Dover Hydro 38721 Schnellstart-Handbuch - Seite 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:

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

Key

Part No.

Description

238100

Strainer washer

10082830 Swivel collar (molded)

10082801 Swivel stem (molded)

10075950 O-ring (two per nipple)

10075925 Pipe plug

10080710 Button, grey (standard)

10080711 Button, sky blue

10080712 Button, red

10080713 Button, green

10080714 Button, light grey

10080715 Button, yellow

10080894 Cabinet

10020700 Selector valve grommet

10020900 Back up ring for grommet

AccuDose Select Parts Diagram:

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

180:1

350:1

13a

13b

Key

Part No.

Description

10075980 Valve parts kit

a. diaphragm, b. armature,

c. spring, d. valve bonnet

10079010 Spring

10079000 Magnet

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

10080730 Hose hook, dark grey (standard)

10080731 Hose hook, sky blue

10080732 Hose hook, red

10080733 Hose hook, green

10080734 Hose hook, light grey

10080735 Hose hook, yellow

* Hose hooks are for 3.5GPM discharge tubes

10080957 Selector replacement kit:

d.support clip e. Suction stub,

f. O-ring, g. selector valve assembly

690014

Metering tip (kit)

10068721 Barbed Y fitting

500870

Tubing, 1/4" x 7'

509900

Weight

20 10076301 Footvalve, viton (EPDM also

available order 10076302)

NOT SHOWN:

641750

Screws (cabinet sides)

Suction tube assembly:

attach open ends to barbs

on selector valve.

18a

18b

18c