Air Vent Valve

Air Vent Valve

An Air Vent Valve is a safety device that discharges air at the water supply piping in order to avoid air related problems in the water piping systems.

The product line-up includes both air vents for use on pipelines for liquids and those for use on pipelines for steam.

The air vents for piping carrying liquids make use of Free Float steam trap technology for a tight seal and excellent durability.

There are two types of air vent series for piping carrying liquids. One features a specialized rapid initial air vent to discharge initial air when the supply of liquid begins, and the other features an automatic air vent to discharge air regularly during operation.

The air vents for steam piping make use of thermostatic steam trap technology to discharge not only cold initial air, but also hot air.

Application of Air Vent

• The cold and hot water supply system
• Hot water boiler
• The solar hot water system
• Other various devices
• Air conditioning system
• Hot water heater appliance
• Pressure tank

Type of Air Vent

Rapid Air Vent

• This type of air vent use where the discharge of large quantities of initial air is required. Once the valve closes, it remains closed even if air enters. Also, install an automatic air vent if it is necessary to discharge air during operation.

Applications

• Water lifting pumps
• fire-extinguishing equipment
• water transport lines
• water storage tanks
• hot water tanks
• holding tanks for liquids.
• Water
• hot water

Automatic Air Vent

Automatic air vents are most suited for heating systems and other closed circuit hot water systems which require an efficient and automatic removal of air whilst the system fills with water.

A vacuum break is fitted onto the bottom of the valve in order to prevent an air lock forming and encourages air to be released from the water within the system.

Steam Air Vent

Balance-pressure type air vents are usually recommended for removing air in steam systems. Bimetal type air vents also exist, however, these are not recommended for removing hot air from steam systems because the valve opening temperature is more or less fixed. This is different from the valve on balanced pressure type air vents, which opens at a temperature that is a certain number of degrees lower than the saturation temperature of the steam. Hot air is therefore discharged at all times regardless of fluctuations in steam pressure.