Can the self-acting regulating valve for nitrogen sealing in storage tanks adjust the pressure from 0.4 MPa to 2 KPa in one step?
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Can the self-acting regulating valve for nitrogen sealing in storage tanks adjust the pressure from 0.4 MPa to 2 KPa in one step?
Yes, it’s currently set at 1 Kpa in most cases; the breathing valve of the storage tank is set at 980 Pa
There’s no problem with this; it’s a normal situation.
The pressure of low-pressure nitrogen in our factory is 0.7 MPa, and nitrogen of this pressure level is used for nitrogen sealing in all atmospheric-pressure storage tanks. No problem, as long as the diameter of the nitrogen piping for punching and the selection of the control valve are appropriate.
Self-acting control valve with actuator, tank nitrogen seal valve http://www.sinocontrols.com.cn/news.php?bid=79
It is achievable, but if a self-acting control valve is used, with a pressure range from 400 KPa to 2 KPa, stability needs to be taken into consideration; after all, the differential pressure required for regulation is quite large. Give it a try – if tuning proves difficult, replace it with another valve when the process conditions change
"Can it be adjusted in steps from 0.4 MPa to 2 KPa? " Sure, it can do that – but only barely. A cheap valve diaphragm with a tolerance of 2 kPa/0.4 MPa, which is equivalent to 1/200, how on earth could it have such high sensitivity and repeatability? .
After multiple stages, one valve won’t be enough