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:

Battery, Charging with Battery Charger -VAS5903
Special tools and workshop equipment required Battery Charger -VAS5903- WARNING Risk of injury. Follow all Warnings and Safety Precautions. Refer to → ...

Introduction
This chapter contains information on the following subjects: → Indicator lamp → Using the cruise control system The cruise control system (CCS) helps to maintain an individual set speed at forward speeds of approx. 20 km/h (12 mph) and higher. The CCS only slows the veh ...

EU Tire Label, Short Overview
Starting on 11/1/2012, tire manufacturers must comply with the new EU Regulation (EG) 1222/2009 (Tire Labeling Regulation). The Tire Labeling Regulation requires that information pertaining to rolling resistance (fuel efficiency), wet grip and external rolling noise b ...