| Vapour pressure table for refrigerant R134a |
| The vapour pressure table for every refrigerant is published in the literature for refrigeration system engineers. This table makes it possible to determine the vapour pressure acting on the column of liquid in a vessel if the temperature of the vessel is known. |
| As there is a characteristic vapour pressure table for every refrigerant, it is possible to identify the type of refrigerant by measuring pressure and temperature. |
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| „0 bar absolute pressure“ corresponds to an absolute vacuum. The normal ambient pressure (atmospheric pressure) corresponds to „1 bar absolute pressure“. On the scales of most pressure gauges, „0 bar“ corresponds to an absolute pressure of 1 bar (this is also indicated by the value „-1“ appearing below „0“). |
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| Pressure can be measured in various units: 1 MPa (megapascal) is equivalent to 10 bar gauge pressure, or 145 psi; 1 bar absolute pressure is the same as 0 bar gauge pressure, which is roughly equivalent to atmospheric pressure. |
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