| MONDAY NIGHT TRAINING |
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| Monday Night Training For May 12th |
| This is the Turbojet model 1723 made by Akron Brass. This nozzle is an adjustable gallonage, constant flow nozzle. It will flow 150 GPM at 75 psi. It is also known as a low pressure fog nozzle. The flow will be the same regardless of how the stream is straight stream. We carry this nozzle only on tanker 22. |
It's vitally important to know what type of
nozzles we use here in Brunswick Hills.
We need to know this information
because different nozzles operate in
information we need is what is the
operating pressure of our nozzles and
what GPM's do they flow. We use this are
two types of nozzles, smooth bore and
combination. Although we do not carry
smooth bore nozzles, we do have master
stream tips that work just like smooth
bore nozzles, without of course the need
to determine hose line friction loss.
Combination nozzles can further be
classified in many ways. We will talk
about the nozzles that we currently have.
The first is the adjustable gallonage,
constant flow nozzle pictured in figure 1.1
to the right. See picture for details. The
next nozzle style is the most common one
we have. It is a fixed gallonage, fixed
pressure nozzle. It allows for a lot less
thinking by the pump operator, because
the GPM's are always the same,
assuming nozzle pressure is kept at the
required 75 psi. We have two styles of
this nozzle, one for our smaller lines and
one for the 2 1/2" line. The best part
about the two nozzles is that they both
operate at 75 psi. It is extremely
important to know what nozzles are on
your handlines when you come into work.
For people like me who do not run shifts
during the day, we have to constantly
check our nozzles and remember which
trucks carry which nozzles.
DONT FORGET THIS FORMULA!
FL = CQ(squared)L
FL= Friction Loss
Q= GPM/100 (this is the one part of
the FL formula that deals with
nozzles)
C=Coefficient
Also remember:
TEP=FL+DL+NP+EL
TEP= Total Engine Pressure
FL=Friction Loss
DL=Device Loss
NP=Nozzle Pressure
EL=Elevation Loss
nozzles we use here in Brunswick Hills.
We need to know this information
because different nozzles operate in
information we need is what is the
operating pressure of our nozzles and
what GPM's do they flow. We use this are
two types of nozzles, smooth bore and
combination. Although we do not carry
smooth bore nozzles, we do have master
stream tips that work just like smooth
bore nozzles, without of course the need
to determine hose line friction loss.
Combination nozzles can further be
classified in many ways. We will talk
about the nozzles that we currently have.
The first is the adjustable gallonage,
constant flow nozzle pictured in figure 1.1
to the right. See picture for details. The
next nozzle style is the most common one
we have. It is a fixed gallonage, fixed
pressure nozzle. It allows for a lot less
thinking by the pump operator, because
the GPM's are always the same,
assuming nozzle pressure is kept at the
required 75 psi. We have two styles of
this nozzle, one for our smaller lines and
one for the 2 1/2" line. The best part
about the two nozzles is that they both
operate at 75 psi. It is extremely
important to know what nozzles are on
your handlines when you come into work.
For people like me who do not run shifts
during the day, we have to constantly
check our nozzles and remember which
trucks carry which nozzles.
DONT FORGET THIS FORMULA!
FL = CQ(squared)L
FL= Friction Loss
Q= GPM/100 (this is the one part of
the FL formula that deals with
nozzles)
C=Coefficient
Also remember:
TEP=FL+DL+NP+EL
TEP= Total Engine Pressure
FL=Friction Loss
DL=Device Loss
NP=Nozzle Pressure
EL=Elevation Loss
Figure 1.1
Figure 1.2
| This is our fixed pressure, fixed gallonage nozzle that we carry on L-26 and on E-21. They are the Akron Brass model 4817 and I'm not sure of the model number for the 2.5". |
| PREVIOUS MONDAY NIGHT TRAININGS |
| THE ARGUMENT FOR SMOOTH BORE NOZZLES |
we agreed that they would be very
useful. The biggest advantage is the
lower operating pressures and higher
GPM's. Several firefighters have
pushed for these nozzles and Chief
Cseh appeared interested in pursuing
the idea. We discussed how to operate
them and how to figure your friction
losses as well. Smooth bore nozzles
operate at a minimum of 50 psi, while
master streams operate at 80 psi.
There is a chart down below you can
download that lists GPM delivery for
certain size smooth bore nozzles at
different psi. The apartment pack was
opened to uncover a combination
nozzle that we agreed should be a
smooth bore nozzle. Stay tuned for
more info.
useful. The biggest advantage is the
lower operating pressures and higher
GPM's. Several firefighters have
pushed for these nozzles and Chief
Cseh appeared interested in pursuing
the idea. We discussed how to operate
them and how to figure your friction
losses as well. Smooth bore nozzles
operate at a minimum of 50 psi, while
master streams operate at 80 psi.
There is a chart down below you can
download that lists GPM delivery for
certain size smooth bore nozzles at
different psi. The apartment pack was
opened to uncover a combination
nozzle that we agreed should be a
smooth bore nozzle. Stay tuned for
more info.