On the automatic control of tank pressure
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Regarding the automatic control of the normal pressure in storage tanks with a capacity of 2–5 cubic meters, it is uncertain whether pneumatic control valves can be used to achieve automatic pressure control, given the small size of these tanks (the pressure control range is 0–3 kilograms of pressure)
Of course it’s possible. It just requires higher standards for the control system, but this is relatively easy to achieve
I know it’s theoretically feasible as long as the control valves are chosen and the piping is appropriate, but cost-effectiveness must definitely be taken into consideration. If the price of an automated control system is much higher than that of the equipment itself, it certainly requires careful thought. That’s why I’m posting here to ask if anyone has used such automated control systems before (it’s definitely easier to implement this approach for larger storage tanks; the problem is that my tanks are small, and smaller control valves are relatively expensive):lol
It’s a very simple control scheme… A self-acting control valve is used to set the control pressure; it works in the same way as in nitrogen sealing systems. Just one nitrogen sealing valve is sufficient – it doesn’t cost much at all.
The pressure of the storage tank is controlled using a self-acting control valve, which transforms pulsed nitrogen into a steady stream of low-pressure nitrogen, thereby ensuring the proper pressure within the tank!
What was said upstairs makes sense; we use self-acting control valves here to regulate the pressure in small storage tanks.
It seems that the set pressure of a self-acting control valve is determined at the time of manufacture, but my tank requires variable pressure rather than constant pressure. Also, I would like to know which brands offer better quality self-acting control valves. Thank you
It is recommended to use self-acting control valves; one thing to keep in mind is that the setting pressure for such valves is determined based on experience. Using FISHER’s
Sure, just have the instrument technician adjust the calculus settings