5960 US Highway 64 East Ramseur, NC 27316     Phone: 336.824.2102     Fax: 336.824.2190     Email: mail@towercomponentsinc.com A wholly owned subsidiary of  Evapco
APPLICATIONS - Water Quality/Dirty Water Concerns - Film Fill Selection Guidelines

The following guidelines aid in determining the appropriate film fill for use in relation to water quality as pertaining to the total suspended solids (TSS,) total dissolved solids (TDS), biological control, oil & grease content and water-born fibers.

OP1200

TSS < 25 PPM (<10 PPM where bacterial activity is high)
Make-up water is coming from uncontaminated sources (potable or filtered source)
Biocidal water treatment program in use (oxidizing biocides & scale inhibitors)
TDS < 1,000 PPM as Calcium Carbonate
Minimal airborne contamination
No greases, oils, process contamination or fibers

OP 1900

TSS < than 100 PPM with good microbiological control (< 25 PPM where biological
control is poor)
Make-up water is coming from uncontaminated source (potable or filtered source)
Biocidal water treatment program in use (oxidizing biocides & scale inhibitors)
TDS < 5,000 PPM as Calcium Carbonate
Minimal airborne contamination
No greases, oils, process contamination or fibers

OP 2100 Plus OF

TSS < than 200 PPM with good microbiological control (<50 PPM where biological control is
poor)
Make-up water is coming from uncontaminated source (potable or filtered source)
Biocidal water treatment program in use (oxidizing biocides & scale inhibitors)
TDS < 5,000 PPM as Calcium Carbonate
Minimal airborne contamination
<1 PPM oil or grease concentration
No fibers

OP 1900 VAF

TSS < than 500 PPM with good microbiological control (<200 PPM where biological control is poor or if oil or grease)
Make-up water from surface waters
Good biological control
TDS < 5,000 PPM as Calcium Carbonate
Minimal airborne contamination
<5 PPM oil or grease concentration
No Fibers
OP 3000

TSS between 75 and 250 PPM
Make-up water is coming from surface waters
Good biological control
TDS < 5,000 PPM as Calcium Carbonate
Good scale control in effect
Some process contamination allowed
No greases, oils, or fibers

OP 7500

TSS < than 100 PPM with good microbiological control (< 25 PPM where biological control is poor)
Make-up water is coming from uncontaminated source (potable or filtered source)
Biocidal water treatment program in use (oxidizing biocides & scale inhibitors)
TDS < 1,000 PPM as Calcium Carbonate
Minimal airborne contamination
No greases, oils, process contamination or fibers


NOTE: Good biological-control procedure incorporates continuously supplied oxidizing biocide with bactericidal residuals maintained with total aerobic bacteria not exceeding 10,000 colony-forming units per ml (CFU/ml) with minimal slime formation on the heat transfer surfaces. Poor control references little or no microbiological control with high total aerobic bacteria counts of 100,000 CFU/ml.

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