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Special foam spray nozzle for tunnels

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Foam Extinguishing System

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Special foam spray nozzle for tunnels

The special foam spray nozzle for tunnels is a non-aspiration type, a combined nozzle composed of two or more independent nozzles. According to the size of the protected area, the foam nozzles are divided into three lanes, two lanes and single lane nozzles.

Tunnel special foam spray nozzle parameter table

name	parameters	name	parameters
System design pressure	1.6MPa	Nozzle installation position	Upper part of tunnel side wall
Fixed work stress	0.35MPa	Nozzle installation distance	5m
Working pressure range	0.35～1.2MPa	PT6.6 type K=210 single nozzle protection area	Suitable for three-lane tunnels. When the installation height is 4.2~ 5m , the protection area is: 12.5×5 m2
Entrance diameter	DN40	PT4.4 type K=140 single nozzle protection area	Suitable for two-lane tunnels. When the installation height is 4.2~ 5m , the protection area is: 8×5 m2
Material	copper alloy	PT2.7 type K=86 single nozzle protection area	Suitable for single-lane tunnels. When the installation height is 4.2~5 m , the protection area is: 5×5 m2
Connection thread	Rc1 1 /2