction):
– Constant motor speed + fixed pump chamber dimension = constant flowrate independent of vacuum level (in our relevant range)
– Expression of flowrate inside the pipework at the governing vacuum pressure
- Free Air Aspiration (FAA):
– Number of molecules in that constant volume decrease with deeper vacuum = decreasing massflow with deeper vacuum
– Volume flowrate stated at a fixed -600mbar(e) (-450mmHg) and referred to free air
- Flow expressed as FAA < flow expressed as displacement