VW Touran manuals

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)
     
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
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:

Visual Inspection
  WARNING Risk of injury. Follow all Warnings and Safety Precautions. Refer to → Chapter "Warnings and Safety Precautions". Prior to performing any measurements or ...

Information stickers and plates
First read and observe the introductory information and safety warnings Safety certificates, stickers and plates containing important information on operating the vehicle are factory-fitted in the engine compartment and on certain parts such as the tank flap, front passenger sun visor, the ...

Personal convenience settings
First read and observe the introductory information and safety warnings If two people use a vehicle, Volkswagen recommends that each person always uses their own vehicle key. When the ignition is switched off and when the vehicle is locked, the personal convenience settings are automatically ...

© 2016-2018 Copyright www.vwtouran.net