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DEMA BLEND SAFE
MODELS: 662-2GAP, 662-3GAP & 662-4GAP-4
INSTALLATION INSTRUCTIONS
Blend Safe II Dispensing System is a modular, locking dispensing system that allows user to dispense chemicals safely, control
dispenser inventory and has the flexibility in the field to meet changing requirements at different accounts.
1. PARTS CHECKLIST
A. Blend Safe Assembly B. ¼” ID x 28” Long Vinyl Supply Tubing and Foot Valve
C. Ceramic Weight D. Hose Hanger Assembly
E. Drip Tray (1 GPM) F. Screw and Anchor Kit G. Label Card
H. Metering Tip Kit I. Cabinet Lock Key Set J. Blend Safe Mounting Template (I-792-2)
*Quantity varies depending on the model of the Blend Safe.
2. INSTALLATION: Note: All installations must conform to local plumbing codes and use approved backflow preventers.
Pressure indicating tee is to be installed with existing faucets according to local plumbing codes in the state of Wisconsin and
any other state that requires the use of a pressure indicating tee. WARNING: Water supply should not exceed 125 psi and
water temperature must not exceed 150°F.
A. MOUNTING AND WATER SUPPLY: Use mounting template enclosed to locate the mounting screw positions. Drill all of the
holes into the drywall using a 1/4” diameter bit for use with the included #10 screw and anchor set. (If mounting the Blend Safe to
wood and you do not plan to use the included anchors, drill 1/8” diameter holes.) Insert the anchors into drilled holes and hammer
them into the wall until they are flush with face of wall. Assemble all of the #10 screws with a Phillips screwdriver into the
anchors so the screw heads are sticking out of the wall approximately ½”. Mount the Blend Safe by inserting the screw heads
through the keyhole slots in the base and tighten the screws. The water inlet is equipped with a female garden hose fitting (with
strainer washer) for attaching a water supply hose. The water inlet may be removed to permit direct connection to a 3/8 in. NPT
pipe. The unit is designed so water can be supplied to either side by interchanging the pipe plug with the water inlet. Note: Apply
pipe dope, hand-tighten, and then turn 1-1/2 times with a wrench. DO NOT OVER TIGHTEN. WARNING: Do not use
Teflon® tape to seal internal plastic threads as the extra thickness of the tape may cause the plastic to crack. Use a non-welding
liquid sealant instead. The push button valves in the top of each station are connected using a hose barb and reinforced tubing.
The bottoms of each station are connected to each other using box clips. Additional single-station units can be attached using
DEMA kit #66-129. Kit #66-130 is used for attaching dual-station units to each other.
B. PRESSURE INDICATING TEE INSTALLATION: Screw female quick disconnect to faucet and attach pressure indicating tee
to female quick disconnect. Attach female end of reinforced hose to male threads of tee, then attach the male end to the fem ale
garden hose fitting at the water inlet of the Blend Safe (See Figure 3).
3. CHEMICAL INJECTION ADJUSTMENT: Warning: use care when handling hazardous chemicals. Chemical feed rates are
controlled by metering tips screwed into the proportioner barb. Select a tip using Table 1 or 2 as a guide.
1 cps (centipoise) is equal to the viscosity of water
75 cps is approximately equal to the viscosity of 10 weight motor oil
200 cps is approximately equal to the viscosity of most dishwashing detergents
TABLE 1 - 1 GPM FLOW RATE PROPORTIONER, 1/4” I.D. TUBING
Metering Tip Color
Tan 1.03 125-1 0.76 168-1 0.38 333-1
Orange 1.24 103-1 0.98 130-1 0.53 241-1
Turquoise 1.43 89-1 1.07 119-1 0.61 211-1
Pink 2.47 52-1 1.58 81-1 0.92 139-1
Light Blue* 3.05 42-1 2.1 61-1 1.06 121-1
Brown 3.48 37-1 2.31 55-1 1.15 111-1
Red 4.38 29-1 2.83 45-1 1.23 104-1
White 5.33 24-1 3.1 42-1 1.37 93-1
Green 6.38 20-1 3.63 35-1 1.4 91-1
Blue 6.77 19-1 3.78 34-1 1.45 88-1
Yellow 9.90 13-1 5.1 25-1 1.48 86-1
Black 15.00 9-1 6.54 20-1 1.53 84-1
Purple 24.94 5-1 7.28 18-1 1.57 82-1
Gray 35.94 4-1 8.5 15-1 1.64 78-1
No Tip 73.21 2-1 9.35 14-1 1.87 69-1
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Rev. E-37244 9/19/11
1 cps 75 cps 200 cps
Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio
TABLE 2 - 4 GPM FLOW RATE PROPORTIONER, 1/4” I.D. TUBING
Injection Rates For Viscosities Shown
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DEMA BLEND SAFE
MODELS: 662-2GAP, 662-3GAP & 662-4GAP-4
INSTALLATION INSTRUCTIONS
Metering Tip Color
Tan 0.33 387-1 0.26 500-1 0.12 1090-1
Orange 0.42 307-1 0.32 430-1 0.17 735-1
Turquoise 0.51 251-1 0.34 382-1 0.19 676-1
Pink 0.78 165-1 0.56 230-1 0.3 422-1
Light Blue* 0.87 147-1 0.67 192-1 0.33 391-1
Brown 0.99 129-1 0.74 174-1 0.37 345-1
Red 1.37 93-1 0.91 141-1 0.44 289-1
White 1.52 84-1 1.04 123-1 0.48 264-1
Green 1.72 74-1 1.22 105-1 0.52 244-1
Blue 2.13 60-1 1.27 101-1 0.54 239-1
Yellow 3.05 42-1 1.71 75-1 0.56 229-1
Black 4.50 28-1 1.96 65-1 0.57 224-1
Purple 7.75 17-1 2.4 53-1 0.59 217-1
Gray 9.86 13-1 2.54 50-1 0.63 204-1
No Tip 19.63 7-1 3.16 40-1 0.67 190-1
NOTE: *Metering tip color was formerly clear. All induction rates are base on a water pressure of 40 psi.
Leaner dilutions can be achieved by ordering DEMA ultra lean tip kit 100-15KU or capillary tip 44-61P.
C. CHEMICAL SUPPLY:
by pushing tubing over the barb located on the proportioner (Refer to Figure 1). Place the chemical container inside the case.
Run tube down back of Blend Safe through the holes in the back of the Blend Safe and insert the foot valve end of the tubing
into the chemical container. Repeat for each chemical. Peel-off gummed labels are provided for labeling chemicals.
D. DRIP TRAY:
tray down into place. Two-sided tape or Velcro (not included) may be used to secure drip tray to door. Attach tubing hanger
to end of tubing, to hang up when not in use (For 4 GPM only).
E. OUTLET TUBING:
hole located at the bottom of the case. Attach tubing hanger to end of tubing, to hang up when not in u se. Do not force outlet
tubing onto the larger barbs on the proportioner.
1 cps 75 cps 200 cps
Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio
Remove Blend Safe cover. Slip a ceramic weight over the chemical supply tube. Install the tubing
(1 GPM ONLY) The Drip Tray is installed inserting the tabs in back of drip tray through slots in door. Push
Attach one end of the ½” ID tubing to the proportioner outlet barb and run the other end through the
4. OPERATION
The Blend Safe is now ready for use. Depressing a push button opens the valve allowing water to flow through the chemical
proportioner that mixes a chemical water solution at the desired rate. The buttons are spring loaded to prevent accidental overflow
if unattended, but may be converted to locking buttons by cutting off the tab at the notch (See Figure 2). Pushing the button and
turning it a 1/4 turn clockwise at the end of its travel allows the valve to lock on. This makes it unnecessary for the attendant to
hold the button while filling large containers. Turning the button in a counter-clockwise direction will release it, allowing the
valve to shut off.
5. SERVICING Caution: Turn off water supply before servicing.
A. Proportioner fails to draw chemical:
1. Pinch outlet tube to create back pressure, which will cause unit to prime. Then foot valve will keep the inlet tube primed.
2. Insufficient water supply pressure. 20 PSI is the minimum allowable.
B. Proportioner stops drawing chemical:
1. Inspect foot valve for dried chemical or dirt. Soak in hot water to clean.
2. Proportioner metering tip clogged with dried chemical. Remove tip and try injecting in hot water. If there is no suction,
remove proportioner and soak in hot water to clear interior passages.
3. Inspect proportioner to ensure that there are no mineral deposit build-ups on the nozzle. If so, soak proportioner
body in de-liming solution. (Remove all parts attached to proportioner before soaking in de-liming solution.)
Note: Use care when handling hazardous chemicals.
C. Proportioner continues to draw chemical after water valve closes:
Injection Rates For Viscosities Shown
Chemical supply is higher than bottom of discharge
I-792 Pg. 2 of 7
Rev. E-37244 9/19/11
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DEMA BLEND SAFE
MODELS: 662-2GAP, 662-3GAP & 662-4GAP-4
INSTALLATION INSTRUCTIONS
tube creating a natural siphon. Lower the supply vessel or hang up outlet tube after use.
D. Valve Malfunction:
and released, indicating that the magnet is activating the plunger properly. Rem ove cover. To inspect internal parts, un screw
magnet housing and carefully pull off the enclosing tube so as not to drop the plunger, kick-off spring, and spacer. Check for
dirt or damage impending plunger and kick-off spring movement. Inspect the diaphragm, making sure the two small pin holes
(bleed hole) in the diaphragm convolution are clear to allow the valve to close.
Caution: When servicing unit, be sure that replacement parts have been installed according to the drawing.
Check that the button moves freely in & out and that a "click" can be heard when the button is pushed
PRESSURE INDICATING TEE INSTALLATION
OUTLET
TUBING
PRESSURE
INDICATING
TEE
BLEND CENTER
WATER INLET HOSE
WATER INLET HOSE
DETAIL OF PRESSURE
I-792 Pg. 3 of 7
Rev. E-37244 9/19/11
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DEMA BLEND SAFE
MODELS: 662-2GAP, 662-3GAP & 662-4GAP-4
INSTALLATION INSTRUCTIONS
Inlet Hose
Adapter
Thumb
Screw
Push Button
Actuator
Action Gap
Proportioner
Metering Tip
Chemical Supply
Tube
Outlet Tube
Cabinet Lock
with Keys
Chemical Container
Ceramic Weight
Foot Valve
Removable
Drip
Tray
Box Clip
(3) Places
Push Button
Utility Knife
FIGURE 2
FIGURE 1
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Rev. E-37244 9/19/11
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DEMA BLEND SAFE
MODELS: 662-2GAP, 662-3GAP & 662-4GAP-4
INSTALLATION INSTRUCTIONS
12
14
15
See page 8 for
breakdown
16
17
See page 8 for
breakdown
18
21
(6" Long Tubing)
22
(6' Long Tubing)
13
(SPECIFY COLOR)
26
19
20
27
23
24
25
(SPECIFY COLOR)
1
2
3
4
5
7
8
6
9
10
11
28
29
30
NO. PART NO. DESCRIPTION
1 66-139 Magnet Housing (Specify Color)
2 66-140 Push Button (Specify Color)
3 63-35 Magnet
4 63-36 Spring
5 41-7-25 Enclosing Tube
6 63-87 Valve Repair Kit
7 63-37 Spacer
8 41-1-8 Kickoff Spring
9 63-38 Plunger
10 41-15-10 Diaphragm
11 63-39 Valve Body
12 100-38 Strainer Washer
13 66-156 Water Inlet Assembly
14 66-153 Pipe Plug & O-Ring Assembly
15 16-30 Action Gap Assembly
NO. PART NO. DESCRIPTION
16 61-22-3 4 GPM (1/4” Barb) Proportioner (Gray)
17 61-99-2 1 GPM (1/4” Barb) Proportioner (Green)
18 63-78 O-Ring
19 63-79 Inlet Barb (1/4” Barb)
20 100-15K Metering Tip Kit – 14 Sizes
21 16-3-6 ½” ID x 6” Lg. Outlet Tube (1 GPM)
22 89-30-5 ½” ID x 6’ Lg. Hose Hanger Assy. (4
GPM)
23 100-12-16 ¼” ID x 28” Lg. Vinyl Supply Tube
24 61-107-2 Ceramic Weight
25 100-16E Foot Valve
26 66-64 Drip Tray
27 66-21 Cabinet Lock
28 67-4-1 Box Clip
29 66-63 Thumb Screw
ACCESSORIES
NO. PART NO. DESCRIPTION
30 68-6-QD2 Pressure Indicating Tee
I-792 Pg. 5 of 7
Rev. E-37244 9/19/11
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DEMA BLEND SAFE
MODELS: 662-2GAP, 662-3GAP & 662-4GAP-4
INSTALLATION INSTRUCTIONS
5
1
1
6
2
3
NO. PART NO. DESCRIPTION
1 150-6 Rubber Washer
2 61-36 Flow Disk
3 16-3-6 1/2” I.D. x 6” Lg. Vinyl Outlet Tube (1 GPM Only)
4 89-30-5 1/2” I.D. x 6’ Lg. Hose Hanger Assy. (4 GPM Only)
5 63-89-1 Rubber Washer (1/32” Thick)
6 16-30 Action Gap Assembly
Merchandise Returns
No Merchandise will be Returned for Credit Without DEMA’S Written Permission. Returned Merchandise Authorization Number is
Required in Advance of Return.
Product 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 that have a
4
I-792 Pg. 6 of 7
Rev. E-37244 9/19/11
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DEMA BLEND SAFE
MODELS: 662-2GAP, 662-3GAP & 662-4GAP-4
INSTALLATION INSTRUCTIONS
normal life shorter than one year or failure and damage caused by chemicals, corrosion, physical abuse, or
misapplication. Rubber and synthetic rubber parts such as “O”-rings, diaph ragms, PVC 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 is 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 must be granted in advance of returned
units for repair or replacement (See “Merchandise Returns” above).
I-792 Pg. 7 of 7
Rev. E-37244 9/19/11
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