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INSTALLATION INSTRUCTIONS
1
DEMA MODEL 163-2DF-2
DUAL FEED PROPORTIONER
1. PARTS
A. Proportioner Assembly
B. 2 pcs. Supply tubing with foot valve & ceramic weight.
C. Outlet tubing (3' Lg.)
D. Metering tip kit
2. INSTALLATION AND ADJUSTMENT
Screw proportioner onto garden hose outlet or faucet. Select metering tips using Table 1 as a guide and screw into each inlet
barb. Attach the 3 foot length of tubing to the proportioner outlet. This tubing must remain attached or proportioner will not
draw. Slide ceramic weights over chemical inlet tubing to keep foot valves submerged in chemical, drop foot valve ends into
chemical container s. Attac h op en end of tub ing to pr op or tioner inlet b ar b s. ( Tub ing may be cut to any convenient length.
Soften end in hot water for easy attachment).
3. OPERATION
WARNING: USE CARE WHEN HAND LING HAZARDOUS CHEMICALS
Turn on water. Chemical siphoning will begin as soon as the outlet tubing fills with water.
Injection Rates For
Viscosities Shown
Meteri ng Tip Color
cps 75 cps 200 cps
Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio
Clear 0.30 430-1 0.22 592-1 0.13 864-1
Purple 0.48 265-1 0.32 406-1 0.24 524-1
Yellow 1.28 100-1 0.82 157-1 0.6 212-1
Green 1.67 77-1 1.29 99-1 1 128-1
Pink 2.36 54-1 1.65 77-1 1.25 103-1
Turquoise 3.76 34-1 2.55 50-1 1.85 69-1
Black 4.47 29-1 3.03 42-1 2.12 60-1
Gray 5.53 23-1 3.67 35-1 2.58 50-1
Red 7.00 18-1 4.79 27-1 2.79 46-1
Blue 8.78 15-1 5.39 24-1 3.06 42-1
Brown 10.95 12-1 6.49 20-1 3.35 38-1
White 14.19 9-1 7.08 18-1 3.46 37-1
Orange 17.58 7-1 7.91 16-1 3.71 35-1
Light Blue 21.75 6-1 8.66 15-1 3.9 33-1
Tan 27.98 5-1 9.15 14-1 4.11 31-1
No Tip 33.15 4-1 10.54 12-1 4.52 28-1
Table 1: 4 GPM flow rate, 3/8” barb and tubing
Note: 1 cps (centipoise ) is equal to the viscosity of wat er, 75 cps i s approximately equal to the viscosit y of 10 wei ght motor
oil, and 200 cps is approximately equal to t he viscosity of most dishwashing detergents
Rev A 7/99 Form I-689
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Page 2
INSTALLATION INSTRUCTIONS
DEMA MODEL 163-2DF-2
DUAL FEED PROPORTIONER
4. SERVICING
CAUTION: Turn off water supply before servicing.
A. Failure to inject chemical
a. Low water p ressure. At least 10 PSI is req uired.
b. Discharge tubing missing or not filling. Blend end or immerse in pail.
c. Deter gent passage clogged. Remove metering tip and soak proportioner in hot water to clean internal passages.
d. Foot valve clogged. Soak in hot water.
B. Injection continues after water is turned off. Discharge tubing is below drum level. Raise outlet tubing to stop
siphoning or re-arrange installation such that drum is below outlet tubing.
CAUTION: When servicing unit, be sure that replacement parts have been installed according to
drawing.
1
6
NO.
1
2
3
4
5
3
2
PART NO.
150-6 Garden Hose Rubber Washer
16-3 Vinyl Tube (1/2 ID X 3' Lg.)
61-107-1
100-16E
Vinyl Tube (3/ 8" ID X 8' Lg.)100-12L
Ceramic Weight
Foot Valve
DESCRIPTION
4
5
6
ACCESSORIES
6
61-9 METERING TIP (SPECIFY COLOR)
Rev A 7/99 Form I-689
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