Two-Pipe Oil Lines; Two-Pipe Installation - Burnham BOILERS Operating/Service Instructions Manual

TABLE 2: SINGLE STAGE UNITS (3450 RPM)
TWO PIPE SYSTEMS
Maximum Length of Tubing
"H" +"R" (See Figure)
Lift "H"
(See Figure)
3/8" OD
Tubing (3 GPH)
0' 84'
1' 78'
2' 73'
3' 68'
4' 63'
5' 57'
6' 52'
7' 47'
8' 42'
9' 36'
10' 31'
11' 26'
12' 21'
13' ---
14' ---
1/2" OD
Tubing (3 GPH)
100'
100'
100'
100'
100'
100'
100'
100'
100'
100'
100'
100'
83'
62'
41'
Figure 22: Two-Pipe Installation
29
TABLE 3: TWO-STAGE UNITS (3450 RPM)
TWO-PIPE SYSTEMS
Maximum Length of Tubing
Lift "H"
"H" + "R" (See Figure)
(See Figure)
3/8" OD
Tubing
0'
2'
4'
6'
8'
10'
12'
14'
16'
18'
C

. Two-Pipe Oil Lines

1. For two-piped systems, where more lift is required,
the two-stage fuel unit is recommended. Table 2
(single-stage) and Table 3 (two-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 22.
1/2" OD
Tubing
93' 100'
85' 100'
77' 100'
69' 100'
60' 100'
52' 100'
44' 100'
36' 100'
27' 100'
--- 76'