Volkswagen Touran Service 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 ...
Refrigerant R134a Physical Data
Vehicle air conditioning systems make use of the
vaporization and condensation process. In this case, one works
with a substance whic ...
Other materials:
Volkswagen Touran Service Manual. Heel and Toe Wear
Heel-and-toe wear is step-like wear of individual tread
blocks, due to which an increased rolling noise can develop. The
heel-and-toe wear is caused by the uneven distortion of the
tread blocks in the contact patch. Heel-and-toe wear appears in
more extr ...
Volkswagen Touran Service Manual. Evaporator
Caution
Non-approved tools or materials such as leak sealing
additives can cause damage or malfunctions in the
system.
Only use tools and materials approved by the
manufactu ...
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