Carrier 42C Series - Page 31

31
C
V
FACTOR:
The flow rate in gallons per minute (gpm) through a piping component when the pressure drop ('P) in pounds per square inch (psi)
across the component is 1.0 (psi).
Pressure drop (ft-H
2
O) = 2.31 x psi (pressure drop)
GRAPH EXAMPLE:
'P for 2.0 gpm through a component with a C
V
of 1.0 is 4.0 psi x 2.31 = 9.24 ft-H
2
O
FORMULA EXAMPLE:
TOTAL PRESSURE DROP is the Sum of the pressure drop of all piping and components in the water flow path.
'P (ft-H
2
O) =
(gpm)
2
x 2.31 =
(2.0)
2
x 2.31 = 9.24 ft-H
2
O
(C
v
)
2
(1.0)
2
Cv FACTOR VS WATER PRESSURE DROP