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Table 2.2 Exhaust Pipe Length
Pump
Laboratory
Connection
Units
1.5 Hp
1.25
2 Hp
1.25
3 Hp
1.25
5 Hp
1.25
1
5 Hp
2
2
7.5 Hp
2
10 Hp
2
15 Hp
3
20 Hp
3
25 Hp
3
1.5 Hp
1.25
2 Hp
1.25
3 Hp
1.25
5 Hp
1.25
1
5 Hp
2
2
7.5 Hp
2
10 Hp
2
15 Hp
3
20 Hp
3
25 Hp
3
5 Hp
2
2
7.5 Hp
2
10 Hp
2
15 Hp
3
20 Hp
3
25 Hp
3
5 Hp
2
2
7.5 Hp
2
10 Hp
2
15 Hp
3
20 Hp
3
25 Hp
3
Notes:
1. 5 Hp pump model RA0100. Incorporated into horizontal tank mount system designs.
2. 5 Hp pump model RA0155. Incorporated into base mount system designs.
3. All pipe sizes are based on the following: copper pipe (Type L), 14.7 psia.
4. The minimum pipe size must be maintained for the total length of the exhaust pipe. Use next larger size pipe in
the event the minimum size is not available.
5. When determining the total pipe length, add all the straight lengths of pipe together in addition to the number
of elbows times the eff ective pipe length for that pipe size. (See Table 2.3 and following example.)
Lubricated Rotary Vane Laboratory Vacuum Systems
System Exhaust Pipe Length (ft) - See Notes
25
50
75
100
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.5
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
1.25
1.25
1.25
1.25
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
3
3
3
3
3
3
3
3
4
4
4
4
5
5
5
5
6
6
6
6
6
6
6
6
150
200
250
1.25
1.25
1.25
1.25
1.25
1.25
1.25
1.5
1.5
1.5
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
4
4
1.25
1.25
1.5
1.5
1.5
2
2
2
2
2
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
5
5
3
3
3
3
4
4
4
4
4
4
5
5
5
5
5
5
5
6
3
4
4
4
4
4
4
4
5
5
5
5
6
6
6
6
6
6
2-5
300
350
400
450
1.25
1.25
1.25
1.25
1.25
1.25
1.5
1.5
1.5
1.5
1.5
2
2
2
2
2
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
1.5
1.5
1.5
1.5
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
5
5
5
5
5
5
3
4
4
4
4
4
4
4
5
5
5
5
5
5
6
6
6
6
4
4
4
4
4
4
5
5
5
5
6
6
6
6
6
6
8
8
4107 9021 88.01
500
1.25
1.5
2
2
2
2
3
3
3
3
3
3
4
4
4
4
4
4
1.5
2
2
3
3
3
3
3
3
4
4
4
4
4
5
5
5
5
5
4
4
4
4
5
5
5
5
6
6
6
6
4
4
4
4
5
5
6
6
6
6
8
8
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