Which brand should I buy for the compressor air pump in stomatology? Urgent!

I am engaged in the maintenance of oral equipment. First of all, I don't recommend you to use medical oil-free pump, because the noise of medical oil-free pump is acceptable at first, and it will get bigger and bigger after one year, and there will often be some minor problems, especially in Suzhou Regal. I have two customers who use Regal here. One of them burned the pump head twice, and the other often had unknown noise, so the reason could not be found. There is nothing wrong with changing the pump head several times during the warranty period. Other brands are not very clear. If the environmental conditions permit, I suggest you use an industrial pump, which is cheap and stable in performance, plus a refueling water separator and filter. If the conditions do not allow, I recommend you to use Foshan tooth tail. The price is Yituo 1500 and Yituo 1800, using Guang Shun pump head. Accessories are basically universal, and maintenance is very convenient!