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) |
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 ...
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
Pressure and Boiling Point