Page 112 - Webster Service Manual

107
MOTOR HORSEPOWER (1725 RPM STANDARD)
Under pressure, read
horsepower required at 1750 RPM
Maximum
Pump
gph
25
100 200
300
Model
Nominal
psi
psi
psi
psiI
18
BR 82
.25
.25
.25
.33
37
BR 159
.25
.25
.50
.75
47
BR 220
.25
.50
.75
1.00
59
BR 292
.25
.50
.75
1.50
SPMB Duplex Ordering Code
When ordering SPMB Duplex models add suffix:
DM,” for manual control models, or “DA,” for
automatic control models.
Example: SPMB-50AT/18BR-DA
Code
Duplex Units
DM
Duplex with manual controls
DA
Duplex with automatic controls
4
5
A large diameter inlet pipe or hose necked-down at the pump
is preferable to a longer length of similar diameter pipe
because the fuel tends to adhere to the inside of the pipe.
When initially starting a unit, it is desireable and sometimes
necessary to have a vent valve or plug on the pressure side of
the pump to facilitate its priming.