Page 1
DEMA 161 FLUID MIXER
INSTALLATION INSTRUCTIONS
The Dema 161 Fluid Mixer has been designed to mix cutting and grinding fluids at the recommended dilution - straight from the
barrel without any additional pumps, air supplies or electric power.
1. PARTS:
A. Fluid Mixer and valve assembly.
B. Suction tube and foot valve assembly.
C. Discharge tube assembly.
D. Strainer washer.
E. 2 pcs. Hose clamps.
2. INSTALLATION:
The unit is supplied with a garden hose inlet;
run a garden hose from the water supply to the
inlet fitting. Attach the vinyl tubing with foo t
valve to the hose fitting under bung cap and
install the hose clamp. Drop tubing into drum
and screw bung cap onto drum. Attach end of
vinyl discharge tubing with priming ring to
proportioner outlet and install the hose clamp.
Note: Soaking end of vinyl tubing in hot water
will facilitate assembly (See Figure 1).
3. OPERATION:
Turn on the water supply; use the ball valve on
Fluid Mixer to turn water on and off. The
adjusting screw on the side of the Fluid Mixer
is used to set dilution ratios, backing the screw
out (counterclockwise) for stronger solutions
and turning it (clockwise) for weaker solutions.
See Table 1 for maximum dilution ratios.
Table 1 (Maximum Injection Rates)
FOOT VALVE
OUTLET TUBING
& HOOK
CLAMP
ADJUSTING
SCREW
2" BUNG CAP
CLAMP
CHEMICAL INLET
TUBE
Viscosity CPS 1 75 220 500 1500
Oz/Gal. 105 80 55 25 10
With an inlet water pressure of 40 PSI the discharge flow rate is 2.2GPM.
4. SERVICING:
I. Failure to draw-up chemical.
A. Low water pressure. At least 15 psi is required.
B. Priming ring not in place in outlet tubing. See Figure 1.
C. Chemical inlet blocked. Back off adjusting screw. Remove Fluid Mixer and examine foot valve. Flush Fluid Mixer
and foot valve in hot water.
D. Lime deposits in Fluid Mixer. Remove and soak in deliming solution (weak acid).
II. Injection continues after water is turned off.
A. Raise outlet tubing and hook onto drum to stop siphoning.
IMPORTANT: The correct connection, installation and use of these units with regard to any prevailing local rules, standards
or conditions is the responsibility of the user.
I-430 Pg. 1 of 3
Rev. C-32149
Page 2
DEMA 161 FLUID MIXER
INSTALLATION INSTRUCTIONS
RETURNS: NO MERCHANDISE MAY BE RETURNED FOR CREDIT WITHOUT DEMA’S WRITTEN PERMISSION.
RETURN MERCHANDISE AUTHORIZATION NUMBER REQUIRED IN ADVANCE OF RETURN.
WARRANTY: DEMA products are warranted against defective material and workmanship under normal use and service
for one year from the date of manufacture. This limited warranty does not apply to any products which
have a normal life shorter than one year or failure and damage caused by chemicals, corrosion, improper
voltage supply, physical abuse, or misapplication. Rubber and synthetic rubber parts such as “o”- rings,
diaphragms, squeeze tubing and gaskets are considered expendable and are not covered under warranty.
This warranty is extended only to the original buyer of DEMA products. If products are altered or repaired
without prior approval of DEMA, this warranty will be void.
Defective units or parts should be returned to the factory with transportation prepaid. If inspection shows
them to be defective, they will be repaired or replaced without charge, F.O.B. factory. DEMA assumes no
liability for damages. Return merchandise authorization number, to return units for repair or replacement,
must be granted in advance of return.
I-430 Pg. 2 of 3
Rev. C-32149
Page 3
DEMA 161 FLUID MIXER
INSTALLATION INSTRUCTIONS
1
2
3
7
4
5
8
6
16
16
18
19
9
17
20
10
21
15
16
OUTLET TUBING
ASSEMBLY
22
FOOT VALVE
ASSEMBLY
11
12
13
14
NO. QTY.
1 1 72-4 Injector Body Assy. 12 1 93-10 Rubber Ball (Buna-N)
2 1 72-5 Water Nozzle & O-Ring 13 1 73-2 Foot Valve Seat
3 1 72-9 1/4" NPT Close Nipple 14 1 72-1 Foot Valve Assembly
4 1 16-11 Ball Valve 15 1 72-15 Nut (Tubing Weight)
5 1 16-1
6 1 26-17 O-Ring 17 1 72-11 Suction Tubing
7 1 24-39 By-Pass Screw 18 1 72-7 Priming Ring
8 1 24-40 By-Pass Retainer 19 1 72-8 Retaining Spring
9 1 16-7-2
10 1 72-2 Foot Valve Body 21 1 16-4 Outlet Tubing Hanger
11 1 100-49 Spring 22 1
I-430 Pg. 3 of 3
Rev. C-32149
PART
NO.
DESCRIPTION NO. QTY.
Coupling & Strainer
Washer
2" Bung Cap w/Collar &
Retaining Ring
16 3 16-9 Hose Clamp
20 1 16-3 Outlet Tubing
PART
NO.
X23932
-1
DESCRIPTION
Outlet Tubing
Assembly
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