Specifications

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SECTION 2 VTG-IOM-2012-1001 INSTALLATION
2-17
A
B
7
3
5
2
7
4
6
6
5
V
P
+H-H
3
15
16
Supplied with
Boiler
FIGURE 10  FUEL SUPPLY
Figure 10 Legend and Notes
H Pump/Foot valve height di erence
L Piping length
O Inside Pipe Diameter
2 Pump
3 Filter
4 Manual On/O Valve
5 Suction Line
6 Foot Valve
7 Return Line
1. The tank is higher than the pumping unit (A): The distance “P”
must not exceed 33 ft in order to avoid subjecting the pump’s
seal to excessive strain; the distance “V” must not exceed 13 ft in
order to permit pump self priming even when the tank is almost
completely empty.
2. The tank is lower than the pumping unit (B): Pump suction
pressures higher than 13”Hg for Suntec oil pump and 15”Hg
for Webster 2 Stage 22R oil pump must not be exceeded. This
is because at higher levels, gas is released from the fuel and the
pump starts making noise and its working life-span decreases.