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How does a fireman’s hose nozzle works?

The nozzle of a fireman’s hose, how do they get lots of pressure from the nozzle?

That all depends on the type of fire fighting hose nozzle you have.

The real underlying factor for pressure at the nozzle is the pressure being supplied by the hose.
Hence the fire department’s use of PUMPER TRUCKS to pump up the pressure.

The Plain Pipe type of nozzle is merely a tapered restriction at the end of the hose
that maintains the pressure at the tip by restricting the flow.

The more professional type of fire fighting FOG nozzles are much more complicated
internally. (Some are even designed to maintain a constant gallonage flow through the nozzles.)
These nozzles are designed to break the stream up in one fashion or another
in order to create small droplets and thereby increase surface area of the water
thereby helping to cool the fire.

This entry was posted on Friday, January 8th, 2010 at 3:31 am and is filed under fireman. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

3 Responses to “How does a fireman’s hose nozzle works?”

  1. By forcing the water through a smaller opening at the end of a pressurized hose.
    References :

  2. Well, since there is a LOT of water flowing through the hose and trying to exit at one spot, so it’s going to build up water pressure. The nozzle also contains a valve that controls the flow of the water by moving a lever forwards or backwards. It’s almost like a garden hose.
    References :

  3. That all depends on the type of fire fighting hose nozzle you have.

    The real underlying factor for pressure at the nozzle is the pressure being supplied by the hose.
    Hence the fire department’s use of PUMPER TRUCKS to pump up the pressure.

    The Plain Pipe type of nozzle is merely a tapered restriction at the end of the hose
    that maintains the pressure at the tip by restricting the flow.

    The more professional type of fire fighting FOG nozzles are much more complicated
    internally. (Some are even designed to maintain a constant gallonage flow through the nozzles.)
    These nozzles are designed to break the stream up in one fashion or another
    in order to create small droplets and thereby increase surface area of the water
    thereby helping to cool the fire.
    References :
    30 years in the hose & coupling industry
    20 years marketing manager for fire equipment

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