waterproof ventilation valve iswaterproof breathable membranethrough injection molding,ultrasonic welding andother forms and plastic, metal, silica gel and other materials, forming can be sealed installation parts. Under normalconditions, the rise of the external ambient air temperature leads to the increase of the internal air pressure of thesealed cavity, and the air flows outward. On the contrary,when the external ambient air temperature decreases, theinternal air pressure of the sealed cavity decreases, and the air enters the cavity. At the same time, the pressurerelief valve is built with expanded polytetraffuoroethylene (E-PTFE) microporous membrane assembly,which is dust-proof, waterproof, dirt-proof, oil-proof and particle-proof.

waterproof permeable valve is carefully manufactured by using imported expanded polytetraffuoroethylene (E-PTFE)microporous membrane. The microporous diameter of the imported E-PTFE membrane is between 0.1-10um,whilethe gas molecule is only about 0.0004um. The pore diameter of EPTFE membrane is250-25000 times larger than
the gas diameter, so the gas can pass smoothly.drizzle is 400 pum, which is 40-4000 times larger than the diameter of micropores of the film. In addition, due to thelow surface energy of EPTFE film material and the contact angle of 135.6, water vapor condenses into small waterdroplets on the surface of EPTFE film due to surface tension (water molecules pull each other), which can effectivelyprevent liquid water from wetting and capillary penetration,thus having good waterproof and breathableperfommance
waterproof ventilation valve:
1, waterproof, dustproof, anti-oil, protection level reached IP6K9K.2, chemical resistance, high and low temperature resistance, anti-aging, etc.,to improve the reliability of products inharsh environments.
3. The shell material is made of common plastic and metal materials, which can be installed quickly and reliably(welded breathable membrane,adhesive breathable membrane,threaded waterproof breathable valve).4, universal installation reduces the complexity of the design, making product development faster and more cost-
effective.Shangda SDA waterproof breathable valve has been widely used in LED outdoor lighting industry, automobilemanufacturing industry, solar photovoltaic industry,electronic and electrical industry, communication equipmentindustry, security equipment industry, etc.
Shangda SDA waterproof and breathable products provide the best protection solutions for applications in various
industries and solve problems for you.