What is the discharge time range for the EFRS Drychem extinguisher?

• A. 2-4s
• B. 30-40s
• C. 10-25s
• D. 5-15s

Answer: (C)

Discharge time is how long the extinguisher will emit its extinguishing agent when you operate it. For the EFRS Drychem extinguisher, the standard handheld unit is designed to discharge for about 10 to 25 seconds. This window reflects the amount of dry chemical in the canister and the fixed flow rate through the nozzle, giving enough time to apply the agent effectively to a small to medium fire.

Ranges like 2–4 seconds are too short to deliver a meaningful quantity of powder, and 30–40 seconds would require a much larger or slower-discharging unit than typical handheld Drychem extinguishers. A 5–15 second range is closer in, but the commonly specified spec for this equipment sits at 10–25 seconds, making it the best choice. Always check the extinguisher label for the exact discharge time of your specific unit.