Introduction to the principle and application of waterproof and breathable valve

The waterproof and breathable valve is a waterproof and breathable membrane combined with plastic, metal, silica gel and other materials through injection molding, ultrasonic welding, interference fit and other forms to form an airtight installation part. There are mainly threaded, buckle-type, plug-type and other waterproof and breathable valves. The main performance indicators of the waterproof and breathable valve include air flow and protection level.
The waterproof and breathable valve is integrally formed to achieve good waterproof performance, and quickly restores ventilation after leaving the liquid. The interference fit between the cover and the body solves the problem of the cover falling off. The cover is thin and the body is thick. Risk of twisting the column. The groove design ensures that the O-ring does not overflow, maintains air pressure balance, prevents expansion gas from attacking weak links, prevents cracks and deformation, and prolongs the life of the shell; maintains humidity balance, discharges moisture, relieves fogging and condensation, Protect the inner parts of the shell, prolong the life of the shell parts; prevent the failure of electronic and inductive products caused by salt and water corrosion, and protect sensitive electronic and inductive products.

Waterproof and breathable valves are widely used in the automotive lighting industry. Vehicles will encounter different weather and road conditions during transportation, and the lights are always exposed to the external environment. Dust, rain, snow, road debris and mud will all affect the lighting of the lights, thereby affecting the safety of the vehicle during driving. A sudden drop in external temperature will lead to a drop in internal pressure, making it easy for the equipment to absorb pollutants and increase fogging, resulting in lamp failure. The waterproof and breathable valve can provide long-lasting protection to the lights from the intrusion of external water vapor, dust, oil and other dirt. At the same time, the unique ventilation function of the product can exchange gas with the change of pressure, thereby reducing the pressure on the seal and prolonging the service life of the product.

1. Reduce the fogging of the headlights. Effective ventilation can greatly reduce the fogging. The general installation method reduces the complexity of the product design. The performance is reliable and the test cost is reduced.

2. The pressure balance of taillights, fog lights and auxiliary lights, the superior performance and unique design of the automobile waterproof and breathable valve allow you to save money in every link of manufacturing: the cost of sealing design is reduced, and the material used for the shell is reduced, thereby reducing Tooling Design and Cost Breathable design does not build up pressure and can be cured in place with sealants and adhesives, reducing assembly time for reliable performance over the life of the product.