Overview of Primary Product

Pressure
=
Head (Feet) x Specific Gravity
(PSI) 2.31
Head
=
Pressure (PSI) x 2.31
(Feet) Specific Gravity
Vacuum
=
Dynamic Suction Lift (Feet) x .883
(Inches of Mercury) x Specific Gravity
Horsepower
=
GPM x Head (Feet) x Specific Gravity
(Brake) 3960 x Pump Efficiency
Horsepower
=
GPM x Head (Feet) x Specific Gravity
(Water) 3960
Efficiency
=
Horsepower (Water)
x 100 Per Cent
(Pump) Horsepower (Brake)
NPSH
= Positive Factors – Negative Factors
(Available)
GPM Capacity Ft. Head BHP
Impeller
Diameter
Change
Speed
Change
Table of Contents
Useful Pump Formulas ........................................... 2
Standard Features .............................................. 3
Technical Data ................................................. 4
Materials of Construction ......................................... 5
Selection Charts ................................................ 6
Performance Curves ............................................. 7
Centrifugal Pump Dimensions ..................................... 8-9
The B&G End Suction Pump System ................................. 10
Typical Specifications ............................................ 11
Useful Pump Formulas
Affinity Laws: Effect of change of speed or impeller diameter on centrifugal pumps.
Where Q = GPM, H = Head, P = BHP, D = Impeller Dia., RPM = Pump Speed
Q
2 =
D2
D1
Q1
Q2 =
RPM2
RPM1
Q1
H2 =
(
RPM2
RPM1
)
2
H1
P2 =
(
RPM2
RPM1
)
3
P1
P2 =
(
D2
D1
)
3
P1H2 =
(
D2
D1
)
2
H1
2