Air check valve is a valve used to control the unidirectional flow of air, ensuring that air can only pass in one direction and preventing reverse flow or medium backflow.

application field

Building ventilation and air conditioning system: Installed at the outlet of the fan, it prevents indoor air from flowing back to the fan when the fan stops running, maintains the normal flow direction of indoor air, avoids odors, dust and other backflow, and also helps improve the energy efficiency of the air conditioning system and reduce energy waste.

Industrial compressed air system: used for air compressor outlet, air storage tank inlet, and pneumatic tool supply pipeline, etc., to prevent compressed air backflow during shutdown, protect the air compressor and other equipment from damage, and ensure the stable operation of the compressed air system.

Medical equipment: such as infusion sets, air check valves can prevent air from entering the infusion tube, avoid serious consequences such as air embolism, and ensure the medical safety of patients.

Vacuum system: installed at the inlet of the vacuum pump to prevent atmospheric backflow into the vacuum equipment, protect the normal operation of the vacuum system, and maintain the stability of the vacuum environment.

Key selection points

Caliber selection: Determine the caliber of the check valve based on the diameter of the pipeline and actual flow requirements to ensure that the valve can meet the ventilation or flow requirements of the system and avoid throttling.

Pressure level: Considering the working pressure of the system, select a check valve that can withstand the corresponding pressure to ensure the safety and reliability of the valve, and prevent leakage or damage in high-pressure environments.

Material requirements: Choose the appropriate material according to the different usage environments. In environments with acidic and alkaline corrosive gases, check valves made of stainless steel or corrosion-resistant plastic materials should be selected; In high-temperature environments, check valves made of high-temperature resistant materials should be selected.

Connection method: Common connection methods include flange connection, threaded connection, welding connection, etc. Choose the appropriate connection form according to the pipeline connection method and installation requirements to ensure firm installation and reliable sealing.