LALAGO Ø 150 mm check valve with rubber seal, automatic check valve with rubber seal, connection piece for ventilation duct and air outlet

Unidirectional passage: Two semicircular windshields open and close automatically, leaving only a single passage, so that the air flow can only circulate in one direction, preventing air from returning into the ventilation ducts, resulting in a backflow and ensuring effective air circulation.Unidirectional airflow prevention: If the internal pressure is lower than the outer pressure, the air flow can no longer penetrate and the air window closes automatically, effectively preventing the penetration of external noises, birds, rats, rain and insects. For optimal closure, the wind deflector must be positioned horizontally.Rubber seal: The inner rubber sealing ring not only provides a better seal for the operation of the check valve, but also reduces noise during operation and makes the check valve durable.【Easy to install】: When you install the check valve, you need to press it into the ventilation tube to make it move as far as possible. If the valve is installed horizontally, the spring should be positioned horizontally so that the valve can open and close optimally. The same applies to vertical installation.Wide range of applications: the valve is designed for use in all supply and exhaust systems such as air conditioners, dryers, extractor hoods and ventilation systems. This check valve can be used in flexible or inflexible ventilation ducts.