The Yoshitake TA-16 series is a compact stainless steel air vent valve essential for air-conditioning piping systems, building equipment, and industrial setups. Air mixed in piping leads to a decline in heat effectiveness, noise production, or equipment corrosion. The TA-16 series discharges air automatically and offers high durability with excellent corrosion resistance. The series includes the standard TA-16, the TA-16L equipped with an L-shaped hose joint, and the TA-16CVA/TA-16CVS models which feature integrated check valves to prevent outside air from being drawn in during pressure drops.

Features

• Stainless Steel Construction: All parts, except for the valve disc, gasket, and brass L-shaped hose joint (TA-16L), are made of stainless steel for high corrosion resistance and durability.
• Stable Capacity: A wide working pressure range (0.01 to 1.0 MPa) ensures stable exhaust capacity.
• Compact Design: Can be easily installed in small spaces due to its compact body.
• Reliable Sealing: FKM (fluororubber) valve disc and gasket ensure zero leakage.
• Versatile Connections: Springs are attached to install various optional joints in the exhaust outlet (except for the TA-16L), such as manual valves or 360-degree swivel joints.

Specifications

Model	TA-16	TA-16L	TA-16CVA	TA-16CVS
Nominal size	15-25A	15-25A	15-25A	15-25A
Application	Cold and hot water	Cold and hot water	Cold and hot water	Cold and hot water
Working pressure	0.01-1.0 MPa	0.01-1.0 MPa	0.01-1.0 MPa	0.01-1.0 MPa
Check valve	No	No	Provided	Provided
Maximum temp.	90°C	90°C	90°C	90°C
Body/Cover Material	Stainless steel	Stainless steel	Stainless steel	Stainless steel
Disc/Gasket Material	FKM (fluororubber)	FKM (fluororubber)	FKM (fluororubber)	FKM (fluororubber)
Inlet Connection	JIS R screwed	JIS R screwed	JIS R screwed	JIS R screwed
Outlet Connection	JIS Rc 1/4 screwed	φ6 (hose inside dia.)	JIS Rc 1/4 screwed	JIS Rc 1/4 screwed

Dimensions and Weights

TA-16

Nominal size	d	H (mm)	Weight (kg)
15A	R 1/2	118	0.66
20A	R 3/4	120	0.68
25A	R 1	124.5	0.74

TA-16L

Nominal size	d	H1 (mm)	H (mm)	Weight (kg)
15A	R 1/2	136	143	0.70
20A	R 3/4	138	145	0.72
25A	R 1	142.5	149.5	0.78

TA-16CVA (Angle Type)

Nominal size	d	H1 (mm)	H (mm)	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 (Straight Type)

Nominal size	d	H (mm)	Weight (kg)
15A	R 1/2	142	0.70
20A	R 3/4	144	0.72
25A	R 1	148.5	0.78

Exhaust Capacity Chart

TA-16

TA-16L

Operational Description

1. After installation, air exists in the product, and the float [9] is lowered by its own weight. The valve disc [5] is kept open by the lever [7], allowing air to be discharged outside by the internal pressure of the system.
2. When air is discharged, water flows into the product, making the float [9] rise due to buoyancy. The force keeping the valve disc open is lost, and the valve disc [5] is closed by the spring [6] and fluid pressure.
3. When air bubbles are generated in the system and gather in the product, the inside water level drops. The float loses buoyancy, lowering to open the valve disc [5] and discharge air.
4. Repeating processes 2 and 3, air in the system is continuously removed.

Installation and Piping

Installation Precautions

• Remove foreign matter and scale from the lines before installation.
• Install the product vertically (tolerance angle 5°) where air is likely to gather.
• Install a stop valve (cock or gate valve) at the inlet side for maintenance and inspection.
• Attach a joint and hose to the outlet and lead them to a drain ditch to prevent property damage or burns in case of valve leakage.
• Make sure the end of the piping or tube on the outlet has a 50mm clearance over the flood level.

High Temperature Warning

Do not touch the product with bare hands in case of high-temperature fluid to prevent severe burns.

Operating Note

A small amount of water may blow out with air during the initial operation. This is not a product failure. If the piping drops to negative pressure, the TA-16 and TA-16L may draw in outside air. Use the CVA or CVS models if preventing air intake is required.

Maintenance and Troubleshooting

Daily and Periodic Inspection

Inspection	Frequency	Item to Check	Action
Daily	1 time/day	Working state, valve seat leakage, external leakage	Verify air is venting properly and check visually for any leaks.
Periodic	1 time/year	Valve Disc, Seat, Gasket, Float	Disassemble and clean scale/dust. Replace damaged components.

Synthetic rubber parts are consumable. Recommended replacement is 3 years for the Valve Disc set and 5 years for the Gasket.

Troubleshooting

Trouble	Cause	Remedy
No air discharge	1. Stop valve on inlet side is closed. 2. Internal piping pressure exceeds rating. 3. Air accumulates too slowly.	1. Open stop valve fully. 2. Lower pressure or replace with high-pressure model. 3. Reinstall where air easily gathers.
Water blowout from exhaust	1. Foreign substances on valve disc and seat. 2. Float is damaged.	1. Remove and clean disc and seat. 2. Replace the float.
External leakage	1. Damage to body or cover from abnormal pressure. 2. Gasket is damaged.	1. Replace the product. 2. Replace the gasket.
Sucking in outside air (CVA/CVS)	1. Foreign substances on the check valve.	1. Remove foreign substances.

Exploded View

No.	Part Name	Material
1	Body	Cast Stainless Steel (SCS13)
2	Cover	Stainless Steel (SUS304)
3	Seat (Exhaust outlet)	Stainless Steel (SUS304)
4	Hanger Metal	Stainless Steel (SUS304)
5	Valve Disc	FKM (fluororubber)
6	Spring	Stainless Steel (SUS304)
7	Lever	Stainless Steel (SUS304)
8	Nut	Stainless Steel (SUS)
9	Float	Stainless Steel (SUS304)
10	Gasket	FKM (fluororubber)
11	Bolt	Stainless Steel (SUS)

(Note: TA-16L has an L-shaped hose joint screwed into the seat. TA-16CVA/CVS have respective check valve joints installed.)

Optional Parts

Various piping connection parts are available for the exhaust ports of TA-16 air vent valves.

Optional Parts	Connection	Notes
L-shaped hose joint	R 1/4 × φ6 (hose inside dia.)	Pre-installed on Model: TA-16L
Manual valve (copper joint)	R 1/4 × φ8 (copper pipe outside dia.)	Installed on customer's side
Manual valve (hose joint)	R 1/4 × φ6 (hose inside dia.)	Installed on customer's side
Swivel joint	R 1/4 × Rc 1/4	Installed on customer's side (rotates 360°)
Swivel copper pipe joint	R 1/4 × φ8 (copper pipe outside dia.)	Installed on customer's side
Swivel hose joint	R 1/4 × φ6 (hose inside dia.)	Installed on customer's side
Check valve joint (angle)	R 1/4 × Rc 1/4	Pre-installed on Model: TA-16CVA
Check valve joint (straight)	R 1/4 × Rc 1/4	Pre-installed on Model: TA-16CVS