Page 104 - Webster Service Manual

99
SPECIFICATIONS
SPMV SERIES
AC High Capacity Fuel Oil Supply Units
Capacity:
430
to 1730 gph with fluid viscosity to 10,000 SSU.
Pressure:
Inlet pressure should not to exceed 3 psi.
Outlet pressure up to 500 psi.
Fluid Temperature Limits:
-20
° F to +200° F.
Motors:
Standard: 60 cycle, 1750 rpm, NEMA 56C frame.
1/2
through 7 1/2 hp available.
To be specified when ordering: Single-phase 115/230
VAC, or three-phase 230/460 VAC. ODP or TEFC.
Porting:
1”
NPT
(086
K-194K)
1 1/2
X 1 1/4 NPT
(237
K-388K)
Mounting:
Integral mounting foot.
Maximum Inlet Vacuum: 15” Hg
Continuous operation: 10” Hg
Use of external filter recommended.
In applying these supply units, the pressures indicated
are at the pump outlet. You must also consider line losses.
All pumps relying on atmospheric pressure to push the
fuel oil into them are subject to cavitation. As fuel vis-
cosity (thickness) increases, the tendency for cavitation
becomes greater. Therefore, it is best to mount the
pump at the base of the tank and to use the largest
diameter, shortest length, and straightest inlet possible.
A large diameter inlet pipe or hose necked down at the
pump is preferable to a longer length of smaller diame-
ter pipe because the fuel tends to adhere to the inside
of the pipe.
When initially starting a unit, it is desirable and some-
times necessary to have a vent valve or plug on the
pressure side of the pump to facilitate its priming.