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Fiberglass Cooling Towers Chapter 3: Installation Page 16 of 25
3-6 Setting Up the Water Balancing Valve
Install the plug provided in the unused water inlet on the side of the tower. Tighten and check
for leaks.
To prevent damage to the tower fill material, use the water throttling valve and pressure
gauge to regulate the water pressure to the tower spray nozzle(s). The recommended
throttling valve is a butterfly-type valve that can be locked in the correct position with a
locknut. See Figure 6 for recommended throttling valve pressures.
Figure 6: Throttling Valve Pressures
Pressure Model
psig KPa
SF2003 10 psig 68.95
SF2004 7 psig 48.26
SF2005 3 psig 10.68
SF2007 5 psig 34.47
SF2009 6 psig 41.37
SF2011 8 psig 55.16
SF2015 10 psig 68.95
Warning! Exceeding these pressure limits will damage the tower fill and nozzle and void
the tower warranty.
3-7 Initial Start-up
Check for proper rotation on all fan and pump motors. Refer to the arrows atop the tower and
on pump housings.
Fill the system with water and adjust the float valve if you are using a float. Maintain a water
level in the tower basin approximately one inch (25 mm) below the overflow opening.
The tower basin acts as a sump to maintain water level. Towers using inside tanks do not
carry water in the basin.