Dover Hydro 38721 Manuale di avvio rapido - Pagina 2
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Metering Tip Selection:
The final concentration of the dispensed solution is
related to both the size of the metering tip opening
and the viscosity of the liquid being siphoned. For
water-thin products, the chart at left can be used as
a guideline. If product is noticeably thicker than
water, consult the Measurement of Concentration
Procedure below to achieve your desired water-to-
product ratio. Because dilution can vary with water
temperature and pressure, actual dilution achieved
can only be ascertained by using the Measurement
of Concentration Procedure. The clear, undrilled tip
is provided to permit drilling to size not listed should
you need a dilution ratio that falls between standard
tip sizes.
NOTE: A 1 GPM eductor is grey; a 4 GPM eductor
is yellow. Refer to parts diagram if unfamiliar with
names of system components.
Measurement of Concentration:
You can determine the dispensed water-to-product
ratio for any metering tip size and product viscosity.
All that is required is to operate the primed dispenser
for a minute or so and note two things: the amount
of dispensed solution, and the amount of concen-
trate used in preparation of the solution dispensed.The water-to-product ratio is then calculated as follows:
Dilution Ratio (X:1) where X = Amount of Mixed Solution — Amount of Concentrate Drawn
Dilution Ratio, then, equals X parts water to one part concentrate (X:1). If the test does not yield the desired ratio,
choose a different tip and repeat the test. Alternative methods to this test are 1) pH (using litmus paper), and 2)
titration. Contact your concentrate supplier for further information on these alternative methods and the materials
required to perform them.
AccuDose Select Parts Diagram List:
4
6
APPROXIMATE DILUTIONS
AT 40 PSI FOR WATER-THIN PRODUCTS (1.0 CP)
Ratio (per Eductor Flow)
Orifice
Std. Drill
Tip Color
Size
Number)
1 GPM
3.5 GPM
No Tip
.187
(3/16)
3:1
Grey
.128
(30)
3:1
Black
.098
(40)
3:1
Beige
.070
(50)
4:1
Red
.052
(55)
5:1
White
.043
(57)
7:1
Blue
.040
(60)
8:1
Tan
.035
(65)
10:1
Green
.028
(70)
16:1
Orange
.025
(72)
20:1
Brown
.023
(74)
24:1
Yellow
.020
(76)
32:1
Aqua
.018
(77)
38:1
Purple
.014
(79)
64:1
Pink
.010
(87)
128:1
Amount of Concentrate Drawn
2
1
3
Key
Part No.
Description
1
238100
Strainer washer
5
2
10082830 Swivel collar (molded)
3
10082801 Swivel stem (molded)
10075950 O-ring (two per nipple)
4
10075925 Pipe plug
5
10080710 Button, grey (standard)
10080711 Button, sky blue
7
10080712 Button, red
10080713 Button, green
10080714 Button, light grey
10080715 Button, yellow
6
10080894 Cabinet
7
10020700 Selector valve grommet
10020900 Back up ring for grommet
AccuDose Select Parts Diagram:
6.5:1
6.5:1
7:1
10:1
16:1
20:1
24:1
30:1
12a
45:1
12b
56:1
64:1
90:1
128:1
d
180:1
350:1
13a
13b
9
10
a
b
c
d
15
18
e
f
g
Key
Part No.
Description
9
10075980 Valve parts kit
a. diaphragm, b. armature,
c. spring, d. valve bonnet
10
10079010 Spring
11
10079000 Magnet
12
290
1 GPM eductor assembly
291
3.5 GPM eductor
13 a 10088822 1 GPM discharge tube assembly
b 90048495 3.5 GPM discharge tube assembly
14
10080730 Hose hook, dark grey (standard)
10080731 Hose hook, sky blue
10080732 Hose hook, red
10080733 Hose hook, green
14
10080734 Hose hook, light grey
10080735 Hose hook, yellow
* Hose hooks are for 3.5GPM discharge tubes
15
10080957 Selector replacement kit:
d.support clip e. Suction stub,
f. O-ring, g. selector valve assembly
16
690014
Metering tip (kit)
17
10068721 Barbed Y fitting
18
500870
Tubing, 1/4" x 7'
19
509900
Weight
20 10076301 Footvalve, viton (EPDM also
available order 10076302)
NOT SHOWN:
641750
Screws (cabinet sides)
11
Suction tube assembly:
attach open ends to barbs
on selector valve.
17
17
18a
18a
18b
17
18c
19
20