Yoshitake TA-16 Series User manual

■EPDT-30■
MODEL TA-16 Series
TA-16, TA-16L, TA-16CVA and TA-16CVS
AIR VENT 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. Features·································································· 1
3. Specifications and Capacities······································· 1
3.1 Specifications······················································ 1
3.2 Exhaust capacity chart·········································· 2
4. Dimensions and Weights············································· 2
5. Operation ······························································· 4
6. Maintenance····························································· 4
6.1 Precaution before use··········································· 4
6.2 Precaution for use················································ 5
6.3 Piping example···················································· 5
6.4 Troubleshooting··················································· 5
6.5 Precaution for maintenance···································· 6
7. Exploded view··························································· 6
7.1 Caution for assembly············································ 6
8. Optional parts ··························································· 7
8.1 Optional parts······················································ 7
8.2 Dimensions of optional parts ·································· 7
8.3 Combination of the product and optional parts············ 8

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■EPDT-30■
1. Overview
Air vent valve is essential for air-conditioning piping system because air mixed in its piping leads to decline of
heat-effectiveness, noise production or corrosion of equipment.
The TA-16 series air vent valve is made of stainless steel, except for the valve disc and gasket, offering high
resistance to corrosion and durability. Its body is compact, and air is discharged automatically.
Moreover, available with the TA-16CV series air vent valve, which does not suck in air outside in order to
prevent water level drop in piping when the equipment stops operating.
In addition, also available with various piping connection parts for exhaust outlet, such as manual valve or
swivel joint (capable of turning 360 degrees). So, it is possible to meet any exhaust outlet piping widely.
2. Features
1. All parts, except for the valve disc and gasket, are made of stainless steel, offering high resistance to
corrosion and durability (for the TA-16L, TA-16CVA and TA-16CVS, connection parts of exhaust outlet are
made of copper).
2. Wide working pressure range (0.01-1.0 MPa) ensures stable exhaust capacity.
3. Can be installed in small space because of compact body.
4. No leakage by fluororubber valve disc.
5. Spring is attached to install joints in the exhaust outlet (except for the TA-16L).
6. Available with various piping connection parts for exhaust outlet, such as manual valve or swivel joint
(capable of turning 360 degrees).
7. Complies with Japanese Water Works Law.
3. Specifications and Capacities
3.1 Specifications
Model TA-16 TA-16L TA-16CVA TA-16CVS
Nominal size 15-25A
Application Cold and hot water
Working pressure 0.01-1.0 MPa
Check valve No Provided
Maximum temperature 90°C
Material
Body,cover,
float Stainless steel
Valvedisc,
gasket FKM (fluororubber)
L-shaped
hosejoint - Brass -
Check valve
joint (check
valve) - - FKM (fluororubber)
Connection
Inlet JIS R screwed
Outlet JIS Rc 1/4
screwed Φ6 (hose inside diameter) JIS Rc 1/4 screwed

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3.2 Exhaust capacity chart
4. Dimensions and Weights
■TA-16
Nominal
size d H Weight (kg)
15A R 1/2 118 0.66
20A R 3/4 120 0.68
25A R 1 124.5 0.74
Working pressure MPa
Exhaust capacity L/min
(Standard condition)

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■EPDT-30■
■TA-16L
Nominal
size d H1H Weight (kg)
15A R 1/2 136 143 0.70
20A R 3/4 138 145 0.72
25A R 1 144 149.5 0.78
■TA-16CVA
Nominal
size d H1H Weight (kg)
15A R 1/2 135.5 146 0.72
20A R 3/4 137.5 148 0.74
25A R 1 142 152.5 0.80
■TA-16CVS
Nominal
size d H Weight (kg)
15A R 1/2 142 0.70
20A R 3/4 144 0.72
25A R 1 148.5 0.78
（hose inside diameter）

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■EPDT-30■
5. Operation
1. After the installation, air exists in the product, and the float [9] is lowered by its own weight. In this
condition, since the valve disc [5] is kept open by the lever [7], air is discharged outside by the internal
pressure of the system.
2. When air is discharged, hot or cold water flows into the product to make the float [9] come up on
buoyancy and the force that keeps the valve disc [5] open through the lever [7] is lost. Then the valve
disc [5] is closed by the spring [6] and pressure to the valve disc [5].
3. When air bubbles are generated in the system and collected into the product, the inside water level
drops, and the float loses buoyancy and opens the valve disc [5] to discharge air.
4. Then the operation goes back to the above process [2]. Repeating the processes [2] and [3], air in
the system can be removed.
No.
Main parts
1 Body
2 Cover
3 Seat (Exhaust outlet)
4 Hanger Metal
5 Valve Disc
6 Spring
7 Lever
8 Nut
9 Float
10 Gasket
11 Bolt
The above drawing shows the structure of the TA-16. The TA-16L has L-shaped hose joint screwed in the
seat [3]. The TA-16CVA and TA-16CVS have check valve joints (the CV-16A and CV-16S respectively)
screwed in each seat [3].
6. Maintenance
6.1 Precaution before use
Caution
1. Make sure to attach joint and hose to outlet of the product, and lead them to drain ditch.
* Failure to follow this notice may contaminate the surroundings, result in burns for high-temperature
fluid or cause bodily injury or damage to the property when valve leakage happens.
2. Install the product vertically to a place where air is easy to accumulate.
* Failure to follow this notice may prevent the product from functioning properly.
3. Before installing the product, remove foreign substances and scale from the piping.
* Failure to follow this notice may prevent the product from functioning properly.
1. Install stop valve (cock or gate valve) to inlet of the product for maintenance and inspection.
2. Plumb the exhaust outlet in a way that prevents backflow.

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6.2 Precaution for use
Warning
Do not touch the product with bare hands in case of high-temperature fluid.
* Failure to follow this notice may result in burns.
1. A small amount of water may blow out with air at air discharge for initial operation. This is not a
failure of the product.
6.3 Piping example
6.4 Troubleshooting
Trouble Cause Remedy
No air discharge
1.
T
he stop valve on inlet side of the
product is kept closed.
1.
Open the stop valve fully.
2.
I
nternal piping pressure
is more
than the appropriate value.
2.
Lower the internal piping pressure, or
replace the valve by one for high
pressure.
3.
A
ir accumulates too slowly.
3.
Install the valve on a place where air is
easy to accumulate.
W
ater blowout
1.
Foreign substances exist on t
he
valve disc [5] and seat [3].
1.
R
emove and clean the valve disc [5] and
seat [3].
2.
T
he float [9] is
damaged
and
cannot work properly.
2.
Replace the float [9].
Sucking in air outside
(the TA-16CVAand
TA
-
16CVS)
1.
Foreign substances exist on the
check valve.
1.
R
emove foreign substances.
Stop valve
To drain ditch
The drawing on the left shows a piping example of the
TA-16.

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■EPDT-30■
6.5 Precaution for maintenance
Warning
Disassembling and inspections shall be performed by a professional or a valve
manufacturer.
1. Completely discharge internal pressure of the product, piping and equipment, and
cool down the product prior to disassembling or maintenance in case of
high-temperature fluid.
*Failure to follow this notice may result in scalds or bodily injury due to residual
pressure.
7. Exploded View
7.1 Caution for assembly
Bolt
Washer
Cover
Seat
Hanger
metal
Valve disc
Valvecover
Spring
Lever
Nut
Fook
Float Gasket
Body
Integral structure
Integral
structure
Integral
structure
The above drawing shows the structure of the TA-16.
The TA-16L has L-shaped hose joint screwed in the
seat [3]. The TA-16CVA and TA-16CVS have check
valve joints (the CV-16A and CV-16S respectively)
screwed in each seat [3].
To attach the cover [2] to the body [1], place the body
[1] from the above on the cover [2].

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■EPDT-30■
8. Optional parts
8.1 Optional parts (piping connection parts for exhaust outlet)
Optional parts Connection Others
L
-
shaped hose joint
R 1/4 X
Φ
6 (hose inside
diameter)
This joint can be installed at our factory
(Mo
del: TA
-
16L).
Manual valve with copper
joint
R 1/4 X
Φ
8 (copper pipe
outside diameter)
Install this joint on the customer
’
s side.
Manual valve with hose joint
R 1/4 X
Φ
6 (hose inside
diameter)
Install this joint on the customer
’
s side.
Swivel joint
R
1/4 X Rc 1/4
Install this joint on the customer
’
s side.
Swivel copper pipe joint
R 1/4 X
Φ
8 (copper pipe
outside diameter)
Install this joint on the customer
’
s side.
Swivel hose joint
R 1/4 X
Φ
6 (hose inside
diameter)
Install this joint on the custome
r
’
s side.
C
heck valve joint (angle type)
R 1/4 X Rc 1/4
This joint can be installed at our factory
(Model: TA
-
16CVA).
C
heck valve joint (straight
type)
R 1/4 X Rc 1/4
This joint can be installed at our factory
(Model: TA
-
16CVS).
Optional parts, except for L-shaped hose joint and check valve joint, are requested to be installed on the
customer’s side to comply with model registrations for Japan Water Works Association.
8.2 Dimensions of optional parts
Hose inside
diameter Hose inside
diameter
Copper pipe
outsidediameter
Copperpipe
outsidediameter Hose inside
diameter
L-shaped hose joint Manual valve
with copper joint Manual valve with hose joint
Swivel joint Swivel copper pipe joint Swivel hose joint
Check valve joint
（angle type）Check valve joint （straight type）

8
■EPDT-30■
8.3 Combination of the product and optional parts
Caution: If check valve joint and swivel joint are used in combination, install the check valve joint to
the TA-16 first, and then the swivel joint.
Check valve joint
(CV
-
16S)
Check valve joint
(CV
-
16A)
L-shaped
hose joint Manual valve withcopper joint Manual valve withhose joint Swivel joint Swivelcopper pipe joint Swivelhosejoint
L-shaped
hose joint Manual valve withcopper joint Manual valve withhose joint Swivel joint Swivel copper pipe joint Swivelhosejoint