4
Claw Medical Vacuum Systems
Pipe Size requirements
System CFM
Minimum Pipe
Size for
100 feet
Minimum Pipe
Size for
300 feet
Minimum Pipe
Size for
600 feet
5
1.0
1.25
1.5
7
1.0
1.25
1.5
11
1.25
1.5
1.5
21
1.25
1.5
1.5
26
1.25
1.5
2.0
32
1.25
1.5
2.0
38
1.5
2.0
2.5
52
1.5
2.0
2.5
58
1.5
2.5
2.5
63
2.0
2.5
2.5
65
2.0
2.5
3.0
87
2.0
2.5
3.0
104
2.0
3.0
3.5
111
2.5
3.0
3.5
154
2.5
3.0
3.5
156
2.5
3.5
4.0
168
2.5
3.5
4.0
195
3.0
3.5
4.0
258
3.0
3.5
4.0
260
3.5
4
5.0
387
3.5
4
5.0
516
4
5
6.0
If the system extends beyond 600 equivalent straight feet, use one
size larger pipe.
approximate system CFm equals the number
of pumps running times CFm in table below.
(Data below is for reference only, if actual pump
CFm is higher than shown, use the higher value.)
HP
Vane Pump
CFM @ 19”
Claw Pump
CFM @ 19”
1.0
2.0
1.5
7
2.0
11
16
3.0
17
21
4.0
29
5.0
26
5.0
38
5.4
38
6.4
52
7.5
52
65
8.7
77
10.0
65
84
10.0
77
15.0
111
129
20.0
137
25.0
168
Pipe Size
Equivalent length
for 90° elbow, cross,
or tee
Equivalent length
for 45° elbow
3.0 feet
1.5 feet
1.5
3.75 feet
1.8 feet
2.0
5.0 feet
2.5 feet
2.5
6.25 feet
3.1 feet
3.0
7.5 feet
3.8 feet
3.5
8.78 feet
4.4 feet
4.0
10.0 feet
5.0 feet
5.0
12.5 feet
6.25 feet
