Return valve

A non-return valve in heating is a mechanical device that allows the flow of liquid or gas in one direction only and prevents its return or reverse flow. It is a type of valve that opens or closes the flow path depending on the flow direction.

The main purpose of non-return valves is to ensure a one-way flow of liquid or gas in the heating system and to prevent their return to previous parts of the system. This is especially important in cases where it is necessary to maintain pressure, flow or temperature in certain parts of the system.

Non-return valves are often used in various parts of the heating system, such as pipes, radiators or heating elements. They are placed in such a way as to ensure the one-way flow of the heat-carrying liquid (for example, water) heated in the boiler to the heating equipment and prevent it from returning back.

Check valves can have a variety of designs, including spring-loaded, lever-operated, or jet-type valves. Their operation is based on the principle of unidirectional flow and a closing mechanism that opens when flow is in the right direction and closes when reverse flow is attempted.

The presence of non-return valves in the heating system is important for the proper operation and efficiency of the system. They help minimize heat loss, ensure unidirectional flow of the heat transfer fluid and prevent unwanted backflow effects such as heating unwanted parts of the system or disrupting it.

It is important to check and maintain check valves regularly to ensure they function properly and to minimize the risk of malfunctions or leaks in the heating system.