Yoshitake TA-16 Series Manuel utilisateur

■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

■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

■EPDT-30■

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)

■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）

■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

Gasket

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.

■EPDT-30■

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

he stop valve on inlet side of the

product is kept closed.

Open the stop valve fully.

nternal piping pressure

is more

than the appropriate value.

Lower the internal piping pressure, or

replace the valve by one for high

pressure.

ir accumulates too slowly.

Install the valve on a place where air is

easy to accumulate.

ater blowout

Foreign substances exist on t

valve disc [5] and seat [3].

emove and clean the valve disc [5] and

seat [3].

he float [9] is

damaged

and

cannot work properly.

Replace the float [9].

Sucking in air outside

(the TA-16CVAand

16CVS)

Foreign substances exist on the

check valve.

emove foreign substances.

Stop valve

To drain ditch

The drawing on the left shows a piping example of the

TA-16.

■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].

■EPDT-30■

8. Optional parts

8.1 Optional parts (piping connection parts for exhaust outlet)

Optional parts Connection Others

shaped hose joint

R 1/4 X

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

8 (copper pipe

outside diameter)

Install this joint on the customer

’

s side.

Manual valve with hose joint

R 1/4 X

6 (hose inside

diameter)

Install this joint on the customer

’

s side.

Swivel joint

1/4 X Rc 1/4

Install this joint on the customer

’

s side.

Swivel copper pipe joint

R 1/4 X

8 (copper pipe

outside diameter)

Install this joint on the customer

’

s side.

Swivel hose joint

R 1/4 X

6 (hose inside

diameter)

Install this joint on the custome

’

s side.

heck valve joint (angle type)

R 1/4 X Rc 1/4

This joint can be installed at our factory

(Model: TA

16CVA).

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）

■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

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