2. Select according to the protection level of the vent valve
Considering to the effect of waterproof and dustproof, the air vent valve is not the larger the air permeability is, the better it works. Generally speaking, the products that need to use the air vent valve can reach the protection level of IP65 to IP68. Here we suggest to choose the air vent valve with the protection level of IP67 to IP68, because the protection concept of IP65 is that there is no water in the spray, while IP67 can withstand certain water pressure. Assuming that the equipment in the outdoor rain, with the change of temperature, there will be negative pressure in a short time, which is equivalent to requiring the equipment to withstand certain water pressure.
Shanghai Pinji Electronic Technology Co., LTD. is one of the professional wiring equipment enterprises that engage in development, design, manufacturing, sales and service. Products range: junction box series, nylon cable gland series, metal cable gland series, air vent valve series, corrugated conduit series, watertight corrugated tube fitting series, quick connector series, rubber series etc. At present, the company has obtained CE, UL, TUV, IP67 waterproof and other certification certified by EU system. Our products are designed and tested to meet a wide range of applications, even under the most severe conditions.