Please ask forum friends to recommend a gas check valve
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I would appreciate it if forum members could recommend a gas check valve for this application. The situation is as follows: the liquid inside the tank needs to be protected by nitrogen; there is one nitrogen inlet pipe and one nitrogen outlet pipe, and a gas check valve needs to be installed on the nitrogen outlet pipe – this serves to prevent oxygen from entering while maintaining a slight positive pressure inside the tank. Friends who have used similar applications, please recommend the manufacturer and model. Thank you!
Can’t it be solved with a self-acting valve? Set the pressure inside the tank that you want to maintain; it is usually a slight positive pressure, which is easy to achieve.
How effective is the self-acting valve? Is there a model with low pressure?
Yes, for example, it’s possible to achieve a pressure level of around 10 kPa; you can consult FISHER regarding this
Choose a breathing valve. Just use the menu setting for protection; set it to 4 kPa, which is the typical design pressure for storage tanks.