Double tank breather valve, can be used in construction, mining and other industrial fields

[Product maintenance]: 1. The main body mask is washed and dried with warm water, and it is not suitable to be exposed to the Sun; 2. Masks and canister should be stored in clean and dry places with suitable temperature, suitable temperature-20 ℃ ~ +45 ℃, and the storage period is 3 years. 3. When the mask is used, wash it with warm water below 30℃ or wipe it clean with alcohol. Place it in a ventilated, dry environment with a temperature of 0 ~ 35℃, and do not bake it with fire, exposed to the sun. Do not put together with acid and alkali and other toxic substances. Maintenance: 1. Replace with a new canister. This shop is available for sale. Just screw it off at canister to prevent gas from bias current. After installation, tighten the lid of the box and gently shake canister by hand, so that the friction sound in the box cannot be heard. 2. Masks and poison filters should be stored in clean and dry places with appropriate temperature. 3. There is no specific replacement time for filter box. You need to feel that the air is not fresh according to the specific working environment and move away from the working area to replace filter box immediately.