dry powder fire extinguisher hose
KSh 500
dry powder fire extinguisher hose is a flexible tube that delivers the extinguishing agent from the cylinder to the fire. It is constructed from highly durable materials to withstand pressure and is fitted with a specialized nozzle to control the discharge.
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Description
dry powder fire extinguisher hose construction and materials
The hose is designed to be robust and chemical-resistant to maintain its integrity under pressure and in fire conditions.
- Materials: Common materials for the hose body include PVC, EPDM, and rubber, often with a high-tensile polyester fiber braiding for reinforcement. High-end variants, especially for trolley-mounted units, may be all-rubber for superior pressure resistance, flexibility, and durability.
- Flexibility: The hose must be flexible enough for easy maneuverability to allow the operator to direct the powder accurately, even in tight spaces.
- Chemical resistance: Hoses are resistant to the chemicals in dry powder agents to prevent degradation and ensure long-term performance.
- Interface: The hose uses threaded fittings, such as M14x1.5 or M16x1.5, to ensure a secure, sealed connection to the extinguisher’s valve.
Nozzle description and materials
The nozzle is the control point for the extinguishing agent and is designed to create a powerful, concentrated stream of powder.
- Design: Most dry powder nozzles are trigger-controlled and designed to eliminate the intrusion of moisture into the nozzle. For larger, trolley-mounted extinguishers, an ergonomically shaped aluminum nozzle with a pistol grip may be used for better handling.
- Control: Many nozzles feature a shutoff device, allowing the operator to start and stop the flow of powder as needed.
- Materials: Nozzles are constructed from durable, corrosion-resistant, and noncombustible materials like aluminum, brass, or stainless steel to withstand fire exposure without deforming. Inexpensive versions may use plastic.
dry powder fire extinguisher hose Standard specifications
Specifications vary based on the size and type of extinguisher, from small portable units to large mobile ones.
| Specification | Portable extinguishers (e.g., 6kg–12kg) | Trolley/mobile extinguishers (e.g., 25kg–75kg) |
|---|---|---|
| Typical hose length | ~400–525 mm | 3–5 meters or more |
| Hose diameter | Varies, typically 15–20mm | Larger, with nominal bores up to 19mm and 3/4″ fittings |
| Nozzle type | Trigger-controlled | Pistol grip with a slide valve |
| Test pressure | ~25–27 bar | >50 bar |
| Connections | M16x1.5, G1/4, etc. | Standard threaded interfaces like G3/4 or compatible with BS336 |
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