An all-plastic diaphragm type one-way exhaust check valve with emergency ventilation function
A technology of one-way exhaust and check valve, which is applied in the field of protective clothing safety, can solve problems such as hidden dangers, reduced strength, and reduced sealing performance, and achieve the effects of enhanced reliability, low cost, and simple and reliable structure
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[0042] Such as Figure 1 to Figure 10 As shown, an all-plastic diaphragm type one-way exhaust check valve with emergency ventilation function includes a valve body 1, and an annular fixing plate 2 is arranged inside the valve body 1, and the annular fixing plate 2 forms the first valve plate for installation. Cavity 3, the ring-shaped fixing plate 2 and the frame of the valve body form a gas purification component installation cavity 4, the side of the valve body 1 is provided with an external buckle fastener 5, and the external buckle fastener 5 is provided with an exhaust port 6 , the annular fixing plate 2 is provided with a through hole 7 communicating with the gas purification component installation cavity 4, and the first gas purification component 8 is installed in the gas purification component installation cavity 4;
[0043] One side of the valve body 1 is open and the other side is sealed, and the side of the opening of the valve body 1 is sealed and connected with t...
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