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PAGE # 8
PF-50 Series Filter (ver. 4/5/05)
LOADING MEDIA
The filter media should be installed as follows; Refer to Table lV for media quantities.
One Bag = 1 cubic foot.
The 50-Series filter units is supplied with two types of media (support gravel and filter media). The support
gravel is used at the base of the filter below the underdrain to support the filter media. The filter media is
a spherical based crystalline silica and will remove up to 90% by volume of the suspended solids
10 microns and larger. The filter media will be shipped in 1/2 cubic-foot drums.
1. To load the filter media in the PF-50 series filter, remove the hex nut and crab clamp from the
handhole/manhole ring (be careful not to drop the handhole/manhole into the vessel.) Press down on the
handhole/manhole cover until it drops loose. Remove the gasket and rotate the handhole cover lifting it
through the tank ring. Inspect the internals for damage before continuing.
2. Fill the vessel with water until the underdrain assembly is completely submerged in water. Load the
support gravel into the filter vessel first and level it out, then load the 10 micron silica into the vessel and then
level. Refer to Table IV for the amount of media required for each individual PF-50 series filter.
3. Inspect the handhole/manhole, gasket, ring, and cover for foreign matter, and clean all surfaces. Place
the handhole/manhole cover into the vessel. Slip the gasket over the handhole/manhole and reinstall the
crab clamp and hex nut. Align the gasket and crab clamp properly with the handhole/manhole and ring,
before tighten the hex nut. Do not overtighten the hex nut. Overtightening hex nut can damage gasket.
4. Always follow start-up procedures whenever the filter unit has been turned off.
TABLE IV - MEDIA REQUIREMENTS
QUANTITIES SHOWN IN 1/2 CU.FT.
Model PF-50
Support Media
Filter Media
12
1
1
18
2
2
24
3
5
30
4
5
36
7
10
42
14
13
* Media quantity depend on vessel construction.
