idesign73
Mechanical
- Sep 25, 2002
- 28
My company makes liquid level gauges (my area being boiler trim). I am working on calcs for a gauge with a valve at each end. The gauge is pressurized to hydrostatic test pressure (at 70°F) and the valves are closed. Over the course of an hour the gauge loses about 150 psig of pressure (starting pressure = 4500 psig). After performing a hydrogen leak test, it is assured that the gauge is not leaking. My thought is that the gauge glass is lifting a bit, therefore reducing the pressure. I need to quantify how much the glass would be lifting for a given pressure drop, however, I can not find any equation that would correlate pressure and volume with a liquid, specifically water. Any thoughts? Any other thoughts as to the drop in pressure?
Thanks in advance for any help!
Thanks in advance for any help!