Yoshitake PD-1 User manual

12-1
Air Operated Valve
Control Valve
12

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
12-3
Air Operated Valve/Control Valve
Air Operated Valve/Control Valve
Step
0
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
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
12
Air Operated Valve/Control Valve
Step
1
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
12-5
Air Operated Valve/Control Valve
Air Operated Valve/Control Valve
Step
2
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
When
When
When
2> P1
2
PCv = Wk
138 ΔP(P1 + P2)
2P1
2
PCv = Wk
120P1
2> P1
2
P(273 + t) G
Cv = Q
2940 ΔP(P1 + P2)
2P1
2
P2560P1
Q
Cv = (273 + t)G
Cv = 0.365V G
ΔP
Iv = V
72780
Mcst
( )
G
ΔP 1
4
1
2
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
12-6
Air Operated Valve/Control Valve
Air Operated Valve/Control Valve
Step
3
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
Union
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
WRONG
O.K.
O.K.
O.K.
O.K.

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12-7
Air Operated Valve/Control Valve
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).
7.
Secure a space required for disassembly or removal of the product at the time of maintenance and inspection.
8. 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
12-8
Air Operated Valve/Control Valve
Air Operated Valve/Control Valve
Step
3
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
12-9
Air Operated Valve/Control Valve
Air Operated Valve
S
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
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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12
12-11
Air Operated Valve/Control Valve
Air Operated Valve
PD-3
䪻D
B
L
d
G
50º
(A)
(H)
1. Compact design and high durability.
2. Stainless steel cast body and metal actuator are suitable for wide
range of fluids, applications and ambient conditions.
3. Wide variety of actuator can be used for low pilot pressure.
Features
Specifications
*1 Max. working pressure is 0.9 MPa.
*2 Max. working pressure is 2.2 MPa.
*1 For steam: 0-1.5 MPa
*2 Available with normally open type.
· Please contact us for working pressure, pilot pressure or connections other than the above.
Dimensions (mm) and Weights (kg)
PD-3
Application Steam, Air, Cold and hot water, Oil, Other non-dangerous fluids (600 cSt or less)
Nominal size 15-50A
Working pressure
15A: 0-2.2 MPa *1 20A: 0-1.3 MPa
25A: 0-0.9 MPa 25A: 0-2.2 MPa *1
32A: 0-1.2 MPa 40A: 0-1.0 MPa
50A: 0-0.75 MPa
Pilot pressure
15A: 0.35-1.0 MPa 20A: 0.45-1.0 MPa
25A: 0.57-1.0 MPa 25A: 0.35-1.0 MPa
32A: 0.35-1.0 MPa 40A: 0.44-1.0 MPa
50A: 0.56-1.0 MPa
Temperature range -30 to 200˚C (no freeze condition)
Ambient temperature -15 to 60˚C
Material
Body Stainless steel
Valve disc PTFE
Bonnet Brass, Chrome-plated
Installation posture Any direction is available
Connection JIS Rc screwed
Operation Normally closed *2
Nominal size d L A H B D G Weight
15A Rc 1/2 65 135 130 34.5 62 G 1/8 1.1
20A Rc 3/4 75 140 135 34.5 62 G 1/8 1.2
25A *1 Rc 1 90 150 140 34.5 62 G 1/8 1.4
25A *2 Rc 1 90 190 185 55 96 G 1/4 3
32A Rc 1-1/4 110 205 200 55 96 G 1/4 3.3
40A Rc 1-1/2 120 210 205 55 96 G 1/4 3.6
50A Rc 2 150 225 225 55 96 G 1/4 4.2

www.yoshitake.jp 12-12
12
Air Operated Valve/Control Valve
Control Valve
Model CT-1
Nominal size 15-100A
Application Controlled fluid Cold and hot water, Air, Steam, Oil, Other non-dangerous fluids
Driving fluids Compressed air
Flange Connection JIS 10KRF
Max. working pressure 1.0 MPa
Working temperature -5 to 210˚C (no freezing condition)
Plug characteristics Equal percentage
Range ability 30:1
Sealing (plug and seat) Metal to metal
Seat leakage ANSI class IV
Actuator Single action
Valve action Reverse (fail to close)*1
Supply air pressure 0.35-0.4MPa*2
Ambient temperature -20 to 70˚C
Material
Body Cast carbon steel
Plug Stainless steel
Seat ring Stainless steel
Gasket SUS + GRAFOIL®
Grand
packing V-PTFE
Diaphragm EPDM
Accessories Electro-pneumatic positioner (4-20 mA DC)
Air regulator
CT-1
1. CT-1 offers the standard type electro-pneumatic positioner
and the air regulator as accessories and also offers several
options of positioner (E/P, Smart Positioner ) to be mounted
depending on request from end user.
2. Drive part is a compact and lightweight.
3. Spherical main valve offers great sealability and great
reduction of valve seat leakage (ANSI Class IV).
CT-1 is a pneumatic control valve. Its valve-opening is
accurately controlled by signals output from controller.
The single-seat globe valve body offers large capacity
and excellent controllability. The actuator is a multi-
spring, single-action type.
*1 Valve opens when the value of input signal increases.
· Available with ASME or EN flanged.
*2 Please apply air pressure between 0.4-1.0MPa for air regulator.
Features
Specifications

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12
12-13
Air Operated Valve/Control Valve
CT-1
Cv value
Dimensions (mm) and Weights (kg)
Positioner
Available with 2 types of positioners
Electro-pneumatic positioner (EP-1)
It is next generation positioner and micro processor
equipped providing with various functions such as auto-
calibration and the optimum control PID etc.
Smart positioner (EP-1S)
Nominal size 15A 20A 25A 32A 40A 50A 65A 80A 100A
Cv 6 9 14 25 33 50 85 106 175
· Malfunction preventive structure with high tolerance for
vibration.
· Quick and accurate response.
· Good efficiency with small air consumption.
· Easy zero/span adjustment.
· LCD monitor shows positioner’s condition.
· Excellent performance even under conditions of frequent
vibrations.
· With feedback analog signal output terminal.
· Good efficiency with small air consumption.
· Auto-calibration with easy operation.
Size L HA HB D Stroke Weight
15A 184 276 100 220 20 13
20A 184 276 100 220 20 13
25A 184 276 100 220 20 16
32A 222 320 111 270 25 22
40A 222 320 111 270 25 22
50A 254 320 124 270 25 28
65A 276 394 122 350 30 48
80A 298 394 162 350 30 61
100A 352 394 182 350 30 76

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12
Air Operated Valve/Control Valve
Air Operated Valve/Control Valve – Annex
Troubleshooting
Disassembly
Maintenance and inspection
PD-1, PD-2
PD-3
Air operated valve
1. Remove diaphragm cover on operation part and remove diaphragm.
2. Since valve and diaphragm plate are connected by bolt, pass a bar through hole for fixing valve, loosen bolt
by bar spanner, and remove plate. In this occasion, be careful that spring rebounds with strong force.
3. After removing diaphragm plate and spring plate, frame can be removed by removing lock nut and set screw
holding frame.
4. Next, remove upper cover of body (gland part Ass'y). Loosen gland nut in advance. Remove bottom cover.
5. After removing upper part, get out valve from bottom straightly. By above procedure, the product can be
disassembled from upper part in order. Also, assembly is the reverse order of disassembly.
Fluid does not flow (Valve
disc is kept closing and
does not open).
Trouble Cause Remedy
Fluid keeps
flowing and does
not stop (Valve
disc is kept
opening and
does not close).
Or, there is valve
leakage.
Fluid leaks from the
connection part of
packing case and body.
Fluid leaks
from the leak
detection port.
Pilot pressure
leaks from position
indicator part.
1. Make periodical inspection to check that diaphragm is not damaged.
2. Be careful for damage on contact surface of valve and valve seat. It becomes cause of fluid leakage. If
contact surface is damaged by dirt entry, make lapping with mixed sand.
3. Packing is consumable supply. If getting old, replace with new one.
4. Conduct inspection for spring buckling and stem bending, etc.
Pilot pressure is not supplied. ........................... Check air supply piping.
Pilot pressure is low. .........................................
Apply pilot pressure as specified in “Specifications”.
Sealing failure of outer lip seal. ......................... Replace the actuator assembly.
Leakage from stop valve on bypass piping. ......
Close stop valve. Or, in case that leakage still occurs
even if closing stop valve, replace stop valve.
Pilot pressure exists inside. ............................... Release pilot pressure from pilot port.
Foreign substance is stuck on the seat ............. Clean the seat part between valve disc and body.
part between valve disc and body.
There is damage on the seat part ..................... If there is damage on valve disc, replace the
actuator assembly. If there is damage on the
seat part of body, replace the product.
between valve disc and body.
Spring failure inside actuator. ............................ Replace the actuator set.
Leakage from gasket due to loose of ................
Tighten packing case by the specified tightening torque.
packing case.
Leakage from gasket due to deterioration. ....... Replace gasket.
Leakage due to deterioration or wear
of O ring or packing, etc. inside the
actuator set.
............ Replace the actuator set.
Leakage due to deterioration or wear
of O ring or packing, etc. inside the
actuator assembly.
............ Replace the actuator assembly.
XX
Warning
Be sure to install safety device for such as blocking or opening when failure or
malfunction of solenoid valve may violate human life, body, or property.
Please refer to the manual attached to the product for procedures for installation and operation.
CAUTION
Disassembly and maintenance, inspection Air operated valve

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12-15
12
Air Operated Valve/Control Valve
Air Operated Valve/Control Valve – Annex
PD-3
Warning before disassembly
(1) Be sure not to remove circlip L
* Failure to follow this notice makes inner spring
P
fly out and result in injury.
(2) To remove actuator set from body
1
, supply pilot pressure to pilot port, and rise valve disc
5
. Then loose and remove actuator set by grasping hexagonal part of packing case
2
. Also,
be sure not to stop pilot pressure during supply till the work finished.
* Actuator set cannot be removed when pilot pressure is not supplied to pilot port. Also, it is
very dangerous to stop pilot pressure during supply at work because actuator set files out
from body
1
and result in injury.
(3) Before disassembly, be sure to discharge the pressure inside of the product, piping and
equipment completely (after cooling down the product in case of high-temperature fluid).
Also do not touch it with bare hands directly till it is closed.
No. Parts
1 Body
2 Packing case
3 Gasket
5 Valve disc
20 Bonnet
22 Circlip
23 Piston
24 Exterior lip seal
26 Spring
27 Position Indicator
Warning
Position Indicator
Actuator assembly
Pilot port
Fig 1
leak detection port
Fig 2

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12
12-16
Air Operated Valve/Control Valve
Air Operated Valve/Control Valve – Annex
XX
CT-1
Trouble Cause Remedy
Warning
Be sure to install safety device for such as blocking or opening when failure or
malfunction of solenoid valve may violate human life, body, or property.
Please refer to the manual attached to the product for procedures for installation and operation.
CAUTION
Troubleshooting Control valve
The product
does not
operate.
Operation
is unstable
(Hunting occurs).
Leakage from
plug.
Leakage from
gland packing
and bonnet
gasket.
Pilot pressure or external signal is not supplied. ....
Check existence of pilot pressure (0.35 MPa or
more) by device such as pressure gauge. Check
existence of external signal by device such as tester.
Air supply piping is clogged or leaks. ............... In case of clogging, clean air supply piping. In
case of leakage, replace the piping.
Diaphragm bolt is loosened. ............................. Retighten diaphragm bolt.
Leakage occurs between lower diaphragm ...... Replace actuator.
case and diaphragm rod.
Failure occurs in accessory positioner or .......... Inspect or replace positioner or regulator.
regulator.
Failure occurs in body part or actuator. ............ Inspect or replace body part or actuator.
Sensitivity of positioner is not appropriate. ....... Replace positioner.
Abnormal signal is sent from controller. ............ Regulate controller and check signal system.
Pilot pressure is not stable. ............................... Check air supply piping and replace it with one of
larger nominal size.
Valve does not descend to the position of ........ Readjust zero point by controller.
full close.
There is damage on plug or seat ring. ............... Replace body part.
Gland nut or bonnet nut is loosened. ................ Retighten the nut. In case the leakage is still
found, replace packing.
Hardening of gland packing or bonnet gasket. .... Replace gland packing or bonnet gasket.
Recommended torque for actuator
To install actuator set on body, tighten so that appropriate
pressure can be applied on gasket 3, with torque wrench.
In this case, use tightening torque as follows.
Nominal Size Tightening torque
15A 60Nm
20A 90Nm
25A 120Nm
32A 150Nm
40A 190Nm
50A 230Nm