Yoshitake TA-2 User manual

Model TA
Air Vent Valve
INSTRUCTION MANUAL
Thank you very much for choosing the Yoshitake’s
please read this manual before use.
This
The symbols used in this manual have the following meanings.
Warning
This symbol indicates a
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
1. Usage of the
P
2. Features
································
3. Specifications
4.
Dimensions and Weights
5. Operation
································
6. Maintenance
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6.1
Precaution
6
.2 Precaution for use
6.3
Troubleshooting
7. Disassembly
································
7.1
Precaution for maintenance
7.2
Disassembly
8. Exploded view
Warranty Information
Model TA
-2・
・・
・2C・
・・
・5
・
・・
・
Air Vent Valve
INSTRUCTION MANUAL
Thank you very much for choosing the Yoshitake’s
product. To ensure the correct and safe use of the product,
This
manual shall be kept with care
for future references
The symbols used in this manual have the following meanings.
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.
Table of Contents
P
roduct································
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································
··
and Performance ································
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Dimensions and Weights
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Precaution
s for operation ································
·······
.2 Precaution for use
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Troubleshooting
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Precaution for maintenance
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Disassembly
procedure································
·········
································
···························
Warranty Information
■ EPDT-198 ■
・
・・
・
5F
.
product. To ensure the correct and safe use of the product,
for future references
.
potentially hazardous situation that, if not avoided,
This symbol indicates a hazardous situation that, if not avoided, may result in
or may result in only property damage.
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1
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5
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5

Air vent valve is essential
for air conditioning system. Ingress of air into the piping system causes degrease of heat
efficiency
, noise generation or corrosion of devices, etc. Air ve
mechanism
and can greatly reduce time required for wa
the time of initial water supply mo
re quickly than conventional
1.
Equipped with a quick exhaust mechanism, air insid
time of
initial water supply, ensuring smooth water supply.
2.
Wide pressure range than that of conventional air vent valves and applicable to from low pressure to high
3.
Parts are easy to replace, maintain and inspect from outside even if the valve seat surface is
long period operation.
4. TA-2C has superior corrosion
resistance since inside and outside of its body are coated by Nylon 11.
5. Since the body of the TA-
5 and TA
3
.
Specifications
Model
Application
Working pressure
Operating pressure range
of quick exhaust valve
Maximum temperature
Material
Body
Cover
Valve
Floating
valve
Float
Connection
Body is electro deposition coat
ed for rust prevention
Maximum temperature for intermittent usage is 90
Insulation should be done when
temperature
is 40 ℃ or more (TA-2C).
Model
Application
Working pressure
Operating pressure
range of quick exhaust
valve
Maximum temperature
Material
Body
Cover
Valve
Floating
valve
Brass (Equipped with NBR disc)
Float
Connection
Caution
Please confirm that the indications on the product correspond with the specifications
of the ordered
* If they are different, please contact us without using the product.
1
1.
Usage of the Product
for air conditioning system. Ingress of air into the piping system causes degrease of heat
, noise generation or corrosion of devices, etc. Air ve
nt valves TA-
2, 2C, 5, 5F equip
and can greatly reduce time required for wa
ter supply since they can e
xhaust
re quickly than conventional
air vent valves.
2
.
Features
Equipped with a quick exhaust mechanism, air insid
e piping can be quickly
initial water supply, ensuring smooth water supply.
Wide pressure range than that of conventional air vent valves and applicable to from low pressure to high
Parts are easy to replace, maintain and inspect from outside even if the valve seat surface is
resistance since inside and outside of its body are coated by Nylon 11.
5 and TA
-
5F is made of bronze, these models are free from rusty water.
Specifications
and
Performance
TA-2
TA
Cold and hot water, Oil (specific gravity: 0.8 or more)
0.01 - 1.0 MPa
0.01 MPa or less
90 ℃
60
Ductile cast iron
Bronze
Brass
Brass (Equipped with NBR disc)
Stainless steel
JIS Rc screwed
ed for rust prevention
(TA-2).
Maximum temperature for intermittent usage is 90
℃ (TA-2C).
temperature
difference between the prod
uct and outside atmosphere
TA-5
TA
Cold and hot water, Oil (specific gravity: 0.8 or more)
0.01 - 1.0 MPa
0.01 MPa or less
90 ℃
120
Bronze
Bronze
Brass
Brass (Equipped with NBR disc)
Brass (Equipped with FKM
Stainless steel
JIS Rc screwed
Please confirm that the indications on the product correspond with the specifications
of the ordered
product model before use.
* If they are different, please contact us without using the product.
■ EPDT-198 ■
for air conditioning system. Ingress of air into the piping system causes degrease of heat
2, 2C, 5, 5F equip
quick exhaust
xhaust
much air inside piping at
e piping can be quickly
exhausted at the
Wide pressure range than that of conventional air vent valves and applicable to from low pressure to high
.
Parts are easy to replace, maintain and inspect from outside even if the valve seat surface is
damaged in
resistance since inside and outside of its body are coated by Nylon 11.
5F is made of bronze, these models are free from rusty water.
TA
-2C
Cold and hot water, Oil (specific gravity: 0.8 or more)
60
℃
uct and outside atmosphere
TA
-5F
Cold and hot water, Oil (specific gravity: 0.8 or more)
120
℃
Brass (Equipped with FKM
disc)
Please confirm that the indications on the product correspond with the specifications
* If they are different, please contact us without using the product.

2
■ EPDT-198 ■
■
■■
■ Exhaust capacity charts
4
.
Dimensions and Weights
Nominal
size d d
1
H C *Weight (kg)
15A Rc 1/2 Rc 3/8 153 114 3.18
20A Rc 3/4 Rc 3/8 153 114 3.18
25A Rc 1 Rc 3/8 157 114 3.22
32A Rc 1 1/4 Rc 3/8 157 114 3.22
Exhaust capacity
L/min
(Standard condition)
Pressure MPa
Exhaust capacity
L/min
(Standard condition)
Pressure MPa
Working range of quick
exhaust valve
Normal exhaust
hole
Quick
exhaust
hole
(mm)
*The weight is for TA
-
2
・
2C.

3
■ EPDT-198 ■
5
. Operation
(1) Before water flowing, the float [7] is in low position and the floating valve [2] is opened. 【 Fig. 4-1 】
(2) When water starts to flow into the valve, air inside piping is pushed by water and exhausted out through
quick exhaust hole. 【 Fig. 4-2 】
(3) The float [7] is pushed up by water flowing into the product, and the valve [3] connected with the float is
closed. 【 Fig. 4-3 】
(4) When air flows into the product, the float [7] is lowered immediately, and at the same time the valve [3] is
lowered, and therefore air is exhausted out through quick air vent hole. 【 Fig. 4-4 】
■
■■
■ Operation
■
■■
■ Structure
No. Parts name
1 Valve seat
2 Floating valve
3 Valve
4 Valve guide
5 Hanger
6 Cover
7 Float
8 Body
Air bubble
Air
【 Fig. 4-2 】
【 Fig. 4-1 】
【 Fig. 4-3 】 【 Fig. 4-4 】
Air
Before water flowing
During water flowing
Water flowing is completed
Air commingling
Normal exhaust hole
Quick exhaust hole

5.1 Precautions for operation
1.
Install the product perpendicular
*Failure to follow this notice
does not achieve
2. Before installing the
product, remove foreign substances and scale from the piping
* Failure to follow this notice may prevent the product from functioning properly
foreign substance and scale into the product
3. When installing the product
to piping, tighten
tighten it beyond necessity.
*Failure to follow this notice transforms the body and cause malfunction.
4. L
ead outlet side of the product to safety place in case water leaks.
*Failure to follow this notice may
6.2 Precaution for use
1.
Do not touch the product directly with bare hand in case of high temperature fluid
* Failure to follow this notice
may cause
6.3 Troubleshooting
Trouble
Air cannot be
exhausted.
1.
Stop valve at inlet side has been
closed.
2.
Piping pressure is above the
optimum level
Water outflows.
1.
Floating valve [2] is stuck by foreign
substance
2.
Floating valve [2] is damaged.
3.
Float [6] is damaged and loses the
specified function.
7.1 Warning for maintenance
Warning
Completely discharge the pressure inside of the product
disassembly
or maintenance
* Failure to
follow this notice may result in injury due to residual pressure.
1.
Install stop valve (cock or gate valve) at inlet side of the
product for maintenance and inspection.
2.
There is a possibility of leakage by scale inside piping.
Install the point of outlet
side so that back flow to drain
ditch cannot happen as shown in the right figure
4
6
.
Operating Procedure
Caution
Install the product perpendicular
ly on such a place where air likely gathers.
does not achieve
function of the product.
product, remove foreign substances and scale from the piping
* Failure to follow this notice may prevent the product from functioning properly
foreign substance and scale into the product
.
to piping, tighten
the hexagonal part of the body with wrench
*Failure to follow this notice transforms the body and cause malfunction.
ead outlet side of the product to safety place in case water leaks.
*Failure to follow this notice may
contaminate surroundings.
Warning
Do not touch the product directly with bare hand in case of high temperature fluid
may cause
burns.
Cause
Remedy
Stop valve at inlet side has been
1.
Open the stop valve fully.
Piping pressure is above the
optimum level
.
2.
Reduce
the piping pressure or replace
the product with the model for high
pressure.
Floating valve [2] is stuck by foreign
1.
Disassemble the product and clean
floating valve.
Floating valve [2] is damaged.
2.
Replace floating valve [2].
Float [6] is damaged and loses the
specified function.
3.
Replace float [7].
7
.
Disassembly
Completely discharge the pressure inside of the product
or maintenance
.
follow this notice may result in injury due to residual pressure.
To drain
ditch
Install stop valve (cock or gate valve) at inlet side of the
product for maintenance and inspection.
There is a possibility of leakage by scale inside piping.
side so that back flow to drain
ditch cannot happen as shown in the right figure
■ EPDT-198 ■
product, remove foreign substances and scale from the piping
.
* Failure to follow this notice may prevent the product from functioning properly
due to ingress of
the hexagonal part of the body with wrench
. Do not
Do not touch the product directly with bare hand in case of high temperature fluid
.
Remedy
Open the stop valve fully.
the piping pressure or replace
the product with the model for high
Disassemble the product and clean
Replace floating valve [2].
Replace float [7].
Completely discharge the pressure inside of the product
and piping before
follow this notice may result in injury due to residual pressure.
Stop valve

5
■ EPDT-198 ■
7.2 Disassembly procedure
(1) Remove the valve seat by using a spanner (width across flat: 36 mm).
(2) Remove the O ring (P-28)
(3) Remove the floating valve.
(4) Remove the clamping bolt (M10) of the cover.
(5) Remove the pin fixing the float and then remove the float.
(6) Remove the cross recessed pan head machine screw (M4) (by using a cross slot screwdriver).
(7) Remove the pin fixing the valve and then remove the valve and float.
(8) Remove the valve guide (width across flat: 14 mm) and the hanger.
8
.
Exploded view
Valve seat
O ring P-28
Float P
O ring G-100
Pin
Hanger
Cross
recessed pan
head machine
screw M4 X 8ℓ
Body
Valve P
Rivet
Cover
Hexagonal head
screw M10 X 25ℓ
Pin
Floating valve
Name plate
Valve guide