Nozzle Pressures
Smooth-bore handline
50 psi
Greater than 350 GPM
+10 psi
What is the Friction Loss Formula?
FL=C x Q2 x L
0 t- 10% drop =
3 more like lines
100' Bumper Line w/fog nozzle
130 psi
Smooth-bore, Master
80 psi
Less Than 350 GPM
0 psi
What is FL
Friction Loss
11 - 15 % drop =
2 more like lines
200' crosslay w/smoothbore
110 psi
Fog, handline
100 psi
Master Stream Device
+ 25 psi
What is C
Coefficient for the hose
10 - 25 % =
1 more like line
400' Rear Discharge 200' of 2.5 reduced to 200' of 1.75 w/fog nozzle
180 psi
Fog, master
100 psi
Standpipes
+ 25 psi
What is Q?
Quantity or GPM
25+ =
No additional lines
250' rear discharge 2.5' hose w/ fog nozzle
125 psi
Deck Gun w/ Fog nozzle
125 psi
What id MFD's PDP for Automatic Sprinkler systems?
150 psi..... Note: gradually increase pressure to 150.
What is L
Length of hose
What is the % drop formula?
(SP-RP)/SP
Standpipe
200 psi