NEWS

When refilling a Positive Pressure Air Breathing Apparatus, operate according to the standard procedures to ensure safety and the cylinder's integrity. Cylinder refilling must only be performed by personnel who have been professionally trained and certified.

I. Basic Requirements

Gas Quality: Must inflate with clean, dry, compressed air that meets breathing air standards for human respiration.

Strictly Prohibited Actions: It is strictly prohibited to fill with any other gas (such as oxygen, nitrogen) or liquid. Moist air can cause corrosion of the cylinder liner, compromising its service life and safety.

II. Operating Steps

Step 1: Safe Connection & Initial Inflation

Implement safety precautions (e.g., wear safety goggles).

Securely connect the inflation adapter to the cylinder valve.

Remark: The cylinder valve has two specifications,the one has a outlet thread of w21.8*1/4, the other one has an inner thread of M22*1.5 or G5/8’’.

Slowly open the cylinder valve and begin inflation until the rated working pressure (30 MPa) is reached.

Step 2: Cooling & Pressure Compensation

Important Note: High-pressure inflation will cause the cylinder temperature to rise significantly.

After inflation, the cylinder must be allowed to sit and cool down naturally to ambient temperature.

After cooling, the internal pressure will drop due to thermal contraction (usually to between 27 - 30 MPa). At this point, reconnect and top up the pressure to the full 30 MPa rated working pressure.

Step 3: Ending Inflation & Leak Check

Once the rated pressure is reached, close the cylinder valve and then the inflation source valve.

Vent (bleed off) any residual pressure from the inflation hose.

Disconnect the cylinder from the inflation equipment.

Leak Check: Apply a leak detection solution (e.g., soapy water) to the cylinder neck threads and cylinder valve connections. Check for bubble formation to confirm there are no leaks.

Step 4: Storage & Identification

Clearly mark all inflated cylinders as "FULL" immediately after filling.

Store them properly on a dedicated rack or install them onto the backplate.

Storage Prohibitions: Never store near a heat source (e.g., fire, heater) or expose to direct sunlight for prolonged periods.

The apparatus shall be periodical checked and once a mouth at least and write down the checking result to ensure the breathing apparatus in good state.

The steel air cylinder shall be checked once at least for three year, and the carbon fiber air cylinder shall be checked once at least for five year, if the damage and corrosion or other defects which influence the safety of the cylinder are discovered, it shall be carefully tested in time.

Special Warning

Never Use Water for Cooling or Leak Checks: Cylinders must never be immersed in water for cooling, leak testing, or storage! Introducing moisture into the cylinder can cause severe internal corrosion, leading to cylinder condemnation and potentially creating a safety hazard.