The automatic vent valve is a key component used to automatically remove air from the piping system, and its working principle is to take advantage of the difference in the density of air and water to automatically expel the accumulated air while preventing the creation of a vacuum. This helps maintain system efficiency, reduces noise and corrosion, and prevents water hammer. Generally speaking, automatic exhaust valves can be divided into the following types:
1.Small exhaust valves(Automatic Exhaust Valve).
These are usually installed at the highest points of a pump system, heating system, or cooling system to remove air generated during operation or accumulated during water filling.
2.Combined exhaust valve
The combined exhaust valve expels both large and trace amounts of air. They are typically installed at the highest point of the pipe network to automatically vent air that has accumulated during the filling of water, drainage, or operation of the piping system.
3.Float type exhaust valve
This type of exhaust valve is controlled by a float to open and close the valve. When the air in the duct accumulates to a certain extent, the pressure of the air causes the float to descend and open the valve to release the air.
4.Power exhaust valve
The powered exhaust valve controls the opening and closing of the valve by means of water flow. They are suitable for large piping systems and effectively remove air from the piping.
5.Micro exhaust valves
Micro vent valves are specifically designed to continuously remove trace amounts of air from the system, helping to maintain the efficiency and safety of the piping system over time.
Selection criteria and installation precautions
When choosing an automatic exhaust valve, the following factors need to be considered:
Work pressure: The valve should be able to withstand the maximum operating pressure and temperature of the system.
Product material: Select the right material according to the type of liquid and the corrosiveness of the system.
Connection: Choose a flanged or threaded exhaust valve according to the needs of the field installation.
Traffic demand: Select the appropriate size of the exhaust valve according to the flow rate of the system design.
When installing an automatic exhaust valve, the following should be noted:
The valve should be installed at the highest point of the system for smooth venting.
Avoid installing in places with strong vibrations, so as not to affect the normal operation of the valve.
The valve needs to be checked for leaks, and regular maintenance and inspection are carried out.
Application areas of automatic exhaust valves
Automatic exhaust valves are widely used in the following fields:
HVAC systems.
irrigation and water supply systems.
Fire protection system.
Thermal and refrigeration circulation systems.
Industrial piping systems.
Automatic vent valves are an integral part of ensuring the efficient and safe operation of the piping system. Understanding the different types of exhaust valves and their respective applications can help you select the most appropriate product for a particular system to optimize performance and extend the life of your system. Proper installation and regular maintenance can maximize the effectiveness of an automatic exhaust valve and avoid problems caused by air build-up in the system.