VW Polo manuals

Volkswagen Polo Service & Repair Manual: Refrigerant R134a Vapor Pressure Table

The vapor pressure table for every refrigerant is published in literature for refrigeration system engineers. This table makes it possible to determine the vapor pressure acting on the column of liquid in a vessel if the temperature of the vessel is known.
Because each refrigerant has its own characteristic vapor pressure table, refrigerant can be identified by measuring the pressure and temperature.
  Note
At absolute pressure, 0 bar/psi corresponds to absolute vacuum. Normal ambient pressure (positive pressure) corresponds to 1 bar (14.5 psi) absolute pressure. 0 pressure corresponds to an absolute pressure of 1 bar (14.5 psi) on most pressure gauges (indicated by -1 bar (-14.5 psi) below 0 bar/psi).
   
Temperature in °C (°F) Pressure in bar (psi) of R134a
-45 (-49) -0.61 (-8.84)
-40 (-40) -0.49 (-7.10)
-35 (-31) -0.34 (-4.93)
-30 (-22) -0.16 (-2.32)
-25 (-13) 0.06 (0.87)
-20 (-4) 0.32 (4.64)
-15 (5) 0.63 (9.13)
-10 (14) 1.00 (14.5)
-5 (23) 1.43 (20.74)
0 (32) 1.92 (27.84)
5 (41) 2.49 (36.11)
10 (50) 3.13 (45.39)
15 (59) 3.90 (56.56)
20 (68) 4.70 (68.16)
25 (77) 5.63 (81.65)
30 (86) 6.70 (97.17)
35 (95) 7.83 (113.56)
40 (104) 9.10 (131.98)
45 (113) 10.54 (152.86)
50 (122) 12.11 (175.64)
55 (131) 13.83 (200.58)
60 (140) 15.72 (227.99)
65 (149) 17.79 (258.02)
70 (158) 20.05 (290.80)
75 (167) 22.52 (326.62)
80 (176) 25.21 (365.64)
85 (185) 28.14 (408.13)
90 (194) 31.34 (454.54)
Pressure and Boiling Point
The boiling point given in tables for a liquid is always referenced to an atmospheric pressure of 1 bar (14.5 psi). If the pressure acting on a fluid changes, its boi ...

Refrigerant R134a
...

Other materials:

Run-Flat System PAX, Examining Support Ring
As with the tire, the supporting ring is generally not replaced after driving with flat tire.     Replace the support ring if the following damages have occurred: Blowouts or mis ...

Water Content
Only very small amounts of water are soluble in liquid refrigerant. On the other hand, refrigerant vapor and water vapor mix in any ratio. Only a small drop of water may get into the refrigerant circuit. The dryer, dryer bag or dryer car ...

Flat Spots, Correcting
Flat spots cannot be removed from tires with workshop equipment. Such flat spots can be "driven out" only by driving the car until the tires are warm. We do not recommend the following method during ...

© 2016-2021 Copyright www.vwpolo.net