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Thank you very much for purchasing our solenoid valve. Please read this instruction manual thoroughly
before using the product, so that you may do so correctly and safely. Please carefully store this manual in a
handy place. The following safety symbols are used in this manual.
Warning
Caution
1. Usage of the Product ·················································· 1
2. Features ·································································· 1
3. Specifications ···························································· 1
4. Dimensions and Weight ·············································· 3
5. Operation ································································· 3
6. Nominal Size Selection ·············································· 4
6.1 Nominal size selection chart ··································· 4
6.2 Calculation formula for Cv value ······························ 6
7. Installation ······························································ 6
7.1 Precaution for installation ······································· 6
7.2 Piping example ···················································· 8
7.3 Wiring method ····················································· 8
8. Operating Procedure ················································· 9
8.1 Precaution for operating procedure ·························· 9
8.2 Test working ······················································· 9
9. Maintenance ····························································· 9
9.1 Precaution for maintenance ·································· 10
9.2 Daily and periodic inspections ······························· 10
9.3 Troubleshooting ·················································· 11
9.4 Disassembly and reassembly ································ 12
MODEL DD-2 · DD-3 series
REDMAN
PRODUCT MANUAL
This symbol indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
This symbol indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury or may result in only property damage.
Table of Contents
TM
DIRECT ACTING
SOLENOID VALVE
.
■EPDT-251b■
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Summary of Contents for Yoshitake REDMAN DD-2 Series
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Page 1: Table Of Contents
MODEL DD-2 · DD-3 series DIRECT ACTING REDMAN SOLENOID VALVE PRODUCT MANUAL Thank you very much for purchasing our solenoid valve. Please read this instruction manual thoroughly before using the product, so that you may do so correctly and safely. Please carefully store this manual in a handy place. -
Page 2: Usage Of The Product
1. Usage of the Product The DD-2 and DD-3 series compact designed direct-acting solenoid valve has stainless steel body and offers superior corrosion resistance. Because it can be applied to various fluids, it is widely used for water supply/drainage systems in a house, plant facilities and automatic controllers for industrial use, etc. 2. - Page 3 Table 1. Installation posture When using the solenoid valve to pilot piping of constant water level valve, select direct type or pilot type in accordance with the instruction from constant water level valve manufacturer. If there is no instruction from the manufacturer, we recommend selecting direct type DD-3-8N for the pilot piping below size 50A of constant water level valve, and selecting pilot type DP-200-N for the pilot piping above size 65A of constant water level valve.
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Page 4: Dimensions And Weight
4. Dimensions and Weight Ø Model ØD (mm) DD-2 DD-3 DD-2-8 DD-3-8 (Example structural drawing: DD-3) (mm) Nominal size Weight (kg) Rc 3/8 85.5 0.66 Rc 1/2 87.5 0.69 Rc 3/4 16.5 0.74 5. Operation (1) Opening operation When the coil is supplied with power, the plunger is pulled up and extends the spring upwardly, opening the valve. -
Page 5: Nominal Size Selection
6. Nominal Size Selection 6.1 Nominal size selection chart ■ For water (Cv = 1) ∆P: Pressure loss (MPa) First calculate pressure loss ∆P and then find flow rate V in the above chart. Secondly, multiply the flow rate V by Cv value for each model. [Example] Model: DD-3 (Cv value: 1.7) •... - Page 6 ■ For steam (Cv = 1) : Outlet pressure (MPa) ■ For air (Cv = 1) : Outlet pressure (MPa) First find the flow rate (W for steam, Q for air), the intersection of inlet pressure P and outlet pressure .
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Page 7: Calculation Formula For Cv Value
6.2 Calculation formula for Cv value <For liquid> ∆ <For steam> <For air> When > When > 2940 ∆ ∆ ≤ ≤ When When Cv = 2550 Cv: Cv value of each nominal size ∆P: P – P [MPa] W: Max. steam flow rate [kg/h] K: 1 + 0.0013 ×... - Page 8 Caution 1. Vertical or horizontal installation is possible including the intermediates between vertical and horizontal positions, however, do not install it upside-down. * Failure to do so may result in an abnormal operation. 2. Before connecting piping to the product, remove foreign substances, dirt, etc. inside of the piping by flushing. * Failure to do so may prevent the product from functioning correctly.
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Page 9: Piping Example
22. Avoid connection of dissimilar metal piping which will cause a galvanic potential difference because the product or the parts may be corroded. 23. Select the product considering conditions of use such as operation frequency and durability. 7.2 Piping example Bypass stop valve Pressure gauge Pressure... -
Page 10: Operating Procedure
8. Operating Procedure 8.1 Precaution for operating procedure Warning Do not touch the product with bare hands in case of high-temperature fluid. * Doing so may result in burns. * The coil becomes hot while it is continuously energized even in normal operation. Before leading fluid, make sure that there is no danger when the fluid flows to the end of piping. -
Page 11: Precaution For Maintenance
3. When replacing parts, make sure the replacement parts are supplied by Yoshitake. And do not make any alteration to the product. * Using any part supplied by other than Yoshitake or making any alteration may cause damage to the product or may result in injury or scalds due to blow-off or malfunction. -
Page 12: Troubleshooting
9.3 Troubleshooting Trouble Cause Remedy 1. Strainer installed at the inlet side 1. Clean the strainer. Valve does not open. of the product is clogged. (Fluid does not flow.) 2. Plunger a’ssy is stuck with 2. Disassemble the product and remove foreign substances in the piping. -
Page 13: Disassembly And Reassembly
9.4 Disassembly and reassembly (See “Exploded drawing” below.) Warning 1. Confirm that no power is supplied before disassembling. * Failure to do so may cause an electric shock. 2. Completely discharge the pressure inside of the product, line and equipment before disassembling or maintenance, and cool down the product till it can be touched with bare hands in the case of high-temperature fluid. -
Page 14: Warranty Information
( e.g. in case of corrosion due to outdoor use). Fire, flood, earthquake, thunder and other natural disasters. Consumable parts such as O-ring, gasket, diaphragm and etc. Yoshitake is not liable for any damage or loss caused by malfunction or defect of the product. PDD-046f...
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