Receive on one " technology of pneumatics machine type selecting 2: Machine of what type pneumatics suits me? " , defined size of pneumatics machine norms and kind when you hind, what need a consideration next is machine of pneumatics of choice fuel injection or machine of the pneumatics that do not have oil, depend on without oil and the choice that have oil the end that use gas uses setting.
Need to evaluate the demand that use gas above all
If use those who contain small oil to compress air very serious to the pollution of the product, need to choose not to have oily pneumatics machine. At present the oily to be like pollution such as major manufacturing industry, factory can choose without the requirement oil-lubricated pneumatics machine.
If use gas end to did not need clearly to use,do not have oil to compress air, from economic angle the consideration should choose oil-lubricated pneumatics machine is like machine of pneumatics of fuel injection screw. The cost photograph of machine of the pneumatics that do not have oil compares price of machine of fuel injection pneumatics a lot of taller. The oil that trace contains in the gas that although fuel injection is empty,press yields but can undertake filtering through filter. Agglomerate filter can purify the contaminant in compressing air commonly on the market at present to 0.01 micron, if want the result,still can choose activated carbon filter to undertake filtering again very much more. The compression after filtering clean grade can achieve air Ⅰ class.
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Machine of the pneumatics that do not have oil basically applies at very sensitive to oil product, for instance food, medicine, semiconductor. If compress,oily branch is contained to bring about a product in air unqualified or fine is tasted rate is low. 0 class do not have oil (Class 0) and " the technology does not have oil " the requirement do not have oil that issues in specific standard on behalf of pneumatics machine. "Without oil " the clean degree after expressing to compress air to be filtered without oil with 0 class, and any lubricating oil are not used in using the lead plane that describes pneumatics occasion namely without oil, these two have substaintial distinction.
There is an ISO level at present on international to compressing air. Can according to airy clean degree (the grain amount of every stere thinks grain size will decide) cent is 0~5 gross 6 grade. ISO is clean the class that spend Ⅰ expresses " the technology does not have oil " , its stipulated the oil content that reduces air to fall in 1bar and 20 ℃ condition is 0.01 Mg/m3. This kind of standard can pass filter to wait filter will come true, namely " the technology does not have oil " .
ISO is clean spend 0 class to express not to have oil really (Class 0) , 0 class can assure to compress air without oil on behalf of clean grade. Manufacturer of aircraft of very much undesirable pneumatics will be oil-lubricated pneumatics machine yields compress air to be achieved through filter technology " oil is not had on the technology " this is a mistake. Because this is choosing to not have,oil should choose 0 class not to have oily pneumatics machine when pneumatics machine, is not " oil is not had on the technology " . 0 class do not have oily pneumatics machine to be able to assure to carry what won't be yielded to compress air to pollute with gas. If to this two kinds are not,understand the pneumatics aircraft engineer that can look for major to undertake advisory very much.