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:
Refrigerant Circuit Connections with Valve for Switches
Note
For switching pressures, removing and installing switches
and switch arrangement and version, see vehicle-specific
refrigerant circuit.
Refer to
→ Rep. Gr.87.
...
Replacing Reservoir, No Contaminants, No Loss of Refrigerant
Discharge the refrigerant circuit.
–
Replace the restrictor depending on the vehicle.
–
Remove receiver or accumulator.
–
Remove dirt from receiver or res ...
Removing and fitting head restraints
First read and observe the introductory information
and safety warnings
Every seat is fitted with a head restraint. The centre rear head restraint is
designed solely for use with the centre rear seat. This head restraint should therefore
not be installed in any of the other positions.
Remov ...
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Pressure and Boiling Point