40
103536-08 - 4/18
Figure 24: Two Pipe Oil Lines
C.
TWO PIPE OIL LINES
1. For two piped systems, where more lift
is required, the two-stage fuel unit is
recommended. Table 9 (two-stage) and Table
10 (single-stage) show allowable lift and
lengths of 3/8 inch and 1/2 inch OD tubing for
both suction and return lines. Refer to Figure
24.
2. Follow the oil pump manufacturer’s
recommenda-tions on the proper connections
for a two pipe system. Some manufacturers
require the insertion of a bypass plug.
3. Under no circumstances is a manual shutoff
valve to be located on the return line of a two
pipe system. Accidental closure of the return
line will rupture the oil pump seals.
Lift "H"
(See Fig. 22)
Maximum Length of Tubing
"H" + "R" (See Figure 24)
3/8" OD Tubing
(3 GPH)
1/2" OD Tubing
(3 GPH)
0'
93'
100'
2'
85'
100'
4'
77'
100'
6'
69'
100'
8'
60'
100'
10'
52'
100'
12'
44'
100'
14'
36'
100'
16'
27'
100'
18'
---
76'
Table 10: Single-Stage Units (3450 RPM) - Two Pipe
Systems
Lift "H"
(See Fig. 21)
Maximum Length of Tubing
"H" + "R" (See Figure 24)
3/8" OD Tubing
(3 GPH)
1/2" OD Tubing
(3 GPH)
0'
84'
100'
1'
78'
100'
2'
73'
100'
3'
68'
100'
4'
63'
100'
5'
57'
100'
6'
52'
100'
7'
47'
100'
8'
42'
100'
9'
36'
100'
10'
31'
100'
11'
26'
100'
12'
21'
83'
13'
---
62'
14'
---
41'
Table 9: Two-Stage Units (3450 RPM) - Two Pipe
Systems
Section VII: Oil Piping (continued)
Summary of Contents for MegaSteam MST288
Page 54: ...54 103536 08 4 18 Bare Boiler Assembly Section XII Repair Parts continued...
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