Volkswagen Touran Service Manual: Refrigerant R134a Vapor Pressure Table

Volkswagen Touran Service Manual / Heating, Ventilation and Air Conditioning / A/C System, General Information / 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:

Volkswagen Touran Owners Manual. Securing child seats using lower anchoring points (ISOFIX, LATCH)
Fig. 72 Cushion in the backrest of the outer seats in the second row of seats Fig. 73 ISOFIX retaining rings for ISOFIX child seats in the frames of the outer seats in the second row of seats First read and observe the introductory information and safety warnings Two retaining rings ...

Volkswagen Touran Owners Manual. Engine oil specification
First read and observe the introductory information and safety warnings The engine oil used must correspond exactly to specifications. The correct engine oil is important for the function and service life of the engine. A special high quality multigrade oil has been filled at the factory an ...