Yoshitake MD-53 Bedienungsanleitung

■EPDT-191a■

MODEL MD-53 and MD-54

TWO WAY MOTOR 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. Overview ·································································1

2. Specifications····························································1

2.1 Specifications and performance of actuator················2

2.2 Flow characteristics··············································3

3. Dimensions and Structure············································4

3.1 Dimensions and structure of cable connector··············6

4. Operation·································································7

5. ProceduresforInstallation, Operation andMaintenance···········8

5.1 Precaution for installation·······································8

5.2 Precaution for operation·········································9

5.3 Manual operation ···············································10

5.4 Precaution for maintenance··································10

5.5 Troubleshooting·················································11

Warranty Information

■EPDT-191a■

1. Overview

Compact size motor valve is often used as a part of automatic fluid control system in manufacturing process

which has been increasingly automated.

Model MD-53 and MD-54 two way motor valves are widely used in systems of sprinkler, water supply, solar

generation and air conditioning as well as in controllers for ON-OFF operation (for heating, cooling or

pressurizing) or remote operation.

2. Specifications

Model

MD-53

MD-54

Nominal size

15-50A

Application

Cold and hot water, Air

Air

Cold and

hot water

Steam

Working pressure

0-1.0 MPa

0-0.6 MPa

Fluid temperature

-15 to 80°C

Max. 120°C

Max. 100°C

Max. 160°C

Rated voltage

AC 100 / 110 V 50 / 60 Hz common

AC 200 / 220 V 50 / 60 Hz common

Power consumption

16 VA (for 15-40A),

19 VA (for 50A)

16 VA (for 15-32A),

19 VA (for 40A and 50A)

Operation

ON-OFF

Operation angle

90°

Opening-closing

time

At 50Hz

5.4 sec (for 15-25A)

5.4 sec (for 15A, 20A)

15.5 sec (for 32A, 40A)

15.5 sec (for 25A, 32A)

16 sec (for 50A)

16 sec (for 40A, 50A)

At 60Hz

4.5 sec (for 15-25A)

4.5 sec (for 15A, 20A)

13 sec (for 32A, 40A)

13 sec (for 25A, 32A)

13.5 sec (for 50A)

13.5 sec (for 40A, 50A)

Manual operation

Manually operable (Motor rotates by 90°)

Overcurrent protection

Built-in thermal protector

Opening-closing indicator

lamp circuit

Built-in

Protective structure

IP65 dust and water proof structure (JIS C 0920 IP65)

Valve shape

Reduced bore

Material

Body

Cast stainless steel

Ball

Stainless steel

Seat

Reinforced fluorine resin for high temperature

Connection

JIS Rc screwed

■EPDT-191a■

■Table of Cv value

•MD-53

Nominal size

15A

20A

25A

32A

40A

50A

Cv value

123

•MD-54

Nominal size

15A

20A

25A

32A

40A

50A

Cv value

120

2.1 Specifications and performance of actuator

Actuator

AM1-030

AM1-070

AM1-180

Model

MD-53

15-25A

32-40A

50A

MD-54

15A, 20A

25A, 32A

40A, 50A

Rated torque

3 N-m

7 N-m

18 N-m

Power consumption

16 VA

19 VA

Motor

Induction synchronous motor

Contact capacity of signal

AC 125 / 250 V 0.7 / 0.5A

Load time factor

20% 15 min.

Ambient temperature

-15 to 55°C (-20 to 65°C for actuator only)

Measure against dew condensation

Built-in space heater (1W)

Wire lead-in port

G 3/8 cable connector (Cabtire cable of Φ5.0-10.5)

Terminal block

Applicable to naked wire of 0.14-1.5 mm2(AWG26-14)

■EPDT-191a■

P2: Outlet pressure MPa

P1: Inlet pressure MPa

W: Flow rate kg/h

V: Flow rate L/min

ΔP: Differential pressure MPa

Q: Flow rate L/min (Standard condition)

2.2 Flow characteristics

■For saturated steam (in case of Cv value = 1)

■For air (in case of Cv value = 1)

■For water (in case of Cv value = 1)

NOTE:

Maximum working pressure is 0.6 MPa for

steam application.

⚫How to use the chart

Each chart shows flow characteristics

at Cv = 1.

To find a flow rate at each size,

multiply the value you find in the chart

by each Cv value shown in page 2.

The chart for air shows the flow

characteristics obtained at the fluid

temperature of 20°C.

Model: MD-53,

Nominal size: 20A,

Inlet pressure: 0.6 MPa

Outlet pressure: 0.5 MPa

The air flow rate at the conditions

above can be obtained by the

following formula.

1000 L/min (standard condition) [Find

the value by using the chart for air] x

16 (Cv value) = 16000 L/min

(standard condition)

■EPDT-191a■

3. Dimensions and Structure

■Model MD-53

No.

Part name

(mm)

Body

Nominal

size

Weight

(kg)

Ball

Seat

15A

Rc 1/2

121

1.3

Stem

20A

Rc 3/4

123

1.4

O-ring

25A

Rc 1

129

1.6

O-ring

32A

Rc 1 1/4

140

2.0

Connector

40A

Rc 1 1/2

146

2.3

Actuator

50A

Rc 2

109

194

3.4

Cable connector

Caution

1. The valve (ball) is preset to be open at factory before shipment.

O: Valve open

S: Valve closed

Flow direction is not limited.

■EPDT-191a■

■Model MD-54

No.

Part name

(mm)

Body

Nominal

size

Weight

(kg)

Ball

Seat

15A

Rc 1/2

151

1.4

Stem

20A

Rc 3/4

153

1.5

O-ring

25A

Rc 1

160

1.7

Bracket

32A

Rc 1 1/4

170

2.0

Connector

40A

Rc 1 1/2

218

2.9

Actuator

50A

Rc 2

109

224

3.5

Cable connector

Caution

1. The valve (ball) is preset to be open at factory before shipment.

2. Flow direction is limited. Check the direction of the product so that the fluid flow

and the arrow marked on the product are in the same direction.

Flow direction

O: Valve open

S: Valve closed

■EPDT-191a■

3.1 Dimensions and structure of cable connector

Lock nut Body Cap

(mm)

Cable outer diameter

Parallel pipe

thread

Screw

outer diameter

ΦH

Screw length

Mounting hole

diameter

Φ5.0-10.5

G 3/8

16.7

11.0

Φ17

(mm)

Dimensions of body and cap

Dimensions of lock nut

Gasket

thickness

Max. A

Max. B

35.0

25.5

26.0

24.0

26.0

24.0

5.0

1.5

ΦH

Max. A

Max. B

取付板

Mounting plate

■EPDT-191a■

4. Operation

Actuator operates with either normal or reverse rotation. The stem connected to the output shaft rolls the ball to

open or close the valve.

■Operational principle

Actuator

LS1, LS2:

Limit switch

Condenser

SH:

Space heater

Motor

Thermal protector

1. The valve closes as switched to [S].

The motor stops as LS-1 (limit switch for close operation) connection is turned OFF.

2. The valve opens as switched to [O].

The motor stops as LS-2 (limit switch for open operation) connection is turned OFF.

NOTE

•Use an opening-closing indicator lamp circuit suitable for the specifications of power supply.

•The built-in space heater requires no extra handling because it is installed in the circuit and

works automatically to prevent dew condensation inside the actuator.

•The label on the cable connector indicates the valve’s opening or closing conditions.

The valve is open when the label “O”is shown on the connector.

The valve is closed when the label “S”is shown on the connector.

■EPDT-191a■

5. Procedures for Installation, Operation and Maintenance

5.1 Precaution for installation

Warning

1. 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.

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

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

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

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

4. Keep the inside of the actuator away from water ingress.

* Failure to follow this notice may cause an electric shock, fire or malfunction due to short circuit.

Caution

1. Before connecting piping to the product, remove foreign substances and scale inside the piping.

* Failure to follow this notice may prevent the product from functioning properly.

2. To install the product that has a specified flow direction, confirm if the direction of fluid flow matches

with inlet and outlet sides of the product and install the product correctly.

* Setting the product in wrong directions prevents it from functioning properly.

3. Make sure to connect a strainer (80–100 mesh) to the inlet of the product.

* Failure to follow this notice may prevent the product from functioning properly.

4. Do not apply excessive load, torque or vibration to the product.

* Failure to follow this notice may result in drastically shortened service life.

5. If the product is used outdoors, place protective covers or guards above the wire connection in order

to avoid exposure to water.

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

6. If the product is used outdoors, place protective covers or guards above the product in order to avoid

exposure to water.

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

7. Do not overthread the pipe.

* Screwing in the overthreaded pipe may deform the product and cause malfunction of the product.

8. When installing the product, screw the pipe into the product, using a spanner set at the body end to

be connected as shown below.

* Do not screw in the pipe with holding the bracket of the actuator. Do not screw in the pipe using a

spanner set at the body end opposite from the pipe to be connected.

9. When installing the product, do not set a pipe wrench or apply excessive load on the product body.

To correct the installation posture of the product, do not apply any force to loosen the connecting

screw of the product. (Do not apply counterclockwise force to the connecting screw of the product.)

* Failure to follow this notice may prevent the product from functioning properly.

10. Do not dismount the actuator from the body while installing the product.

* Failure to follow this notice may result in part missing and malfunction.

■EPDT-191a■

11. Do not apply excessive torque when installing the product.

Use the torque specified below for screwing in the pipe to avoid the product malfunction.

◼Tightening torque (N∙m)

Nominal size

15A

20A

25A

32A

40A

50A

Tightening torque

25-35

40-50

50-60

60-80

75-85

90-110

12. If the surface temperature of the actuator cover exceeds 55°C due to radiant heat, equip the cover

with an insulating board appropriately.

13. Installation posture

・Install the product vertically or horizontally including intermediates, but not with the actuator

downward.

・Secure the space of at least 150 mm above the actuator for maintenance.

5.2 Precaution for operation

Warning

1. Do not touch the product with bare hands when the product is used for hot fluid.

* Failure to follow this notice may result in burns.

2. After checking that the appropriate power voltage is supplied, connect the wires according to wiring

diagram shown on the sticker on the actuator. Do not connect the wire to the switch signal terminal

unless it is necessary.

3. The product is equipped with a reliable screw terminal block.

Make a cut around the insulation of the wire by 5.5 mm from the edge, and connect it to the terminal.

4. Take measures against electric shock, such as using an earth cable.

For internal use of the actuator, use earth screws only.

5. After wiring completed, fix a rubber gasket to the actuator cover firmly to prevent water ingress.

6. While the product operates, follow the instructions below.

• Keep the product energized constantly because it has a built-in space heater for dew condensation

prevention.

• Do not place hands around the moving parts (connector) while the product operates.

7. Before operating, confirm that wiring and power voltage are correct. Then perform test working to

check if the product operates properly.

8. Confirm the product operating conditions.

•Check that the opening/closing frequency of the valve is within the duty factor of “20% 15 min.”

Using the product at a duty factor beyond specified may cause deterioration or burnout of the

product.

•The duty factor indicates the ratio of working time to total time of a valve which opens/closes intermittently.

“20% 15 min.”indicates that the product is capable of switching opening/closing operation

continuously or intermittently for the total of 3 min. (20% of 15 min.) during a 15-minute operation.

Frequency of switching opening/closing operation can be calculated from the duty factor.

•Do not apply reverse rotation signal to the product during its opening/closing operation.

*Failure to follow this notice shortens the service life of the product.

Installation posture

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