The compressor and the pressure reducing valve are the two most important objects in the gas domain, which actively influence the pressure. For this reason, both are subnet controllers and take a central position for the formation of the subnetwork.
Both elements have two connection points.
Case Description |
Graphic |
Explanation |
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Pressure reducing valve to control the pressure on the output side |
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Gas which arrives e.g. with 5 bar on the dark orange line is reduced by the Pressure reducing valve to a lower pressure in the yellow line. Terminal/Connection point: High_In to Low_Out |
Compressor |
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Gas which arrives e.g. with 1 bar on the yellow line will be lifted by Compressor to a higher pressure level (dark orange line). Terminal/Connection point: Low_Out to High_In |
Subnetwork controller (minimal collection)
A pressure reducing valve has a minimum of the number of connected pressures minus one pressure reducing valve. This means with 4 different pressures there must be 3 pressure reducing valves.
Situation |
Schematic |
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In a PRM station are different pressures that arrive or leave. |
From the logical point of view, 5 bar is then reduced to 1 bar. This is followed by a reduction to 0.1 bar and then again to 0.01 bar. It is also conceivable that 1 bar is reduced to 0.01 bar. However, the number of pressure reducing valves required remains the same. |
Number of pressure reducing valves
Minimal station with plant construction
Situation |
Description |
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The figure shows a minimum station with a pressure reducing valve. When entering the plant, the two ConnectionJunction are used as a connection between the line construction and the plant construction. These ensure that the two systems can be correctly connected to each other. This connection is made with StationEquipmentLine. Alternatively, an association between two points (ConnectionJunction and RegulationDevice) can be used. |
