What is the testing pressure for cartridge operated extinguishers at the factory?

The testing pressure for cartridge-operated extinguishers at the factory is identified as the service pressure. This refers to the pressure level that the extinguisher must be able to withstand during testing to ensure its integrity and safety in operational conditions. Service pressure is defined specifically for each extinguisher model and is critical in determining how the extinguisher will perform during its intended use.

It is essential for this test to simulate the pressures that the extinguishing agent and propellant will exert when the extinguisher is activated, ensuring that the components remain functional and leak-proof under typical operating conditions. Understanding this concept is crucial for anyone involved in the maintenance, inspection, or operation of fire extinguishers as it relates to ensuring equipment reliability and safety.