German EL-O-MATIC valves EL-O-MATIC models EL-O-MATIC prices

EL-O-MATIC valves are devices used to vent air in HVAC systems during operation. During the operation of heating and HVAC systems, gases released from water when heated, such as hydrogen and oxygen, can cause numerous adverse effects that damage the system and reduce thermal efficiency. If these gases are not expelled in time, they can lead to many negative consequences, such as: corrosion caused by oxidation; formation of air pockets in radiators; poor and unbalanced hot water circulation, causing some radiators to be partially cold; noise in pipes when running with air; and cavitation in circulation pumps. Therefore, waste gas in the system must be discharged in time, highlighting the important role of automatic air vents.

EL-O-MATIC valve working principle

When the system is filled with water, gases in the water continuously escape and accumulate at the highest point due to changes in temperature and pressure. When the gas pressure exceeds the system pressure, the float drops, driving the valve stem downward, opening the valve port, and allowing gas to discharge continuously. When the gas pressure is lower than the system pressure, the float rises, driving the valve stem upward, and closing the valve port. The automatic air vent operates in this continuous cycle.

EL-O-MATIC valve applications

Valves installed on controllers in the system architecture to release air pockets generated in heating systems and water supply pipelines. They are widely used in manifold distributors, radiators, underfloor heating, air conditioning, and water supply systems.

EL-O-MATIC valve installation

1) Automatic air vents must be installed vertically to ensure that the internal float remains in a vertical position, so as not to affect air venting; 2) When installing automatic air vents, it is best to install them together with isolation valves. This ensures system tightness and prevents water leakage when the air vent needs to be removed for maintenance; 3) Automatic air vents are generally installed at pipe sections where air tends to accumulate, such as the highest point of the system or the highest point of a pipe section, to facilitate smooth air venting.

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