Installation 21
Cat. No. 01016370
Installing the Gravel Support Bed
1. Verify that the correct type and amount of gravel for the system is on site. The proper amount of gravel is
indicated on the following table. If the correct type and amount of gravel is not on site, DO NOT load the tank.
Contact the equipment provider for assistance.
Table 6.
Non-ASME Code
Steel Tanks
ASME Code
Steel Tanks
Model Tank
Diameter
Drain
Line
1/8” x 1/16”
Gravel (lbs)
1/8” x 1/16”
Gravel (lbs)
Resin
Resin Qty (Ft.
3
) Freeboard “M”
150 20” 1” 100 100 5 25.5”
210 24” 1” 200 200 7 24.0”
300 30” 1-1/4” 300 300 10 26.5”
450 30” 1-1/4” 300 300 15 21.0”
600 36” 1-1/4” 400 500 20 24.5”
750 42” 2” 600 800 25 26.25”
900 42” 2” 600 800 30 20.5”
2. Make sure all manual valves are closed. Remove the hand-hole or manhole cover located in the top of the tank.
Visually inspect the distributor system (laterals and plastic distributors) in the bottom of the tank.
3. Make sure all manual valves are closed. To prevent damage to the distribution system, add approximately 2
feet of water to the resin tank with a hose (Figure 28). It is not recommended that the resin tank be entered to
receive and load the gravel. With water in the resin tank, carefully pour the gravel slowly into the resin tank,
leveling as loading progresses. On resin tanks with only a hand-hole in the top, it is recommended that a funnel
be used to load the gravel into the resin tank to help prevent spillage. When properly loaded, the gravel should
cover the distributor system in the bottom of the tank. If it does not, contact the equipment provider before pro-
ceeding to Step 4.
CAUTION! Should it be necessary to enter the resin tank, it is recommended that a respirator be
worn by any person entering the tank to load gravel. Wet the bags of gravel to reduce
the amount of dust caused by the loading procedure.
4. Level the Gravel Support Bed. An easy way to determine the uniformity of the gravel support bed is to add
water to the surface of the gravel. It may be necessary to add or remove water to insure that the water level is
at or near the same height of the gravel level. Make certain that no foreign materials are left in the tank. This
includes the bags that the gravel is shipped in.
RESIN
TANK
FREEBOARD
-"M" DIMENSION
DISTRIBUTOR
SYSTEM
(FROM TOP
OF RESIN BED
TO TOP OF
SIDESHELL)
Figure 26.
Figure 27.
Figure 28.
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