Yoshitake DP-200 Series Manuale utente

■EPDT-266c■

MODEL DP-200 series

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.

The symbols used in this manual have the following meanings.

Warning This symbol indicates a potentially hazardous situation that, if not avoided,

could result in death or serious injury.

Caution 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

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

6.1 Piping example···················································· 8

6.2 Wiring method····················································· 9

6.3 Precaution for installation······································· 9

7. Operating Procedure ················································11

7.1 Precaution for operation ······································· 11

7.2 Test working ······················································12

8. Maintenance····························································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

9. Exploded Drawing·····················································17

Warranty Information

■EPDT-266c■

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

Nominal size 10-50A 15-50A

Structure Pilot-operated diaphragm type

Application Cold and Hot water, Air, N2gas, Co2gas (dry), Ar gas, Oil (20 cSt or less:

equivalent to kerosene and light oil)

Working pressure 0-1.0 MPa (Unusable under vacuum)

Min. differential pressure

(*1)

0 MPa

(0.1 MPa or more is required if the coil set sideways)

Allowable valve seat leakage No (by confirming pressure gauge visually)

Temperature range 5-60˚C (no freeze condition)

Ambient temperature 50˚C or less (no freeze condition)

Installation posture

(*1)

Vertical or horizontal installation

( within 90 degrees from upward position of the coil)

Material

Body Cast bronze

Cover

Diaphragm NBR

Connection JIS Rc screwed JIS 10K FF flanged

Available with rubber material FKM for the diaphragm and pilot valve.

Model numbers of the products complying with the Japanese Water Works Law are DP-200-N and

DP-200F-N.

*1: See Table 1.

Table 1 Min. differential pressures and installation postures

Horizontal piping Vertical piping

Min. Differential press.: 0.1 MPa

Min. Differential press.: 0 MPa

Coil

Coil set sideways

Coil set upward

Coil

Within 90˚ Within 90˚

±5˚

Min. Differential press.: 0.1 MPa

■EPDT-266c■

Performance and specifications of coil

Rated voltage AC 100 / 200 V selective type AC 110 / 220 V selective type

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

Insulation class Insulation class H

Protective structure Dust tight, Splash proof

Ingress protection code IP64 (JIS C0920)

Insulation resistance 50 MΩand more / 500 V megger

Withstand voltage test 1500 V/min

•Available with coil equipped with a terminal box (made of plastic) upon request.

Caution Please confirm that the indications on the product correspond with the specifications

of the ordered product model before use.

* If they are different, do not use the product and contact us.

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.

Warning

1. Please collate the attached nameplate with the specifications of the ordered model.

※If they are different, stop use and contact us

2. Make sure to confirm the specifications of constant water level valve before use.

※Constant water level valve or solenoid valve might not work properly depending on the

types of constant water level valve and solenoid valve or the piping conditions.

■EPDT-266c■

3. Dimensions and Weights

■Connection: JIS Rc screwed (Model: DP-200)

(mm)

Nominal

size d L H1H Weight

(kg)

10A Rc 3/8 70 14.5 114 1.1

15A Rc 1/2 70 14.5 114 1.1

20A Rc 3/4 80 17.5 121 1.3

25A Rc 1 95 21.0 128 1.7

32A Rc 1 1/4 110 26.0 150 2.5

40A Rc 1 1/2 120 29.5 157 3.1

50A Rc 2 140 36.5 172 5.0

■EPDT-266c■

■Connection: JIS 10K FF flanged (Model: DP-200F)

(mm)

Nominal

size d L H1H Weight

(kg)

15A 15 120 47.5 147 2.7

20A 20 130 50.0 153 3.3

25A 25 145 62.5 169 4.8

32A 32 160 67.5 192 6.6

40A 40 170 70.0 198 7.3

50A 50 195 77.5 213 10.0

■EPDT-266c■

Opening operation

Closing operation

4. Operation

（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]. The diaphragm [7] is then lifted up to open position by the inlet pressure.

（2）Closing operation (Power OFF)

When the power is turned OFF, the coil [1] excitation is canceled and the plunger [2] drops down by force

of the kick spring [3], to close the pilot valve [4]. The pressure at the upper part of the diaphragm [7] rises

due to the incoming inlet pressure from the bleed port [6] which is communicated with the inlet. With the

support of the kick spring [3], this makes the diaphragm [7] pushed down to closed position.

[1] Coil

[2] Plunger

[3] Kick spring

[4] Pilot

valve

[5] Pilot port

[6] Bleed port

[7] Diaphragm

■EPDT-266c■

5. Nominal Size Selection

5.1 Nominal size selection chart

For air

[How to use the chart]

When selecting the nominal size of a solenoid valve whose inlet pressure (P1), outlet pressure (P2) and air

(20˚C) flow rate (Q) are 0.5 MPa, 0.3 MPa and 600 m3/h (standard condition), respectively, first find

intersection point (A) of P1= 0.5 MPa and P2= 0.3 MPa. Trace down vertically from this intersection point

(A) to find intersection point (B) with Q = 600 m3/h (standard condition). Since this intersection point (B)

lies between nominal sizes 20 A and 25A, select the larger one, 25A.

Nominal

size

(A)

(B)

Q: Flow rate m3/h

(Standard condition) P2: Outlet pressure MPa

P2: Outlet pressure MPa

Q: Flow rate m3/h

(Standard condition)

Q: Flow rate m3/h

(Standard condition)

Inlet

pressure MPa

■EPDT-266c■

For water

[How to use the chart]

When selecting the nominal size of a solenoid valve whose inlet pressure (P1), outlet pressure (P2) 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 [∆P = 0.6-0.3 = 0.3 MPa] and V = 200 L/min. Since this

intersection point (A) lies between nominal sizes 20A and 25A, select the larger one, 25A.

ΔP: Differential pressure MPa

(A)

Nominal

size

V: Flow rate L/min

■EPDT-266c■

5.2 Nominal size selection

Cv value calculation formula

GV365.0

∆

<Air>

When

2> )PP(P

G)t273(

2940

21 +∆

When

2≤

P2550

G)t273(Q

Cv +

Cv: Cv value of each nominal size ∆P: P1– P2[MPa]

Q: Max. gas flow rate [m3/h (standard condition)]

G: Specific gravity (relative to air for gas,

V: Max. liquid flow rate [m3/h] or relative to water for liquid)

P1: Inlet pressure [MPa∙A]

P2: Outlet pressure [MPa∙A]

Cv value

Nominal size 10A 15A 20A 25A 32A 40A 50A

DP-200・200Ｆ3

(1.2)

(1.7)

7.5

(3.2)

(4.6)

(5.5)

(6.5)

(9.5)

●Cv values in parentheses are values when differential pressure is 0.01 MPa or less.

6. Installation

6.1 Piping example

* Differential pressure of at least 0.1 MPa is required to actuate the product when the coil is set sideways.

* Use the stop valves at the inlet and the outlet of the product at full open condition.

Pressure

gauge

Pressure

gauge

Outlet

Inlet

Stop

valve

Stop

valve

Bypass stop valve

Pressure gauge

Solenoid valve

DP-200

Strainer

■EPDT-266c■

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.

3. Use electric wires which have a core of 0.75 mm2or more.

4. Install a fuse (3A) to protect the electric circuit. In addition, if the product is used in a fuel supply system,

install a circuit protector of a rated capacity shown in the following.

•Rated voltage 100 / 110 V: 0.5 A circuit protector

•Rated voltage 200 / 220 V: 0.3 A circuit protector

5. When using a terminal box, do not rotate it to change its posture.

* Failure to follow this notice may cause disconnection or insulation failure.

6.3 Precaution for installation

Warning

Electric wiring work must be done by experienced professional.

1. If there is a risk of death, bodily injury or damage to property at the time of malfunction of the

product, be sure to install a suitable safety device that controls fluid flow interception/release or

sounds an alarm.

2. The product cannot be used as an emergency shutoff valve.

* The product is not designed as a safety valve such as an emergency shutoff valve. If the product

is applied to a system that needs safety measures, install other equipment besides the product to

ensure the safety.

3. The product is not explosion-proof. Do not use it in the area or ambience where explosive gases

accumulate.

* Using the product under the said conditions may cause fire.

4. Connect the cables only after confirming that no power is supplied.

* Failure to follow this notice may cause an electric shock.

5. Connect the cables according to the instructions after confirming the rated voltage.

* Erroneous cable connection may cause an electric shock or fire.

6. Do not supply electric power to the coil while it is detached from the valve.

* Failure to follow this notice may result in coil burnout or fire due to an overcurrent.

Power

Switch

Fuse

Circuit

Coil

コイル

Binding

: Lead wire

Binding

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