5894
3
FUEL OIL GRAVITY FEED SYSTEMS
GRAVITY SYSTEM (fuel oil with viscosity max. 7°E at 50°C)
Pump priming: loose the tap of the
vacuometer plug 5) (fig. 1) and wait
for the fuel flow.
H
: Difference in the pipes height.
L
: Length of the suction pipe.
SUCTION SYSTEM (fuel oil with viscosity max. 7°E at 50°C)
Not advised, to be used only in case of previously existing system.
Never overcome the max. de-
pression of 0.5 bar (38 cm Hg).
With higher values the fuel em-
anates gas.
The pipes shall be perfectly
sealed. When the tank is
placed below of the burner lev-
el, the return pipe should reach
the same level of the suction
pipe.
In this case the foot valve is not
required.
RING SYSTEM (for heavy oil with viscosity up to 20°E/50°C)
1
- Tank (properly heated for heavy oil)
5
- Forwarding pump
2
- Filter (with resistance for oil > 7°E/50°C)
6
- Manometer
3
- Burner
7
- Burner pump
4
- Couple of cocks (excluding the burner)
8
- Pressure adjuster
Notice: All the pipes have to be properly seized, sealed and heated (elect. resistance or hot steam or water) to
let the fuel flow.
Warning: Before to put the burner in operation verify that no obstruction exists into the pipes, any obstruction may
damage the sealing of the pump.
H
meters
L meters
ø 3/4”
gas
ø 1”
gas
0
5
10
0.5
9
15
1
11
20
1.5
14
25
2
17
30
H
meters
L meters
ø 1”
gas
ø 1 1/4”
gas
0
24
45
0.5
21
40
1
18
35
1.5
15
30
2
12
25
2.5
9
20
3
6
15
