Why is it important to ensure the valve on a new oxygen cylinder is cracked open before installation?

The importance of cracking open the valve on a new oxygen cylinder before installation is primarily related to safety and cleanliness. By slightly opening the valve, any debris, grease, or dust that may have accumulated on the cylinder's opening can be expelled. This action helps to ensure that the oxygen delivered through the regulator and tubing remains uncontaminated and safe for use. Maintaining a clean environment for oxygen delivery is crucial, as contamination can lead to dangerous reactions, particularly since oxygen is highly flammable.

While checking for leaks, ensuring the cylinder is full, and measuring the contents are also important practices in handling oxygen cylinders, cracking open the cylinder valve specifically addresses the immediate need to maintain cleanliness and safety before connecting the regulator and using the cylinder.