Handline Nozzle

Description

The fire nozzle is an important part of the firefighting system. The selection of the fire nozzle type to be used by the department should depend upon the tactics and performance required. You should decide what you want your nozzle to do before making your decision.

Nozzles are designed to help put out fires by getting the right amount of water, in the right form, in the right place.

Nozzles have three main functions:

1. Control Flow
   The size of the orifice in the outlet of the nozzle controls the flow.
2. Provide Reach
   The nozzle creates a restriction at the end of the waterway, which changes water pressure to velocity. Velocity provides the reach, which is necessary to get the water to where it is needed.
3. Create Shape
   Different situations require different methods of applying water or foam. Some situations require the reach and penetration of a straight stream, while others require the heat adsorption capability or radiant heat protection of a wide angle fog spray.

Different Type of nozzles:

1. Solid Bore Nozzle

Its purpose is to produce a solid stream, which provides maximum reach and penetration.

2. Single (Fixed, or Variable Pressure/ Variable Flow) Gallonage Nozzle

The simplest form of the combination or fire nozzle type, provides flow at a predetermined rate that cannot be altered significantly while in use. However, when the nozzle pressure is varied the flow varies.

3. Adjustable Gallonage Nozzle

Today’s adjustable gallonage nozzles allow the nozzle operator to manually select a desired gallonage without shutting down

4. Automatic (Constant Pressure) Nozzle

An automatic nozzle is designed to maintain a relatively constant pressure over a wide range of flows. This is accomplished by a mechanism in the nozzle that automatically adjusts to an increase or decrease in flow to maintain pressure, and thus reach, fairly consistent.

5. Multi-Purpose Nozzle

A combination solid bore and fog nozzle, provides maximum reach and penetration, while still providing the benefits of a fog stream as the situation dictates.

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