CALCS Flashcards
pump discharge pressure equation
PDP = NP + FL + AP +/- EL
friction loss equation
C x (Q^2 x L) / 100
Q = GPM
L = length
coefficient of 1 3/4’”
15.5
coefficient of 2 1/2”
2
coefficient of 5”
0.08
appliance pressure for handlines
10 psi
appliance pressure for deckgun, monitor, and aerials
15 psi
elevation pressure
5 psi for every 10ft
solid tip nozzle reaction equation
solid = 1.57 x D^2 x NP
fog tip nozzle reaction equation
fog = .0505 x GPM x SqRt of NP
hydrant capacity equation
static - residual = difference
S x 1 = V 3
S x 2 = V 2
S x 3 = V 1
V greater than or equal to D = number of like amount of GPMs
GPM equation
29.7 x D^2 x SqRt of NP
Fire flow equation
(L x W)/3 x % involved
standpipe PSI
100 psi + 5 psi per floor minus 1st floor
sprinkler system PSI
150 psi
cellar nozzle GPMs
450 gpm
piercing nozzle GPMs
125 gpm
deck gun PDP
always 95
handlines nozzle pressure
50 psi
elkhart nozzle pressure
40/50/60 psi
masterstreams nozzle pressure
80 psi
broken stream nozzle pressure
100 psi
master stream fog nozzle pressure
70-120 psi (100 if range not an option)
1 3/4” tip sizes and GPMs
TFT Metro 1 - 150
7/8” - 160
15/16” - 180
2 1/2” tip sizes and GPMs
1” - 200
1 1/8” - 250
1 1/4” - 325
master stream tip sizes and GPMs
1 3/8” - 500
1 1/2” - 600
1 3/4” - 800
2” - 1000
Elkhart tip sizes, GPMs, and PSIs
1 3/16”
2 1/2”
265 gpm - 40 psi
300 gpm - 50 psi
325 gpm - 60 psi
