If it's like perfume, and it only requires substances to come out, you might as well adopt "two sets of structural air pressure combination" (named by yourself for the time being). That is, put a balloon-like sphere in the steel cylinder to hold the liquid you want to shoot, and the outlet is connected to a tube. Of course, there must be a simple valve, and the outside of the ball is pressurized and sealed in advance. 〉
Ear-absorbing balls for chemical experiments have been used all the time. The principle is the same, but air can be exhausted by external pressure.
Thank you for your encouragement!
I have to emphasize double sets. Do you have an email address? I am very busy these two days. I'll draw a picture and send it to you later! !
I have also considered the mechanical type, but the seal between the high-pressure stage and the low-pressure stage is not easy to solve, and it can also be discussed.
I study chemistry. As for your corrosiveness, I might as well tell you what it is, such as acidity, alkalinity, strong polarity, organic or inorganic. Only by understanding all aspects can the direction of thinking be determined!
I have sent you an email, CAD 04 version.