The sampling points for the two differential pressure gauges are the same; why then are the displayed values so different? Why was this design chosen?
Thread Content
The sampling points for the two differential pressure gauges are the same; why then are the displayed values so different? Why was this design chosen? Oxygen is mixed with a certain medium, and two pressure difference gauges are used in the design – both are intended to measure the pressure difference between oxygen and the resulting mixture. However, the readings shown by these gauges differ significantly. What could be the reason for this? Why is it designed this way?
It might be measuring the partial pressures of the two gases. So at the same sampling point, but with different pressures
There must be a problem with the pressure gauges; at least one of them is inaccurate. Two gauges are used because the pressure difference is very important
Maybe you misread it; the units of the two pressure gauges are different. :lol
There are pressure-reducing devices between the measuring points of the two gauges, right? Wouldn’t it be a waste not to use both gauges?……
Is there a throttling device between the two pressure gauges?
Are both watches on-site? Is one of them sent to the DCS remotely, while the other is for on-site personnel to view?
Both gauges are displayed on the DCS, and one of them is equipped with a interlock; the value of this interlock is set quite low, aimed at preventing the mixed gas from mixing back with oxygen and causing an explosion
There may be a pressure reducing valve between the two pressure gauges; one gauge measures the pressure before the valve, while the other measures the pressure after the valve.
There must be a throttle orifice plate; otherwise, how could there be a difference? Is it installed on both sides of the flange? Or maybe there is a pressure relief valve, but with a pressure relief valve you should be able to tell what it is, so it must be a throttle orifice plate.
Those who participated in the discussion above are truly experts; can they discuss design issues without any diagrams? Why doesn’t the original poster post the drawings?