Non-Pressurized Suspended Dry Powder Fire Extinguishing System | Frequently Asked Questions

Q1: What types of premises are suitable for non‑pressurized suspended dry‑powder fire‑extinguishing systems?

A1: Suitable for distribution rooms, cable shafts, small warehouses, generator rooms, and similar applications; it can extinguish Class A, B, and C fires as well as initial electrical fires, but is not suitable for fires involving reactive metals.

Q2: What is a non‑pressurized type?

A2: The cylinder does not store high pressure under normal conditions; instead, it relies on the internal gas‑generating charge to generate pressure and propel the dry powder out. This design offers enhanced safety during transportation and storage.

Q3: What startup methods are available for the device?

A3: It features automatic activation via a heat‑sensitive glass bulb, can also be connected to a fire alarm system for electrical activation, and some models support manual emergency start-up.

Q4: Will the discharge of dry powder damage precision electronic equipment?

A4: Fire‑extinguishing dry powder leaves a powdery residue that can adhere to and contaminate electronic components, making it unsuitable for protecting precision data centers and server equipment.

Q5: How long is the extinguishing agent’s shelf life, and does the cylinder require a hydrostatic pressure test?

A5: Dry chemical fire extinguishers are typically inspected and replaced every 5 years; the cylinder is stored at atmospheric pressure, so it does not require periodic hydrostatic testing like pressurized gas cylinders, but its components should be replaced upon expiration.

Q6: If the gaps in the protected area are relatively large, will this affect the fire suppression effectiveness?

A6: Yes. Before discharge, close doors and windows and ventilation openings as much as possible to minimize powder leakage and ensure that the extinguishing concentration is achieved within the protected area.

Q7: During the discharge phase of the system, may personnel remain inside the protected area?

A7: No. Dry powder dust irritates the respiratory tract and obstructs visibility; personnel must evacuate in advance and may only re-enter after ventilation has been completed.

Q8: Can the device be disassembled and recharged with dry powder extinguishing agent on your own?

A8: No. Any replacement of fire‑extinguishing agents or maintenance of the system must be carried out by a qualified fire‑protection contractor; unauthorized operations may render the system inoperable.

Q9: Can a single non‑pressurized suspended dry‑powder system protect multiple rooms?

A9: No, it is a standalone unit without a piping network; each unit protects only a single protected space. For multiple rooms, multiple units must be installed.

Q10: What routine maintenance checks should be performed?

A10: Regularly inspect the secure attachment of the device, the integrity of the glass bulb, and the condition of the housing for any damage; have it tested annually by a qualified maintenance provider.