The TLV SA3 is a micro air vent designed for use on water-bearing pipes. It automatically discharges accumulated air from piping systems and should not be used on steam lines. The series includes the SA3-3 and SA3-10 models, suitable for different pressure ranges.

Safety Considerations

CAUTION

• DO NOT use this product outside the recommended operating pressure, temperature and other specification ranges. Improper use may result in such hazards as damage to the product or malfunctions which may lead to serious accidents. Local regulations may restrict the use of this product to below the conditions quoted.
• Use only under conditions in which no freeze-up will occur. Freezing may damage the product, leading to fluid discharge, which may cause burns or other injury.
• DO NOT use this product in excess of the maximum operating pressure differential; such use could make discharge impossible (blocked). Take measures to prevent people from coming into direct contact with product outlets. Failure to do so may result in burns or other injury from the discharge of fluids.
• Do not use excessive force when connecting threaded pipes to the product. Over-tightening may cause breakage leading to fluid discharge, which may cause burns or other injury.
• Be sure to use only the recommended components when repairing the product, and NEVER attempt to modify the product in any way. Failure to observe these precautions may result in damage to the product or burns or other injury due to malfunction or the discharge of fluids.
• When disassembling or removing the product, wait until the internal pressure equals atmospheric pressure and the surface of the product has cooled to room temperature. Disassembling or removing the product when it is hot or under pressure may lead to discharge of fluids, causing burns, other injuries or damage.
• Installation, inspection, maintenance, repairs, disassembly, and adjustment must only be carried out by trained maintenance personnel.

Specifications

Model	SA3-3	SA3-10
Maximum Operating Pressure (PMO)	0.3 MPaG (3.0 barg / 45 psig)	1.0 MPaG (10 barg / 150 psig)
Minimum Operating Pressure	0.01 MPaG (0.1 barg / 1.5 psig)	0.1 MPaG (1.0 barg / 15 psig)
Maximum Operating Temperature (TMO)	100 °C / 212 °F	100 °C / 212 °F
Maximum Allowable Pressure (PMA)*	1.0 MPaG (10 barg / 150 psig)	1.0 MPaG (10 barg / 150 psig)
Maximum Allowable Temperature (TMA)*	100 °C / 212 °F	100 °C / 212 °F

Maximum allowable pressure (PMA) and maximum allowable temperature (TMA) are PRESSURE SHELL DESIGN CONDITIONS (NOT OPERATING CONDITIONS).

Configuration

No.	Name	No.	Name
1	Body	10	Valve Seat Holder
2	Valve Seat	11	O-Ring
3	Base	12	Snap Ring
4	Float	13	Vinyl Tube
5	Valve Holder	14	Nameplate
6	Coil Spring	15	Worm Drive Clamp
7	Siphon Rod	16	Clamp Screw
8	Body Gasket
9	Valve

Proper Installation

1. Before installation, be sure to remove all protective seals.
2. Before installing the product, open the inlet valve and blow out the piping to remove any piping scraps, dirt and oil. Close the inlet valve after blowdown.
3. This product must be installed vertically, with the inlet at the bottom and the outlet at the top.
4. The product must be installed within the allowable angles of inclination of 5° vertically and front-to-back.
5. This air vent is for use on water-bearing pipes, and should therefore not be used on steam lines.

6. Install the product in a location where air is likely to collect, such as a bend in the piping.
7. To prepare for the unlikely event of a water leak, be sure to run the vinyl tube installed on the outlet to a catch pan or a drain pipe.
8. A valve and strainer (60 mesh or greater) must be installed before the product inlet.

Disassembly / Reassembly

Use the following procedures to remove components. Use the same procedures in reverse to reassemble.

Part	During Disassembly	During Reassembly
Base	Remove with a 32 mm (1¼") wrench	Tighten to a torque of 15 N·m (11 ft·lbf)
Body Gasket	Remove the gasket	Replace with a new gasket
Siphon Rod	Remove siphon rod from base	Attach the siphon rod to the base
Vinyl Tube, Worm Drive Clamp	Loosen the clamp screw with a Phillips screwdriver and remove the worm drive clamp; remove the vinyl tube from the valve seat	Reattach the vinyl tube to the valve seat, fasten with the worm drive clamp; tighten the clamp screw with a Phillips screwdriver
Valve Seat Holder	Remove with a 12 mm (½") wrench	Tighten to a torque of 8 N·m (5.9 ft·lbf)
Valve Holder (Valve), Coil Spring	Remove from the body	Insert the valve holder into the body's outlet and into the hole in the float
Float	Remove from the body	Place in body, align hole with outlet
Snap Ring	Remove with a needle-nose pliers	Insert securely into the slot
Valve Seat	Remove from the valve seat holder	Be careful not to damage the seating surface
O-Ring	Remove the O-Ring	Replace with a new O-Ring

Note: 1 N·m ≈ 10 kg·cm

Troubleshooting

When the air vent fails to operate properly, use the following table to locate the cause.

Problem	Cause	Remedy
No air discharged or discharge is poor	Air is not reaching the vent because the water in the piping is not being displaced by air	Make sure that the inlet piping is 15 mm (½") or larger
	The valve seat is clogged	Clean the valve seat
	The inlet or outlet piping is clogged	Clean the piping
	The operating pressure exceeds the rated maximum operating pressure	Replace the air vent with a model with a more suitable operating pressure
Water leaks when the valve is closed	The valve seat is clogged with dirt or scale or is damaged	Clean the valve seat or replace it with a new valve seat
	Improper installation	Correct the installation
Valve does not close and water spurts out	Specific gravity of the liquid is not suitable for this product	Select a product with suitable specifications for the operating conditions (consult TLV)