FRC TankVisionPro WLA300 - Install Pressure;Vacuum Foam Tank Vent

WLA300 Rev170606
13
Install Pressure/Vacuum Foam Tank Vent
A pressure/vacuum foam tank vent is supplied for use on sealed foam tanks. The
recommended location to mount the vent is in the cover of the foam tank ll tower. If
there is no ll tower, mount the vent at the highest point of the tank top so that it is not
immersed in foam. For installations where clearance above the ll tower is limited, a
90° mounted vent is available.
Note: The vent can compensate for a maximum foam concentrate ow rate
of 60 GPM. If the ow rate of foam concentrate from the tank will exceed
60 GPM, two (2) vents will be required.
Install Top Mounted Tank Vent
The top mounted tank vent is mounted in a vertical position through a 1 1/8-inch
hole on the lid of the ll tower and is secured by a hand tightened nut.
Note: The tank vent must be in a vertical position and can not be immersed
in foam.
1. Measure and mark mounting location for vent. Make sure there is clearance
for the valve before drilling hole. Refer to Figure 4 for dimensions.
2. Drill 1 1/8-inch diameter hole.
3. Insert vent into the hole with the gasket in place.
4. Screw on nut and hand tighten.
Install 90° Mounted Tank Vent
The 90° mounted tank vent is mounted on a vertical side of the ll tower. It must
be located as close to the top of the ll tower as possible. The vent is held in place with
two (2) 1/4-20 x 3-inch bolts, washers, and locknuts.
Note: The tank vent must be in a vertical position and can not be immersed
in foam.
1. Measure and mark mounting location for vent. Make sure there is clearance
for the valve before drilling holes. Refer to Figure 4 for dimensions.
2. Drill 3/4-inch diameter hole and two through holes for 1/4-20 bolts.
3. Apply sealant to mounting surfaces and bolt holes.
4. Secure vent in place with two bolts, washers, and locknuts.