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Other Devices

VC Series/VS1C/SA3 - Automatic Air Vents

Price: Contact

Model: VC Series/VS1C/SA3

Trademark: TLV

Origin: Japan

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Automatic Air Vents

VC Series/VS1C/SA3

Continuously discharge air and gas that build up inside water supply pipes

Automatic air vents feature a relatively small orifice and are suitable for discharging air and other gases during normal operation. By installing them in places where air tends to accumulate, it is possible to prevent issues caused by air trapped in water supply pipes.

Air vents can also help to prevent a vacuum from forming in pipes. When the main valve is open and pressure inside the pipes falls below the pressure of the surrounding atmosphere, air will enter the valve, preventing vacuum conditions from forming and allowing liquid to be easily passed downstream.

Due to the relatively smaller discharge capacity of automatic air vents, in cases where it is necessary to discharge large amounts of air/gas rapidly upon startup, it is best to use these products in combination with a dedicated rapid initial air vent.

Air Vents Pamphlet (1930 KB)

Benefits and Features

Automatic Air Vents (all series)

Simple construction with no levers or hinges
Only one moving part: the Free Float®. This eliminates concentrated wear and provides long service life.
Can function as a vacuum breaker by allowing air to flow in when a vacuum forms
Provides a tight, reliable seal

VC Series

Precision-ground float, rubber valve seat

VS1C Series

High precision-ground float, 3-point seating
Can be used with liquids with specific gravities as low as 0.8

SA3 Series

Light-weight, compact
Auxiliary valve seat enables maintenance during operation
Provides a tight seal, even at pressures as low as 0.01 MPa

Application Areas

Automatic air vents are suitable for:

processes which require the continuous discharge of air/gas under normal operation conditions
water supply pipes, cooling & heating equipment (SA3, VC)
use in small and narrow installation spaces (SA3)
fan coils, radiators, and other air conditioning equipment (SA3)
suitable for non-water liquid processes (VSC1, non-flammable and non-corrosive liquids only)
*When rapid discharge of large quantities of air is required upon startup, please use together with a rapid initial air vent.

Product Details

Model	Connection	Body Material	Fluid Applicable	PMO (MPaG)	Min. Operating Pressure (MPaG)	TMO (°C)	Discharge Capacity (ℓ/min)(*1)	Specifications	Manual
VC2	Screwed	Bronze (CAC407)	Water	0.5	0.05	90	25	Specifications	Manual
VC3	Screwed	Cast Iron (FC250)	Water	0.6	0.1	90	90
VC4	Screwed	Cast Iron (FC250)	Water	1.0	0.1	90	380
VS1C	Screwed	Stainless Steel (ASTM A351 Gr.CF8)	Water Other Liquids	2.1	0.01	150	170	Specifications	Manual
SA3	Screwed	Brass	Water	0.3/1.0	0.01/0.1	100	9.2	Enquire	Manual
VS3	End Clamp	Stainless Steel (ASTM A351 Gr.CF8)	Water Other Liquids	0.6	0.01	150	110	Specifications	Manual