A 900-gpm fire flow will create 48 psi of pressure loss per 100 feet with the two 2½-inch lines setup and has 18.5 psi of pressure loss per 100 feet of supply ... Fire Hose Friction Loss.

The friction loss in five-inch hose is approximately 15 psi. Divide 15 psi into 30 psi and you come up with two. So, 1,500 gpm can be delivered through five-inch hose 200 feet.

The friction loss in the tandem pumping discharge lines. ... The friction loss in a 50-foot, 2½-inch hose is 25 psi. That’s not that high of a pressure to be overcome with engine pressure.

The friction loss coefficient of these models vary from 7.0 to 11.5. As the friction loss coefficient varies so does the amount of pressure that will be lost.

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The loss in force is typically 1 to 10 psi of the cylinder’s theoretical force output, depending on the type of seal. Cylinders with side loads, misalignments or specialty features have even ...

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