Question

When should you replace the co2 cylinder in an inflatable pfd?

Answer 1

Replace the CO2 cylinder in an inflatable PFD if it has been used, shows damage, or is beyond the manufacturer's replacement date. Liquid CO2 is present below 31°C, while above this temperature, CO2 cannot be liquefied.

Step-by-step explanation:

You should replace the CO2 cylinder in an inflatable PFD when it has been used after an inflation, if it shows any signs of damage, or when the manufacturer's suggested replacement date has been reached. Understanding the critical temperatures is also essential for the proper maintenance of the CO2 cylinders. On a cool day, if the temperature is below the critical temperature of CO2 (304 K or 31 °C), liquid CO2 will be present in the cylinder. However, on a hot day with temperatures above this threshold, CO2 cannot be liquefied regardless of the pressure applied, and no liquid CO2 will be present in the cylinder, which could impact the performance of the PFD.

Answer 2

The Co2 cylinder must be replaced anytime it is punctured. A CO2 cylinder is punctured if it automatic inflates when the user enter water. The PDF should be examined regularly to ensure that there is no leak in the vest. The typical recommended expiry date for PDF CO2 cylinder is one to two years, this recommendation should be followed even if the cylinder is not punctured.