The corrugated flame retardant layer should be removed regularly and cleaned within 3 to 6 months to ensure that every hole in the flame retardant layer is unobstructed to prevent blockage and ensure safe and normal use.
2. Check regularly for elasticity of the positive and negative disc, damage to the guide rod and disc in contact with the seal. If there is any damage, it should be replaced immediately.
3. During inspection and maintenance reinstallation, the joint surface in the valve should be closely matched and the disc can be lifted and lifted flexibly.
4. When the new valve starts, remove the vibration resistance between the valves before installation, otherwise the breathing valve will fail.