Due to the wide use and practicability of waterproof and breathable valves, there are many kinds of waterproof andbreathable valves on the market at present. However,the main function of waterproof and breathable valves is stilmade of waterproof materials,and they have good airtightness and permeability. Plastic, metal,silica gel and othermaterials can be combined to form many various components with good airtightness. Therefore, there are manykinds of waterproof and breathable valves on the market at present,among them, press type,snap type and threadtype waterproof ventilation valve is given priority to, so how to choose in so many waterproof ventilation valve?Generally speaking, the selection of waterproof ventilation valve is mainly based on the working environment of thewaterproof ventilation valve. Although the structure of the waterproof ventilation valve is mainly made of waterproofmaterials,there are still differences in model and configuration. Therefore,the selection of waterproof ventilationvalve should be carried out according to the working environment. Moreover,the waterproof ventilation valve hasgood sealing and permeability,which can ensure the free exchange of internal and external gases, but cannot allowliquid objects to pass through,therefore,the choice of waterproof ventilation valve should also be selected accordingto the amount of ventilation and waterproof level.will be based on the appearance of the product or appliance for waterproof ventilation valve selection, generallychoose the corresponding color or match the appropriate color to combine, and the current choice is usually the mostlong-life aluminum waterproof ventilation valve or stainless steel waterproof ventilation valve.The appropriate specifications will also be selected according to the function of the product itself and the workingenvironment. For example, if the waterproof ventilation valve acts on outdoor lamps or car headlights, plasticwaterproof ventilation valve is usually selected for protection. If there is a little error in thickness, it can also becustomized according to the needs of users.

Shangda’s waterproof breathable valve, waterproof breathable membrane,explosion-proof pressure reliefvalve and other products can reach the national standard of waterproof grade.Our company’s waterproof and breathable products have been tested as follows:Corrosive gas test, salt spray test,temperature test,flame retardant anti-ultraviolet test, continuous salt spray test,humidity test, protection level test
Shangda waterproof and breathable products are:
1. Waterproof breathable valve has the advantages of high strength sealing, firm structure, convenient installation,wear resistance and corrosion resistance, waterproof breathable balance pressure difference, dustproof andantifouling, anti-condensation fog and anti-oil.
2. The advantages of explosion-proof pressure relief valve are: dual-channel spring pressure relief, safe andrepeatable detection, fast charging design, high protection service life,easy installation of general parts, highcorrosion resistance.
3. The advantages of waterproof breathable membrane are: high-performance eptfe membrane has high particlecapture rate,large flow rate when inlet pressure is low to adjust water, waterproof breathable can dissipate heat andbalance pressure in micro environment, and has chemical resistance and inertness.