6 Hoze Nozzles And Flow Rates Flashcards
Operating psi for solid stream master stream nozzle
80 psi
For the discharge formula in gpm go a solid nozzle, d stands for
Diameter of orifice in inches
For the discharge formula in gpm go a solid nozzle, NP stands for
Nozzle pressure in psi
Type of fog nozzle mechanism that can make a narrow pattern but more often provides a wide angle pattern
Impinging stream.
Fog pattern created by deflecting water around inside circular stem then exterior barrel.
Periphery deflected
Type of flow nozzle that is designed to flow specific volume on all patterns at a specific discharge pressure
Constant flow fog nozzle
Type of flow fog nozzle that allows operator to select the flow rate
Selectable gallonage
Type of flow fog nozzle that allows a change in pattern while maintaining the same nozzle pressure. Change in gallonage causes nozzle to adjust and stream appearance remains suitable
Automatic nozzle
Although stream produced by an automatic nozzle may appear adequate, if proper discharge pressure is not applied, the stream may not
Flow sufficient water for fire suppression
High pressure fog nozzles operate at pressure up to
800 psi.
Gallonage flow for high pressure fog nozzles is what
Low.
Generally the maximum gpm for a handline is
350 gpm
Fog nozzle master streams are generally operated at what psi
100
Master stream commonly called deck gun. Permanently mounted on apparatus
Fixed monitors
Master stream mounted on apparatus that is removable. May have flow limitations when used on ground.
Combination monitors
Master stream stored on the apparatus for deployment wherever it’s needed
Portable monitors
Type of nozzle sometimes referred to as a distributor nozzle, although they are different.
Cellar nozzle
Cellar nozzles can also be deployed where
In attics or void spaces
Type of nozzle also known as a penetrating nozzle
Piercing nozzle
The tip of a percent nozzle is an impinging jet nozzle capable of what flow
Appx 125 gpm. At 100 psi
What is at the opposite end of a piercing nozzle
Striking surface to drive nozzle
A type of nozzle typically brass with impinging holes fed by a booster hose for use down a stove flu
Chimney nozzle
Flow rate of a chimney nozzle
1.5-3 gpm at 100 psi.
As water is discharged from a nozzle, the counter force pushes back. This is called
Nozzle reaction
NR stands for
Nozzle reaction in pounds
Simple calculation for foreground nozzle reaction of solid stream
NR= Q/3
Q for nozzle reaction formulas stands for
Total flow through nozzle in gpm
Simple fireground calc for fog nozzle reaction.
NR = Q/2
Operating psi for solid stream handling nozzle
50 psi
