The solution to the problem of leakage of self-rescuer

Life experience tells us that self-rescuers, air respirators, and oxygen breathing apparatus are essential respiratory protection equipment designed to safeguard the human respiratory system from harmful gases in the environment. These devices are crucial in emergency situations where the air quality is compromised.

When a breathing apparatus fails to supply sufficient oxygen, it can lead to various hypoxic conditions, which may endanger health or even life. In this article, we will focus on the repair and maintenance of self-rescuers, particularly addressing issues related to air leakage. Before starting any repair, it is important to prepare a dedicated repair area of about 10 square meters. The room should be dry, with an absolute humidity below 10g/m³—meaning at a temperature of 20°C, the relative humidity should not exceed 55%. Here’s how to perform a leak repair on a self-rescuer:

First, remove the protective cover of the self-rescuer. Take off the red wrench, carefully pull off the seal, and remove the front and rear sealing tapes along with the belt loop. Then, open the upper and lower shells of the device. Remove the old rubber ring from the upper housing's sealing groove and replace it with a new one. Apply a thin layer of silicone grease on the new rubber ring to prevent aging and ensure a better seal.

Next, place the upper shell back onto the lower shell, reattach the belt loop and sealing tapes, and install a new seal strip (preferably purchased from the original factory). Secure the front and rear sealing tapes, then conduct an airtightness test on the self-rescuer. If there is no air leakage, the seal strips should be soldered or spot-welded for long-term reliability.

The repair process should be quick and efficient. Each self-rescuer should not take more than 5 minutes to repair, as prolonged exposure to moisture can damage internal components and reduce effectiveness.

After the repair, the self-rescuer must be weighed to check for weight gain. A weight increase of no more than 10 grams is acceptable. If the weight gain exceeds 10 grams, the device should be discarded, as it may no longer provide adequate protection.

It is vital that repair technicians follow the proper procedures when maintaining these critical devices. Regular inspections and timely verification by the group company are necessary to ensure the reliability of the equipment. Failure to do so could lead to serious incidents such as gas leaks or other "one-pass and three-prevention" accidents, ultimately resulting in the failure of the self-rescuer during an emergency.

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