What Is The Pressure Indicator Gauge Used In A Fire Extinguisher?
Dry-chemical and water fire extinguishers have pressure gauges that function to expel the contents. The gauge works on pressure and when the indicator shows that it is correct is when it works.
However, in some instances, the indicator can show recharge, meaning the pressure is low. Carbon dioxide extinguishers don’t have pressure indicators as CO2 is at high pressure of 820PSI. Furthermore, the CO2 is liquefied, and at this point, the pressure is constant.
How It Works
The condition of an extinguisher can be determined by the gauge. It shows the pressure limit before the discharge of fire retardants. The needle falls as per the pressure available. If it falls to the red zone, the extinguisher has to be serviced and recharged.
Moreover, you should check the extinguisher regardless of the remaining agent. Totnes fire protection & signs Ltd team are there to ensure your extinguishers get full service.
The red zone in some gauges indicates the pressure of dry powder to be too low for use. The needle on the green zone shows the pressure to be in normal conditions. The yellow zone is the overcharge indication and pressure is so high. This can lead to hose destruction or an explosion. The pressure indicator gauge shows the readiness of an extinguisher. Always check first.
Before using the extinguisher, check if it is properly charged. Some pressure gauges recommend no use of oil. The pressure is to ensure the dry chemical is well discharged in case of a fire. Besides, the pressure gauge shows the original compressed air’s pressure and an alert on its condition.
If well charged, the needle on the pressure gauge will be on the green section. Consider a good charge range to be between 185–205 PSI. Nonetheless, Totnes fire protection & signs ltd deliver fully charged portable extinguishers for operations.
How To Recognise Depressurisation
Some fire extinguishers have gauges that give pressure indication by the ‘recharge and overcharge ‘signs. Also, the portable extinguishers are metal cylinders and can be worn out over time. This can cause leaking of the gas and it depressurised.
The gauge ascertains this for you, as using such an extinguisher can be dangerous when the need arises. It is important to do annual service on the pressure gauge and ensure it is in the proper position with zero damage.
What To Do When An Extinguisher Depressurised
In cases where the pressure gauge needle indicates overcharge or recharge, inform the Totnes fire protection & signs ltd. They are professionals to inspect your extinguisher and ensure it is safe for recharge to avoid accidents.
Furthermore, they can do the refilling at an affordable cost or do cylinder replacements for your corporation or home. You can recycle the one not in use. The pressure gauge gives you information if the extinguisher is in a safe zone for use.
Check the charge regularly by pressing the green button. The gauge displays the values. The needle on the full range indicates it is in good condition. Although, you should inquire with experts for hydrostatic tests.
Wrap Up
Pressure indicator gauges give the value of the nitrogen gas that is part of the extinguisher agents. Ensure to go for quality fire extinguisher cylinders that have functioning gauges.
