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Pilot-operated Solenoid Valve
Thank you very much for choosing the Yoshitake's product. To ensure the correct and safe use of the product,
please read this manual before use. This manual shall be kept with care for future references.
The symbols used in this manual have the following meanings.
Warning
Caution
1. Usage of the Product ·················································· 1
2. Specifications ···························································· 1
3. Dimensions and Weights ············································· 3
4. Operation ································································· 5
5. Nominal Size Selection ·············································· 6
5.1 Nominal size selection chart ··································· 6
5.2 Nominal size selection ··········································· 8
6. Installation ······························································ 8
7. Operating Procedure ················································ 11
8. Maintenance ···························································· 12
9. Exploded Drawing ····················································· 17
MODEL DP-200 series
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.
6.1 Piping example ···················································· 8
6.2 Wiring method ····················································· 9
6.3 Precaution for installation ······································· 9
7.1 Precaution for operation ······································· 11
7.2 Test working ······················································ 12
8.1 Precaution for maintenance ·································· 12
8.2 Daily and periodic inspections ······························· 13
8.3 Periodic replacement of parts ································ 14
8.4 Troubleshooting ·················································· 14
8.5 Disassembly ······················································ 15
8.6 Reassembly ······················································· 15
Table of Contents
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■EPDT-266c■
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Summary of Contents for Yoshitake DP-200 Series
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Page 1: Table Of Contents
Pilot-operated Solenoid Valve PRODUCT MANUAL Thank you very much for choosing the Yoshitake’s product. To ensure the correct and safe use of the product, please read this manual before use. This manual shall be kept with care for future references. -
Page 2: Usage Of The Product
1. Usage of the Product The DP-200 series, solenoid valves of pilot-operated type, are used for automatic on-off control of a fluid flow in combination with remote operated equipments or various control switches. 2. Specifications Model Normally closed DP-200 DP-200F... - Page 3 Performance and specifications of coil AC 100 / 200 V selective type AC 110 / 220 V selective type Rated voltage 50 / 60 Hz common Allowable fluctuation Rated voltage -5% to +10% Rated current 0.42/ 0.21 A 0.38 / 0.19 A Starting current 1.64 / 0.82 A 1.48 / 0.74 A...
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Page 4: Dimensions And Weights
3. Dimensions and Weights ■ Connection: JIS Rc screwed (Model: DP-200) (mm) Nominal Weight size (kg) Rc 3/8 14.5 Rc 1/2 14.5 Rc 3/4 17.5 Rc 1 21.0 Rc 1 1/4 26.0 Rc 1 1/2 29.5 Rc 2 36.5 ■EPDT-266c■... - Page 5 ■ Connection: JIS 10K FF flanged (Model: DP-200F) (mm) Nominal Weight size (kg) 47.5 50.0 62.5 67.5 70.0 77.5 10.0 ■EPDT-266c■...
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Page 6: Operation
4. Operation [1] Coil Opening operation Closing operation [2] Plunger [3] Kick spring [4] Pilot valve [5] Pilot port [6] Bleed port [7] Diaphragm （1）Opening operation (Power ON) When the power is turned ON, the coil [1] is excited and pulls up the plunger [2], to open the pilot valve [4]. Next, the pressure at the upper part of the diaphragm [7] drops since it flows to the outlet through the pilot port [5]. -
Page 7: Nominal Size Selection
5. Nominal Size Selection 5.1 Nominal size selection chart For air Nominal size [How to use the chart] When selecting the nominal size of a solenoid valve whose inlet pressure (P ), outlet pressure (P ) and air (20˚C) flow rate (Q) are 0.5 MPa, 0.3 MPa and 600 m /h (standard condition), respectively, first find intersection point (A) of P = 0.5 MPa and P... - Page 8 For water Nominal size ΔP: Differential pressure MPa [How to use the chart] When selecting the nominal size of a solenoid valve whose inlet pressure (P ), outlet pressure (P ) and flow rate (V) are 0.6 MPa, 0.3 MPa and 200 L/min, respectively, first find intersection point (A) of the differential pressure before and after the valve [ ∆...
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Page 9: Nominal Size Selection
5.2 Nominal size selection Cv value calculation formula <Liquid> ∆ <Air> > When 2940 ∆ ≤ When 2550 Cv: Cv value of each nominal size ∆ P: P – P [MPa] Q: Max. gas flow rate [m /h (standard condition)] G: Specific gravity (relative to air for gas, V: Max. -
Page 10: Wiring Method
6.2 Wiring method 1. Wiring method differs between the voltages, AC 100 / 110 V and 200 / 220 V. Bind the lead wires of the coil according to the instruction on the label attached to the coil. 2. In order to prevent disconnection or insulation failure, avoid unnecessarily pulling the lead wires or subjecting them to excessive load while wiring or use. - Page 11 Caution When installing the product with the coil set sideways, make sure that the differential pressure (the minimum differential pressure to operate the valve) between the inlet and the outlet is 0.1 MPa or more (see Table 1 on Page 1). * Failure to follow this notice may result in an abnormal operation.
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Page 12: Operating Procedure
11. Before piping, remove foreign substances and note that seal materials must not flow into the inside of the valve and piping. * Foreign substances may cause valve seat leakage and malfunction. 12. Deterioration of rubber parts may be accelerated by influence of pipe seal material. 13. -
Page 13: Test Working
Caution When the product is newly installed or left without being operated for a long time, perform test working before starting operation. Completely discharge the fluid inside of the product and line before leaving the product not operated for a long time. * Failure to follow this notice may cause malfunction due to rust inside of the product and lines, or result in damage due to freezing. -
Page 14: Daily And Periodic Inspections
* Failure to follow this notice may keep the product from functioning properly. 3. When repairing, do not use the parts other than the dedicated parts manufactured by Yoshitake. Do not modify the product. -
Page 15: Periodic Replacement Of Parts
8.3 Periodic replacement of parts Replace the following parts when the time below comes in order to maintain the optimal performance of the product. For replacement parts, replacement time differs according to frequency or condition of use. Standard times for replacement are shown in the table below. ... -
Page 16: Disassembly
Trouble Cause Remedy 1. Nut clamping the coil is 1. Retighten the nut with the specified Abnormal sound is torque 15N ・ m. loosened. heard. 2. Foreign substances exist on the 2. Disassemble the product and remove internal surface of the pipe or at foreign substances. - Page 17 Operation check of the diaphragm complete set Push the diaphragm and check that it moves smoothly.* If the diaphragm is not moved or lacks movement or is lumbering even being pushed, remove the diaphragm complete set from the cover complete set. If the kick spring drops off, the product does not operate normally.
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Page 18: Exploded Drawing
9. Exploded Drawing DP-200 (The DP-200F is flanged type.) The parts name shown in the rectangle boxes are available as consumable supply. ■ EPDT-266c ■... -
Page 19: 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...