BE Pressure supply 2" Fire Fighting Cart HPFC-2070R - Manual (Page 14)

14
operation
What is “Head”
Head refers to the height of a column of water that can be delivered by
the discharge of the pump.
Suction Head is the vertical distance between the center of the pump
and the surface of the liquid on the suction side of the pump. May also
be referred to as “suction lift”. The atmospheric pressure of 14.7 psi at
sea level limits suction head lift to less than approximately 26 feet for any
pump.
Discharge Head is the vertical distance between the pump’s discharge
port and the point of discharge, which is the liquid surface if the hose is
submerged or pumping into the bottom of a tank.
Total Head is the sum of the suction head value plus the discharge head
value.
As water pumping height increases, pump output decreases. The length,
type, and size of the suction and discharge hoses can also significantly
affect pump output.
It is important for the suction operation to be the shorter part of the total
pumping action. This will decrease the priming time and improve pump
performance by increasing the discharge head.
Suction head is a maximum of 25 feet and discharge head should be a
maximum of 81 feet. Total head can not be more than 106 feet as shown
on next page.
Move Water Pump to Safe Operating Location
For best pump performance, locate the pump on a flat, level surface as
close as possible to the water to be pumped. Secure water pump to
avoid tipover. Use hoses that are no longer than necessary.
IMPORTANT:
Direct open end of discharge hose away from home,
electrical devices or anything not desired to get wet.
WARNING
Fuel and its vapors are extremely flammable and
explosive.
Fire or explosion can cause severe burns or death.
• This water pump is not for use in mobile equipment or marine
applications
• DO NOT tip engine or equipment at angle which causes fuel to spill.
• Secure water pump. Loads from hoses may cause tip over.
operation