Yoshitake PD-1 Manuale utente

12-1

Air Operated Valve

Control Valve

12-2

Step 0 Type/Structure/Features

Please refer to this for structure and feature of Air

Operated Valve and Control Valve.

Step 1 Selection

Please refer to the ID chart to select the right products

depending on the intended of uses. Confirm the

additional details on the product page.

Step 2 Sizing

Please confirm the essential Cv value on the sizing

data P. -5. or Please confirm the essential sizes on the

nominal diameter selection chart of the product page.

Step 3 Attentions for usage

Please check some guidelines for optimal usage of the

products such as installation.

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12-3

Air Operated Valve/Control Valve

Step

Selection of Air Operated Valve and Control Valve

Opening and shutting

take place with the power

of air pressure

Control valve is a pneumatic,

hydraulic, or electrically powered

device to control operating

conditions such as flow, pressure,

temperature, and liquid level by

fully or partially opening or closing

in response to a process signal

Diaphragm motive pressure type

Control the opening and shutting of valve take place

with air pressure in addition to diaphragm

Valve that opens and closes the valve directly by

applying air pressure to the actuator

Various process

control by a

combination of

controller

Control on/off of the

fluid line for explosion

proof area that cannot

use electricity

What is Air Operated Valve?

What is Control Valve?

Application

Best Selection Chart (Except control valve)

This chart include solenoid valve (DD series) and motor valve (MD series) of block 11 other than air operated valve.

Requirement 1st recommendation 2nd recommendation

High-speed response Steam DP-100100F DP-10

Cold and hot water DP-200 Series PD Series

Water hammer prevention Steam MD-54

Cold and hot water DP-200 Series PD Series + Speed controller

No rubber material (Stainless steel, PTFE) DP-100100F MD Series

Easy maintenance DPDD Series

Manual operation MD Series

On/Off switch MD Series

Usable in explosion-proof area DP-34N PD Series

Less scale problems PD Series MD Series

Lightweight, compact and space-saving DD Series DP Series

www.yoshitake.jp 12-4

AIR OPERATED VALVES/CONTROL VALVES Control ID Charts

Air Operated Valve/Control Valve

Step

Model Type Fluid Material

Working

Press.

(MPa)

Max.

Temp.

(˚C)

Connection

Size Feature Page

PD-1

Diaphragm

type

Steam,

Air,

Water, Oil

CAC406

0-1.0 180˚C

JIS Rc 15-25A · Screwed type -9

PD-2 FC200

JIS 10KFF

15-50A · Flanged type -9

PD-3 Piston

type

Steam,

Air,

Water, Oil

Equivalent

to SCS14A

0-2.2 *1 200˚C JIS Rc 15-50A · Screwed type -11

Model Type Fluid Material

Working

Press.

(MPa)

Max.

Temp.

(°C)

Connection

Size Feature Page

CT-1 2 ways

valve

Steam, Air,

Cold and

hot water,

Oil

SCPH2 0-1.0 210˚C

JIS 10KRF

15-100A · Diaphragm motive

pressure type -12

* Max. pressure depends on size. Please refer to P. -11 for details.

* Please contact us for fluid and connections except those mentioned above.

Air Operated Valve ID-Charts

Control valve ID-Charts

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12-5

Air Operated Valve/Control Valve

Step

Nominal Size Selection for Air Operated Valve and Control Valve

Calculation formula for Cv value

Cv value table

Formula for correction of viscosity

(1) For steam

(2) For gas

(3) For liquid

W : Max. steam flow rate [kg/h]

P1 : Inlet pressure [MPa · A]

P2 : Outlet pressure [MPa · A]

ΔP : P1 - P2[MPa]

k : 1 + 0.0013 x {superheated steam temp. [°C]

- saturated steam temp. [°C] }

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

G : Specific gravity (relative to air for gas, or

relative to water for liquid)

t : Fluid temperature [°C]

V : Max. liquid flow rate [m3/h]

Cv : Cv value of each nominal size

Iv : Viscosity index

Mcst: Viscosity [cSt]

When

2> P1

PCv = Wk

138 ΔP(P1 + P2)

2P1

PCv = Wk

120P1

2> P1

P(273 + t) G

Cv = Q

2940 ΔP(P1 + P2)

2P1

P2560P1

Cv = (273 + t)G

Cv = 0.365V G

ΔP

Iv = V

72780

Mcst

(

)

ΔP 1

Iv: Viscosity index

Viscosity correction curve

K: Cv correction coefficient

Nominal size

Model

10A 15A 20A 25A 32A 40A 50A 65A 80A 100A

PD-1, 2 5 7 11 16 24 40

PD-3 4 9.2 17.4 27.8 40.6 63.8

CT-1 6 9 14 25 33 50 85 106 175

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12-6

Air Operated Valve/Control Valve

Step

Guidelines for Installing Air Operated Valve

Warning and caution for installation

Piping example

Speed

controller

Pressure

gauge Strainer

(60 mesh)

Stop

valve V1

PD-3 Air

operated valve

Stop

valve V2

Pressure

gauge

Pressure

gauge

Stop

valve V3

3/2 way solenoid

valve DD-37

PRV with filter

GD-37

Air motive pressure

Bypass

Union

1. Before connecting the product to piping, remove foreign substances and scales inside the piping. Note that

the seal material must not flow into the inside of the product.

* Contamination of foreign substances can cause valve seat leakage and malfunction.

2. When installation, check the direction of the product so that the fluid flowing and the arrow marked on the

product are in the same direction.

3. As shown in the above figure, it is recommended that stop valves, strainers, pressure gauges and bypass

line to be installed to the piping. For screwed valve, a union joint is recommended to install for easy

maintenance and inspection.

4. Make sure to install a strainer with the mesh size 80-100mesh at the inlet side of the product.

5. Avoid over-tightening of screw and excessive stress imposed from the piping in order to prevent malfunction

due to the distortion of the body.

6. Secure a space required for disassembly or removal of the product at the time of maintenance and

inspection.

<PD-1, 2>

· Installation posture

Install the air operated valve vertically (the air

pressure inlet port must be faced upward). Any direction is possible.

<PD-3>

WRONG

O.K.

WRONG

O.K.

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12-7

Air Operated Valve/Control Valve

Warning and caution for installation

1. Before connecting the product to piping, remove foreign substances and scales inside the piping. Note that

the seal material must not flow into the inside of the product.

* Contamination of foreign substances can cause valve seat leakage and malfunction.

2. When installation, check the direction of the product so that the fluid flowing and the arrow marked on the

product are in the same direction.

3. As shown in the above figure, it is recommended that stop valves, strainers, pressure gauges and

bypass line are installed to the piping. For screwed valve, a union joint is recommended to install for easy

maintenance and inspection.

4. Make sure to install a strainer with the mesh size 80-100 at the inlet side of the product.

5. Avoid over-tightening of screw and excessive stress imposed from the piping in order to prevent malfunction

due to the distortion of the body.

6. Recommend the upright installing position for the control valve (top drive unit).

Secure a space required for disassembly or removal of the product at the time of maintenance and inspection.

Control Valve is not explosion-proof. Do not use in the area or ambience where explosive gasses accumulate.

9. When using at the outdoor, set eaves to avoid direct rain.

Piping example

DC: 4-20 mA

Input Signal

Storage tank

Sensor

Pressure

gauge

Stop valve

CT-1 Control valve

Strainer

Bypass

Stop valve

Pressure

gauge

Stop valve

[For temperature control]

Standard opening signal and valve opening, flow rate, temperature relationship.

·Installation posture

Recommend the upright installing position

for the control valve (top drive unit).

Driving part

Signals (DC)

20 mA Fully open

(100%)

Steam amount:

Maximum

Temperature:

Maximum

Increase

signal Open Steam amount:

Increase Temperature:

Slow increase

4 mA Fully close

(0%) Steam amount:

Flow rate 0 Temperature:

Stable

Valve operation (valve opening)

Condition of fluid

Condition of fluid inside of tank

Controller

Guidelines for Installing Control Valve

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12-8

Air Operated Valve/Control Valve

Step

Other usage examples

Signals (DC)

20 mA Fully open

(100%) Flow rate:

Maximum

Increase

signal Open Flow rate:

Increase

4 mA Fully close

(0%) Flow rate:

Minimum

Valve operation (valve opening)

Condition of fluid

Signals (DC)

20 mA Fully open

(100%) Pressure:

Minimum

Increase

signal Open Pressure:

Decrease

4 mA Fully close

(0%) Pressure:

Maximum

Valve operation (valve opening)

Condition of fluid

Signals (DC)

20 mA Fully open

(100%)

Water level:

Quick increase

Increase

signal Open Water level:

Slow increase

4 mA Fully close

(0%) Water level:

Stable

Valve operation (valve opening)

Condition of fluid

Controller

Flow rate sensor

CT-1

Control valve

DC: 4-20 mA

Pressure gauge

[For flow rate control]

Input Signal

DC: 4-20 mA

CT-1

Control valve

Pressure sensor

Controller

Pressure gauge

[For pressure control]

Input Signal

Controller

Input SignalDC: 4-20 mA

Water sensor

CT-1

Control valve

Tank

Pressure gauge

[For water level control]

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12-9

Air Operated Valve/Control Valve

Air Operated Valve

PD-1

PD-2

Air pressure

3 way

solenoid valve

1. Usable for air, water, oil and steam.

2. No chattering due to closing action against the

flow direction of fluid.

3. Excellent durability of stainless steel valve seat.

4. Excellent durability of synthetic rubber diaphragm.

Features

Specifications

PD-1,2

Model PD-1 PD-2

Application Steam, Air, Cold and hot water, Other non-dangerous fluids

Working pressure 0-1.0 MPa

Max.temperature 180°C

Operation Air-to-open

Pilot pressure 0.2-0.25 MPa

Material

Body Bronze Cast iron

Valve Stainless steel

Valve seat Stainless steel

Connection JIS Rc screwed JIS 10K FF flanged

· Available with air-to-close operation type.

* For air operated pressure reducing valve, please refer to the block P. -10 (GD-37UN standard unit for

operation or GD-37N pressure reducing valve).

For 3 way solenoid valve, please refer to the block P. -11 (DD-37 3way solenoid valve).

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12-10

Air Operated Valve/Control Valve

PD-1, 2

Structure is a little different depending on size.

Dimensions (mm) and Weights (kg)

·PD-1

·PD-2

Nominal size d L H H1Cv value Weight

15A Rc 1/2 90 210 50 5 4

20A Rc 3/4 100 221 56 7 4.4

25A Rc 1 110 221 56 11 4.7

Nominal size

LHH

1φA

Cv value

Weight

15A 120 210 50 140 5 5.9

20A 130 221 56 140 7 6.6

25A 140 221 56 140 11 8.1

32A 180 412 100 256 16 28.5

40A 180 412 100 256 24 29.0

50A 180 422 105 256 40 30.0

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