Differential Pressure Gauges
The pressure difference is thought to be the pressure difference between two points, which may be the sides of a chemical reaction or even two large storage tanks for gas and other fluids.
In any case, the difference between the two is referred to as the differential pressure or the difference of the pressure breaker.
Differential pressure gauge or pressure differential (Differential Pressure Gauges)
It is a tool to measure this pressure difference between two points. Of course, we do not mean a simple reaction here, and most of these devices are used for large industrial projects.
For example, suppose that in a refinery system, several tanks are connected by piping and must have a certain pressure difference.
The gauge is the pressure difference between the two systems and reports the pressure difference between them.
In general, a differential barometer is a device with two inputs that are connected to two tanks or two piping systems.
These two sides apply two different pressures to the barometer measurement system, through which the device reports the pressure difference between them.
If the pressure difference between the two points is zero and they are in fact equilibrium, the hand will not move in any direction.
Principles of pressure difference gauge design (DP gauge)
It can be argued that the design principles of the pressure difference gauge are based on the Bourdon barometer and only differ in how the pressure is detected.
The total number reported in these sphygmomanometers is the pressure difference between the two points.
For example, if the pressure of one tank is 120 Pascals and the pressure of the second tank is 80 Pascals, the differential pressure gauge will tell us the difference between the two pressures, which is equivalent to 40 Pascals.
Bourdon barometer used an alloy tube to measure pressure and its movement to move the hand.
However, there is no pressure difference in this alloy tube, and the pressure difference may be cylindrical, digital, or other pressure measurement methods.
The only thing that matters here is that the final number reported indicates the pressure difference between the two points.
Applications of pressure difference gauges
The pressure gauge is a device with two inputs that compares the pressure differences between the two sides of these inputs and reports the final result on the pressure scale.
In general, the applications of differential pressure gauges include the following:
- Measurement of pressure difference for gaseous and liquid fluids in the tank or piping system
- Monitoring and controlling the operation of pumps in pressure systems for fluid transfer
- Monitoring and monitoring the filtration process in refineries as well as in refineries
- Level measurement in closed tanks that cannot be visually monitored
- Indirect use of pressure difference number to obtain level difference in buried or closed tanks.
Almost all of these items are found in various forms in refineries and in large industrial projects. For this reason, if we claim that the pressure difference gauge is widely used, our claim is not wrong.
Why should we use a pressure difference gauge?
There are many reasons to use these sphygmomanometers, but citing some of them in general will help us to have a better understanding of these devices.
Chemical reactions are affected by pressure
For systems where chemical reactions are performed indoors, pressure control on both sides of the reaction is of particular importance and it is necessary to always have a higher pressure on the reactants. So the pressure difference gauge helps us maintain that difference and contribute to the feasibility of the reaction.
Maintain safety in the workplace
Pressure and de-standardization is one of the most dangerous events in the industry and in the field of refineries. These pressure differences can lead to reservoir explosions and major problems, often resulting in bizarre loss of life and property. For this reason, differential pressure gauges are used to examine different parts of the piping system.
Monitoring the operation of pumps and the filtration process
Both the pump and the filter play a role in the pressure difference, and even how they work properly depends on this pressure difference. We must accept that filtration without pressure difference or pumping without pressure difference is not possible. This is why the pressure difference gauge shows up and gives us the opportunity to control the performance of the pumps and the filtration system.
There are several drawings and applications for using pressure difference gauges that directly affect how a particular process is performed. Therefore, the use of differential pressure gauges is abundant in various industries, especially in the oil and petrochemical industry, and engineers attach special importance to this tool.
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