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Post by CAP 603 on Feb 24, 2009 21:24:11 GMT -5
My department is looking at putting a pre-connected(tank line) 200' with a smooth bore nozzle into service soon. I would like to know what kind of engine pressures other department are using? Thanks
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Post by HANKINS on Feb 24, 2009 23:33:37 GMT -5
Jonny,
Our Preconnected 2 1/2" line has the breakaway nozzle on it. When I spin the fog off and put the SB on it, we run about 82psi EP for a 1 1/8" tip. Thats 16# per 100' pl;us the 50# NP.
If you spin up to the 1 1/4" tip you will run about 94psi EP.
Let us know when you want to start training with that line. I'll take 3's down south or 7's out west if covering a shift.
Later Bro
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Post by Billy Lewis on Feb 25, 2009 0:05:27 GMT -5
Hummm I'm smelling some big line training coming up on the 28th, stand by.
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Post by baldy on Feb 25, 2009 0:37:51 GMT -5
Johnny:
Here are the numbers we use in the city. You'll find that most of the numbers you'll see will be within a pound or two of each other. As usual, we use the following formula:
EP=NP+FL+H+/-A (Engine pressure =nozzle pressure + friction loss+ head (elev) +/- appliance)
Engine pressure based on tip size and length of hose (no head, no appliances):
GPM NP TIP 100' 150' 200'
265 50 1 1/8" 70 75 80
325 50 1 1/4" 75 85 95
I'm sure if you wanted to use the Q2 formula, that these numbers would vary a bit.
Drop me a line if you want a copy of our hydraulic chart...
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Post by CAP 603 on Mar 2, 2009 20:28:32 GMT -5
Thanks for the all the help.
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