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DEMA 661DB-AG BLEND SAFE
INSTALLATION INSTRUCTIONS
1) PARTS:
A. Blend Safe. B. 1/4" ID x 19" Lg. Vinyl Supply Tubing, Foot Valve & Ceramic Weight.
C. Keys. D. #8 Pan Head Mounting Screws & Anchors.
E. Label Card. F. Drip Tray.
G. Metering Tip Kit. H. 6 ft. Outlet Tubing (Optional 4 gpm only).
2) INSTALLATION: (Refer to Figure 1)
Note: All installations must conform with local plumbing codes and use a ppr oved backflow preventers.
Pressure indic ating tee i s to be instal l with e xisting fauce ts accordi ng to local pl umbing codes in the state of Wisconsin
and any other state tha t requires the use of a pressure indicating tee.
A. MOUNTING AND WATER SUPPLY:
Hold the unit in position to locate the mounting screw positions at the top & bottom. Install the mounting screws at the top,
leaving appr oximately 1/ 8 " extension between the wall and screw head . Mount the Blend Safe by inserting the screw head s
through the key hole slots in the top and tightening the screws (See Figure 1). Now insert and tighten the screws in the
bottom.
The wat er inl et is eq ui p ped wi th a fema l e gar d en h ose fit ting ( wit h str ain er wash er ) for at ta chin g a wat er sup ply h ose. Th e
fitting may be removed to permit direct connection to a 3/8" NPT pipe. The unit is designed so water can be supplied to
either side by interchanging the pipe plug with the pipe and female hose fitting.
B. PRESSURE INDICATING TEE INST ALLATION:
Screw female quick disconnect to faucet and attach pressure indicating tee to female quick disconnect. Attach female end of
rein forced h ose to mal e threa ds of tee, t hen a ttach th e male en d to th e female g arden h ose fitt ing at the water inlet of the
Blend Center (See Figure 3). Water supply should not exceed 125 psi and water temperature must not exceed 160°F.
C. CHEMICAL INJECTION ADJUSTMENT: Warning: Use care when handli ng hazar dous 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. Note: 1 cps (centipoise) is equal to the viscosity of water, 75 cps is approximately equal to the viscosity of 10 w eight
motor oil, and 200 cps is approximately equal to the viscosity of most dish washing detergents.
D. CHEMICAL SUPPLY:
Install the chemical supply
tubing by pushing the tubing over the barb of the proportioner. The proportioner is accessible
through the case door (Refer to Figure 1). Push the tubing thru the slots in the cover. Place the chemical container inside
the case a n d in sert th e foot val ve a n d cer am ic wei gh t end of th e ch emi ca l su pply tu bin g in to th e ch em i cal con t ain er. Peel
off g ummed labels are provided for labeling chemical s.
TABLE 1 - (4 GPM FLOW RATE PROPORTIONER)
Injection Rates For Viscosities Sh own
Metering Tip
Color
Tan 0.30 427-1 0.20 640-1 0.15 853-1
Orange
Turquoise
Pink
Light Blue*
Brown
Red
White
Green
Blue
Yellow
Black
Purple
Gray
No Tip 16.25 8-1 3.00 43-1 1.20 107-1
Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio
0.40 320-1 0.30 427-1 0.25 512-1
0.60 213-1 0.40 320-1 0.30 427-1
0.80 160-1 0.50 256-1 0.40 320-1
1.00 128-1 0.70 183-1 0.45 284-1
1.20 107-1 0.80 160-1 0.50 256-1
1.50 85-1 0.90 142-1 0.60 213-1
1.85 69-1 1.10 116-1 0.70 183-1
2.00 64-1 1.25 102-1 0.80 160-1
2.50 51-1 1.50 85-1 0.82 156-1
4.00 32-1 1.85 69-1 0.90 142-1
5.50 23-1 2.00 64-1 0.94 136-1
8.80 15-1 2.40 53-1 0.96 133-1
11.65 11-1 2.50 51-1 1.00 128-1
1 cps 75 cps 200 cps
I-612 Pg. 1 of 4
Rev. D-36327 11/18/10
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TABLE 2 - (1 GPM FLOW RATE PROPORTIONER)
Injection Rates For Viscosities Sh own
Metering Tip
Color
Tan 1.25 102-1 0.90 142-1 0.60 213-1
Orange 1.70 75-1 1.20 107-1 0.80 160-1
Turquoise 2.15 60-1 1.55 83-1 1.10 116-1
Pink 3.00 43-1 2.00 64-1 1.50 85-1
Light Blue* 3.90 33-1 2.75 47-1 1.80 71-1
Brown 4.55 28-1 3.00 43-1 2.00 64-1
Red 5.80 22-1 3.60 36-1 2.30 56-1
White 7.00 18-1 4.45 29-1 2.70 47-1
Green 7.90 16-1 5.00 26-1 3.00 43-1
Blue 9.80 13-1 5.75 22-1 3.30 39-1
Yellow 14.80 9-1 7.35 17-1 3.55 36-1
Black 20.15 6-1 8.50 15-1 3.70 35-1
Purple 27.80 5-1 9.80 13-1 3.80 34-1
Gray 31.60 4-1 10.50 12-1 3.90 33-1
No Tip 35.70 3.6-1 11.80 11-1 4.50 28-1
Oz/Gal Ratio Oz/Gal Ratio Oz/Gal Ratio
1 cps 75 cps 200 cps
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.
E. DRIP TRAY:
The Drip Tray is installed by simply sliding the tray flange under the tabs on the bottom of the case. Lower the tray
allowing tray dimples to fall into the receptor holes.
F. OUTLET TUBING: (OPTIONAL 4 GPM ONLY)
Att ach on e en d of t h e 9/ 16 ID t ubin g t o th e pr op ort i oner out let bar b an d r un th e oth er end th r ough th e h ol e l ocat ed at t h e
bottom of the case.
3) OPERATION
The Blend Safe is now ready for use. Depressing a push button opens the valve allowing water to flow through the chemical
propor tioner that mixes a chemical wa ter soluti on at the desi red rat e. The button s are sprin g loaded t o 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 in while filling large containers. Turning the button in a counter clockwise direction will
release it, allowing the val ve to sh ut off.
4) SERVICING: Caution: Turn off water supply before servicing.
A. Proportioner fails to draw chemical:
Insufficient water supply pressure. 20 PSI is the minimum allowable pressure.
B. Proportioner stops drawing chemical:
1) Inspect foot valve f or dried ch emical or dirt. Soak in hot wa ter to clean.
2) Proportioner metering tip clogged with dried chemical. Remove tip and try injecting in hot water. If there is no
suction, remover proportioner and soak in hot water to clear interior passages.
C. Valve Malfunction:
Check that th e button moves fr eely in & out an d that a "click" can be h eard when th e button is push ed and r eleased,
indi cating that the magnet is activating the plun g er properly. Remove cover. To inspect internal parts, unscrew ma gnet
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 diaphrag m convolution are clear to allow the valve to cl ose.
Caution: When servicing unit, be sure that replacement parts have been installed according to drawing.
RETURNS: NO MERCHANDISE MAY BE RETURNED FOR CREDIT WITHOUT DEMA’S WRITTEN
PERMISSION. RETURN MERCHANDISE AUTHORIZATION NUMBER REQUIRED IN
ADVANCE OF RETURN.
WARRANTY: DEMA pr oducts ar e warran ted again st defectiv e mat erial an d workman ship under n ormal use an d service
for one year from the date of manufacture. This limited warranty does not apply to any products which
have a n ormal life shor ter than one yea r or fa ilure an d damage ca used by ch emica ls, corr osion , improper
voltage supply, physical abuse, or misapplication. Rubber and synthetic rubber parts such as “o”- rings,
I-612 Pg. 2 of 4
Rev. D-36327 11/18/10
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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 pr epaid. If inspection shows
them t o be de fect ive, th ey wil l be rep aired or r epla ced with out ch ar ge, F. O. B. fact or y. DEMA assum es n o
liability for damages. Return merchandise authorization number, to return units for repair or replacement,
must be granted in advance of return.
PRESSURE INDICATING TEE INSTALLATION
BLEND CENTER
WATER INLET HOSE
OUTLET TUBING
PRESSURE
INDICATING
TEE
CHEMICAL
INLET TUBING
FIGURE 3
WATER INLET H OSE
DETAIL OF PRESSURE
INDICATING TEE
22 15/16
REF
DEMA 661DB-AG BLEND SAFE
BUTTON ACTUATOR (2)
AIRGAP
PROPORTIONER
METERING TIP
OUTLET TUBING
FOR TRIGGER
SPRAYER
CABINET LOCK
CHEMICAL
CONTAINER
DRIP TRAY
7 3/4
REF
FIGUR E 1
7 1/4
REF
CHEMICAL SUPPLY
TUBES,FOOT VALVE
& CERAMIC WEIGHT
OUTLET TUBING
FOR USE-SOLUTION
INLET HOSE
ADAPTOR
STRAINER
WASHER
MOUNTING
HOL ES
PUSH BUTTON
UTILITY KNIFE
FIGURE 2
I-612 Pg. 3 of 4
Rev. D-36327 11/18/10
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DEMA 661DB-AG BLEND SAFE
PART NO.
66-31
63-47
93-44
66-139
(SPECIFY COLOR)
66-153
63-76
(4 GPM)
63-77
(1 GPM)
61-32BAG-161-22BAG-4
63-83
(6' LONG)
66-72
(1 GPM ONLY )
65-16
100-59
63-73
(4 GPM)
63-74-2
(1 GPM)
(1/4" BARB)
63-78
63-82
(1 GPM ONLY )
63-79
100-15-
(1/4" BARB)
100-11P
61-71
100-38
66-28
61-107-2
66-23-1
66-140
(SPECIFY COLOR)
63-35
63-36
41-7-25
63-37
41-1-8
63-87
63-39
63-38
41-15-10
66-21
68-6-QD2
41-1-8
41-15-10
41-7-25
61-22BAG-4
61-32BAG-1
61-71
61-107-2
63-35
63-36
63-37
63-38
63-39
63-47
63-73
63-74-2
63-76
63-77
63-78
63-79
KICK-OF F SPR ING
DIAPHRAGM
ENCLOSING TUBE
4 GPM P ROPO RTIONER
1 GPM P ROPO RTIONER
SNAP BUSHING
CER AMIC WE IGHT
MAGNET
SPRING
SPACER
PLUNGER
VALVE BODY
INLET ADAPTER (3/8" MPT X 3/8" FPT)
4GPM NOZZLE
1GPM NOZZLE
SCREEN (4 GPM)
SCREEN (1 GPM)
O-RING
INLET BARB (1/4" BARB)
DESCRIPTION
PART NO.
63-82
63-83
63-87
65-16
66-21
66-23-1
66-28
66-31
66-72
66-139
66-140
66-153
93-44
100-11P
100-15100-38
100-59
PART NO.
68-6-QD2
VINYL TUBE ( 3/16" ID X 7" LG) 1 GPM ONLY
VINYL TUBE (9/16" ID X 6' LONG)
633 VALVE REPAIR KIT
45° MALE X FEMALE 6H ADAPTER
CABINET LOCK
DRI P TRAY (1 GPM ST ATION ONLY )
VINYL TUBE (7/32" ID X 21" LG)
3/8" CLOSE NIPPLE
VINYL TUBE ( 9/16" ID X 4" LG) 1 GPM ONLY
MAGNET HOUSING (SPECIFY COLOR)
PUSH BUTTON (SPECIFY COLOR)
PIPE PLUG & O-RING
PIP E TO G. H. COUPLING
FOOT VALVE
METERING TIP (SPECIFY COLOR)
STRAINER WASHER
STRAINER WASHER
PRESSURE INDICATING TEE
DESCRIPTION
ACCESSORIES
DESCRIPTION
I-612 Pg. 4 of 4
Rev. D-36327 11/18/10
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