January 20, 2021 at 9:45 am #6907Phun Lee MingParticipant
“Why we still allow Oil Lubricated Screw Compressor to be used as source for Breathing Air and Medical Air in our Hospital ??!!”
Do you know many countries, Malaysia is one of those, are using HTM 02-01 standard for hospital’s medical air application ?
Medical air applications in hospital are referring to Breathing Air for Patient, Testing & Drying of Medical devices, Operation of Surgical Tool, etc.
In HTM 02-01 standard, the source of this medical air is allow to be Oil Lubricated Screw Compressor !
As we all know Oil Lubricated Screw Compressor uses lubricant inside the compression chamber, therefore the generated air will consist up to 3ppm of oil content when it is new. It has been numerous cases, frequent happening, in which “Oil Carry Over” happen. This means excessive oil vapor get into the compressed air and supplied into the pipeline and point of use.
In many former commonwealth countries, hospital continue to adopt HTM02-01 for medical air generation. But, there is a better standard called NFPA99, which only allow Non Oil Lubricated compressors as source of supply, like oil free screw , oil free scroll, etc. It is widely adopted in many European countries, US and some Asia countries.
In page 71 of HTM 02-01, a quiet statement read ‘oil-free compressors may be beneficial in reducing filter requirements’. What does this mean ? It means you should not take the risk with Oil Lubricated Screw Compressor for Medical Air purpose ! Filtration system using Hydrocarbon filter is not a bulletproof solution, subjected to potential mechanical failure or human oversight in changing the filter cartridge.
In short, it is time to seriously raise the question, why we allow oil vapor inside the Hospital’s breathing air and medical air ?0
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