According to the manufacturers instructions.
We do not know what you mean by "PFD", please do not use abbreviations. But the answer would be when the instructions for the "PFD" say it needs to be replaced.
You should replace the CO2 cylinder of an inflatable PFD when it has been used to inflate the device, if the cylinder shows signs of corrosion or damage, or if the expiration date indicated on the cylinder has passed. Regularly inspect the cylinder and ensure it is properly installed and securely tightened. Additionally, it's advisable to check the PFD's manual for specific manufacturer recommendations on maintenance and replacement intervals.
replace it
You should replace the CO2 cylinder in an inflatable PFD (Personal Flotation Device) if it has been used to inflate the device, as it cannot be reused. Additionally, inspect the cylinder regularly for any signs of damage, corrosion, or leakage. If the cylinder is outdated or shows any signs of wear, it should also be replaced to ensure proper functionality and safety. Always refer to the manufacturer's guidelines for specific replacement intervals and recommendations.
You should replace the CO2 cylinder on your inflatable PFD (personal flotation device) after each use, especially if it has been activated. Additionally, regularly inspect the cylinder for signs of corrosion, damage, or a low pressure indicator, and replace it if any issues are found. It's also advisable to replace the cylinder according to the manufacturer’s guidelines, typically every 2-3 years, even if it hasn't been used. Always ensure you have a fully charged and functional CO2 cylinder before using the PFD.
Discard and replace it- do not attempt to fix it
An inflator personal flotation device (PFD) should be inspected regularly, ideally before each use, to ensure it is in proper working condition. It's essential to check the inflator mechanism and CO2 cartridge for any signs of wear or damage. Additionally, maintenance checks should be conducted annually, including testing the inflation system and replacing any expired components. Always refer to the manufacturer's guidelines for specific recommendations on maintenance and replacement.
You should replace the CO2 cylinder in an inflatable personal flotation device (PFD) after each use, especially if the device has been activated. Additionally, inspect the cylinder regularly for any signs of damage, corrosion, or if the pressure gauge indicates it is low. Always follow the manufacturer's guidelines for maintenance and replacement to ensure the device is ready for use when needed.
For the newer Inflatable PFDs, most manufactures will tell you when you should replace your cylinder, and most have an easily viewable inflator status. For instance - The Mustang Deluxe Automatic Inflatable PFD: Universal fit states: No inflator maintenance is require for 5 years unless the PFD has been inflated. You can easily view the inflator status and replacement date through the safety inspection window. Green indicates ready for use. However, each manufacturer can have different specification, so it's best to check with your manufacturer and for your specific vest type. For more information regarding the Inflatables, visit: The link below
Discard and replace it - do not attempt to fix it
If a personal flotation device (PFD) has a tear in the fabric, it should be taken out of service immediately to ensure safety. Inspect the damage to determine if it can be repaired; minor tears may be fixed with specialized PFD repair kits. If the tear is significant or affects the buoyancy, replace the PFD entirely. Always prioritize safety and compliance with local regulations regarding flotation devices.