Yoshitake TA-18ML Bedienungsanleitung

■EPDT-308■

MODEL TA-18ML

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. Specifications and Capacities······································· 1

3. Dimension and weight ··············································· 2

4. Operation ······························································· 3

5. Maintenance and Inspection········································· 4

5.1 Precaution before use·········································4-5

5.2 Precaution for use················································ 5

5.3 Piping example···················································· 5

5.4 Troubleshooting··················································· 6

5.5 Disassemble······················································· 6

6. Exploded view··························································· 7

After Sales Service

■EPDT-308■

1. Overview

TA-18ML Air vent valve is compact float type and discharge air automatically from piping. Body material is

made of stainless steel, offering high resistance to corrosion and durability. Mainly TA-18ML can be used for

water boiler and electrical hot water generator etc.

2. Specifications and Capacities

2 Specifications

Nominal size 6A 10A 15A 20A

Application Cold and hot water

Working pressure 0.01-0.3 MPa

Maximum temperature

100°C

Material

Body,cover Stainless steel

Disc FKM (fluororubber)

Float Heat-resistance plastic

Guide Brass

Connection

Inlet JIS R1/8 JIS R3/8 JIS R1/2 JIS R3/4

Outlet Hose joint Φ6

Working pressure MPa

Exhaust capacity L/min

(Standard condition)

■EPDT-308■

3. Dimensions and Weights

(mm)

Nominal

Size D

H A

(Width

across flat)

Weight

(kg)

6A R 1/8 83 - 0.12

10A R 3/8 87 - 0.13

15A R 1/2 89 32 0.13

20A R 3/4 89 32 0.13

■EPDT-308■

4. Operation

1. After the installation, air exists in the product, and the float [10] is lowered by its own weight. In this

condition, since the valve disc [6] is kept open by the lever [4], 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 come up on

buoyancy and the force that keeps the valve disc open through the lever is lost. Then the valve disc is

closed by the spring [9] and pressure to the valve disc.

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 to discharge air.

4. Repeating the processes 2. and 3., air in the system can be removed.

Structure

No.

Parts name

Body

Cover

Spring tray

Lever

Hanger metal

Valve disc

Guide

Valve seat

Spring

10 Float

11 O Ring

12 O Ring

13 O Ring

14 Stopper

15 Elbow cap

■EPDT-308■

5. Maintenance and Inspection

5.1 Precaution before use

Caution

1. Make sure to attach joint and hose to outlet of the product, and lead them to drain ditch.

Do not remove the top of the cap stopper [Pic. 2] when operation.

*Fluid leaks because foreign substance exist on valve disc and seat when elbow cap is loosen,

leakage of liquid to outside from elbow cap may happen. Do not use the product around the place

where leaked liquid can wet another equipment.

*Leakage of liquid result in burns for high-temperature fluid or cause bodily injury or damage to the

property when valve leakage happens.

Pic. 1

2. Install the product to a place where check and handle can be done easily in aim of tightening the

elbow cap when leakage happens.

*Leakage of liquid result in burns for high-temperature fluid or cause bodily injury or damage to the

property when valve leakage happens.

3. 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.

4. Before installing the product, remove foreign substance and scale from the piping.

*Failure to follow this notice may prevent the product from functioning properly.

5. As for nominal size 6A and 10A, tighten the product by hand into piping. As for nominal size 15A and

20A, install the product by proper tool like wrench by hexagonal place on the body. And do not

tighten the product excessively.

*Failure to follow this notice may cause deformation of the body and malfunction.

6. Install the product to a place where maintenance and inspection easily.

7. Prevent the product from excess of the pressure e.g. water hammer.

8. When test operation for hot water generator, check there is no leakage by means of inspection of

connection and float vent etc.

9. When leakage of liquid happens because of

foreign substance like dust on the valve disc and

seat, please clean the valve seat (see 5.4

Troubleshooting). As immediate action, remove

top pf the cap and tighten the elbow cap to stop

the leakage. (Pic.2)

Tighten the elbow cap after removing hose. After

tightening please clean valve seat and disc.

Pic. 2

Stopper Elbow cap

Elbow cap

Stopper

Top of Stopper

■EPDT-308■

Pressure

reducing valve

Boiler

Relief

valve

Float vent

Air out

Pump

Convector

Base board heater

10. Because elbow cap is made of plastic, it’s consumable parts.

11. At brass parts, corrosion can be generated depending on the water quality and it cause malfunction. For

the place where corrosion can be expected, select the product made of suitable material like stainless

steel.

12. In case ingredient giving negative influence to internal parts is contained in the liquid and environment,

deterioration of internal parts can be speeded and it cause leakage and malfunction.

13. In case liquid is accumulated in the product for long-term, moving parts can be sticky and cause

malfunction.

14. Nominal size selection chart shows reference value. Suitable size differ according to piping and

environment, so around 20% safety factor is necessary for the selection of the size.

15. To avoid potential difference, do to connection different metal parts otherwise corrosion product or parts

can happen.

5.2 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.

Caution

1. Follow the designated working pressure and Max. temperature.

*Failure to follow this may result in malfunction.

2. When test operation for hot water generator, check there is no leakage by means of inspection of

connection and float vent etc.

3. When leakage of liquid happens because of foreign substance like dust on the valve disc and seat, please

clean the valve disc and seat (see 5.4 Troubleshooting).

5.3 Piping example

Using this product as a combination with Air Out (Air separator from water) type AO-2, it make efficiency of

air discharge higher.

■EPDT-308■

5.4 Troubleshooting

Trouble Cause Remedy

ater blowout

Foreign substances exist on the

valve disc and seat.

emove

the valve seat

by spanner

and

clean the scale and dust.After cleaning,

fit the O ring (S9) into the ditch on the

valve seat and retighten it by spanner.

No air discharge

ir accumulates too slowly.

Install the valve on a place where air is

easy to accumulate.

nternal piping pressure is more

than the appropriate value.

Lower the internal piping pressure, or

replace the valve by one for high

pressure.

5.5 Disassemble

Warning

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.

Caution

1. To maintain function and performance, do regular inspection.

*If any problem, please contact well-trained agent.

2. Disassemble must be done by well-trained agent or manufacture.

3. After long-term stop of operation, please inspect operation.

*If any problem, please contact well-trained agent.

1. Stop heat resource (Boiler and hot water generator etc.) and pump.

2. Discharge internal pressure in the piping.

3. Remove the valve seat by spanner (12mm). (Pic.3)

Remove the valve seat by spanner and clean the scale and dust. (Pic. 4)

Pic. 3 Pic. 4

After cleaning, fit the O ring (S9) into the ditch on the valve seat and retighten it by spanner. (Torque: Approx.

3N・m). O Ring and elbow cap are consumable parts.

Valve

Seat

O Ring (S9）

Valve disc

Valve

Seat

Elbow cap

■EPDT-308■

6. Exploded View

* Because elbow cap is made of plastic, it’s consumable parts.

Elbow cap

Valve Seat

Valve disc

O Ring

Cap stopper

Body

Guide

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