The composite exhaust valve integrates multiple exhaust mechanisms to meet the exhaust needs under different working conditions. Its core components usually include valve body, float, lever, valve disc, and exhaust port.

When the liquid flows in the pipeline, it will carry a certain amount of air mixed in. In the initial stage, as the water flow rises, air gathers at the top of the pipeline. At this point, the floating ball will float upwards due to buoyancy, driving the lever to move, causing the valve disc to open and air to be discharged from the exhaust port. This process is similar to an automatic air intake device, which can quickly discharge a large amount of accumulated air, prevent the formation of air resistance, and affect the normal transportation of liquids.

During the operation of the system, due to factors such as temperature changes and water pressure fluctuations, tiny bubbles will continuously precipitate in the water. Another key design of the composite exhaust valve - the exhaust film or micro exhaust structure plays a role. These tiny bubbles gather in a specific chamber inside the valve. When the pressure reaches a certain threshold, they push the exhaust film to deform, open the tiny exhaust channel, and continuously and stably discharge trace amounts of air, avoiding damage to pipelines and equipment caused by cavitation and ensuring smooth operation of the system.

Some composite exhaust valves also have automatic water replenishment function. When the system experiences a pressure drop due to exhaust, the water level sensing device is triggered, and the valve's water replenishment mechanism is activated. An appropriate amount of clean water is replenished into the pipeline to maintain stable system pressure, prevent negative pressure, and ensure water supply safety.

Precautions for using composite exhaust valve:

1. Regular maintenance

-Cleaning and maintenance: Regularly clean the external and internal components of the exhaust valve to keep it clean and tidy. Especially for the exhaust cap, ensure that no impurities fall into the exhaust hole.

-Lubrication treatment: For parts that require lubrication, such as lever moving parts, appropriate lubricating grease should be applied regularly to reduce friction and wear.

-Check fasteners: Regularly check whether bolts and other fasteners are loose, and tighten them in a timely manner if they are loose.

2. Anti freezing measures

-Insulation treatment: When using composite exhaust valves in cold regions or low-temperature environments, insulation measures should be taken to prevent moisture from freezing or valve cracking.

-Drainage and antifreeze: When not in use for a long time, the water inside the valve body should be drained to avoid freezing and cracking the valve at low temperatures.

3. Safe operation

-Avoid overpressure: During use, ensure that the working pressure of the exhaust valve does not exceed its design range to avoid damage or failure caused by overpressure.

-Prevent negative pressure: When negative pressure occurs in the pipeline, the exhaust valve should be able to quickly suck in external air to prevent the harm of negative pressure. Therefore, close attention should be paid to changes in pipeline pressure during use.

-Prohibition of illegal operations: It is strictly prohibited to use chemical solvents such as alcohol and gasoline to clean or repair the exhaust valve, in order to avoid damaging the valve or causing safety accidents.