Since this is an air-conditioning refrigerant inwards newer automobiles, the optimal running describe per unit of measurement area for R134A is betwixt 22 together with 57 pounds per foursquare inch. As a refrigerant, a liquid capable of vaporizing at depression temperature,that is used inwards automotive air conditioning, the the U.S.A. Environmental Protection Agency, specifies that R134A is non flammable at ambient temperatures together with as non corrosive to metals such as aluminum, copper together with stainless steel.
The Pressure Temperature Chart
Like whatever other refrigerant, the describe per unit of measurement area ofR134A rhymes alongside its temperature. You could decide the refrigerant describe per unit of measurement area at whatever temperature betwixt −22 together with 202 degrees Fahrenheit yesteryear reading the value from a describe per unit of measurement area temperature chart.
In a high-temperature refrigeration box, where temperatures ideally arrive at from 45 to threescore degrees Fahrenheit, the ringlet temperature is, typically, betwixt 10 together with xx degrees Fahrenheit colder than the box itself. This departure is precisely referred to as the temperature difference.
The Normal Running Pressure
For the normal running describe per unit of measurement area inwards an R134A system, the ringlet should percentage at 22 pounds per foursquare inch at the lowest temperature, 45−20 = 25 degrees Fahrenheit. Thus, at the highest temperature, 60−20 = xl degrees Fahrenheit, the ringlet should percentage at 57 psi. In other words, the normal running describe per unit of measurement area of R134A arrive at betwixt 22 together with 57 psi inwards that type of system.