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3. HYDRAULIC SYSTEMS
GRAVITY FEED from the bottom of the oil storage tank
GRAVITY FEED over the top of the oil storage tank
SUCTION FEED
H = Difference in height;
L = Total lenght of the suction line, including the vertical section;
The copper pipes of 8 mm and 10 mm I.D., as shown on the tables above, may be replaced by steel pipes of 1/4" or 3/8" Gas.
L meters
H
øi
meters
8 mm
0.5
5
1
10
1.5
15
2
20
The dimension P should not exceed 10 m, to
avoid breakage of pump seals.
L meters
H
øi
meters
8 mm
0
32
0.5
28
1
24
1.5
20
2
16
3
7
3.5
-
The dimension P should not exceed 10 m, to
avoid breakage of pump seals.
L meters
H
øi
meters
8 mm
0
32
0.5
28
1
24
1.5
20
2
16
3
7
3.5
-
4
øi
10 mm
10
20
30
40
øi
10 mm
70
62
55
48
40
25
10
Oil lines must be perfectly
sealed. The use of cop-
øi
per pipe is therefore rec-
10 mm
ommended.
70
The pump suction must
62
not exceed 4 m w.c. (30
cm Hg) because beyond
55
this
value
48
becomes noisy.
40
The return line must ter-
25
minate at the same level
10
as the foot valve; other-
wise
the
become air-locked.
the
pump
pump
may
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