Carrier 42C Series Product Data page 31

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