Flow rate gpm
5
10
15
18
20
25
30
35
40
Best control 1 ¼’’ psi loss
/
0.5 1.5 2.5 3.5 5.5 7.5
10 12.5
Best control 1’’ psi loss 0.5 1.5
4
6.5 8.5
/
/
/
/
Use BEST CONTROL 1” in a bypass when friction loss is excessive.
Flow rate gpm 20
30
40
50
60
70
80
Best control 1” x 1’’ psi loss
3
5
9
14
19
/
/
Best control 1” x 1 ¼’’psi loss
2
2
3
5
8
10
12
Best
control
1”
x
1
½’’psi
loss
2 2 3 4 6 7 8
Pressure Loss Chart with a bypass application with Best control 1” *
PRESSURE LOSS - BYPASS APPLICATION
- 8 -
BEST CONTROL 1”
Gauge
1’’
1’’
Gate valve
Spring check valve
System pipe
System pipe
The main pipe of bypass must not exceed 1 1/2”, while the system pipe could be bigger.
Main pipe bypass
1’’, 1 ¼’’, 1 ½’’
* Available on request.
Pressure Loss Chart
