Volkswagen Polo Service & Repair Manual: Refrigerant R134a Physical Data

Volkswagen Polo Service & Repair Manual / Refrrigerant R134a Servicing / A/C System, General Information / 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 which boils easily, designated as refrigerant.

The refrigerant employed is tetrafluoroethane R134a, which boils at -26.5 °C (-15.7 °F) at a vapor pressure of 1 bar (14.5 psi).

Chemical formula	CH2F–CF3 or CF3–CH2F
Chemical designation	Tetrafluoroethane
Boiling point at 1 bar (14.5 psi)	-26.5 °C (-15.7 °F)
Solidification point	-101.6 °C (-150.88 °F)
Critical temperature	100.6 °C (213 °F)
Critical pressure	40.56 bar absolute (588 psi) equals 39.5 bar pressure (573 psi)

Critical Point

Vehicle air conditioning systems make use of the vaporization and condensation process. In this case, one works with a substance which boils easily, designated as ref ...

Other materials:

Wire Break with Single Repair Point
Repair point with single crimp connection – Free up wire intended for repair (approximately 20 cm to both sides of repair point). – If required, remove wiring harness wrapping using a folding ...

Tires, Damage from Low Tire Pressure
The most common causes of failure are small external damage, a defective valve or a leaky rim due to corrosion or damage. Separation of Carcass and Rubber Strong heating due to driving w ...

Automatic gearbox: selecting a gear
Fig. 111 Left-hand drive vehicles: selector lever for automatic gearbox with lock button (arrow) Fig. 112 Right-hand drive vehicles: selector lever for automatic gearbox with lock button (arrow) First read and observe the introductory information and safety warnings The selector lever is ...