©Copyright Task Force Tips LLC 2014-2021
18
LIA-208 May 19, 2021 Rev05
6.5.1 RELIEF VALVE PRESSURE SETTING
To set the relief valve pressure turn the adjusting screw
on the relief valve housing until the surface of the screw is
even with the desired pressure. A 9/16” (14 mm) socket
or a 1/4” hex key may be used to turn the adjusting screw.
The Pressure relief valve should not be disabled (IE:
capped, plugged, or set to the OFF position) for normal
service conditions. Disabling the relief valve may result in
system damage or hose rupture if the system exceeds
operating limits. The pressure relief valve meets the
requirements of NFPA 1901.
6.6 PRESSURE LOSS
Figure 6.6
6.7 SUCTION SCREEN
This device may be equipped with a suction screen to catch debris larger than 3/8” diameter in the waterway. See the chart to determine
additional loss caused by the screen. To add or replace a suction screen, order TFT part #A1410-KIT.
Figure 6.7
Table 6.5.1
Adjusting Screw
Optional
Threaded Outlet
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
2000
4000
6000
8000
10000
0
2
4
6
8
10
0
500
1000
1500
2000
2500
FLOW (LPM)
FLOW (GPM)
5 INCH COUPLING
LOSS (PSI)
LOSS (BAR)
6 INCH COUPLING
0
5
10
15
20
25
30
35
FLOW (GPM)
LOSS (PSI)
0
0.5
1
1.5
2
FLOW (L/min)
LOSS (BAR)
4.5" Waterway
5.0" Waterway
0
1000
2000
3000
4000
5000
6000
7000
0
1000
200
400
600
800
1200
1400
1600
1800
2000
