How should the oxygen valve on the POB be turned to close it?

To properly close the oxygen valve on a Portable Oxygen Bottle (POB), the correct method is to turn the valve clockwise. This action effectively seals the valve, preventing any oxygen from leaking out.

In many mechanical devices, including gas valves, turning them clockwise typically results in a closing motion. Understanding this mechanical principle is critical, especially in emergency situations where oxygen delivery needs to be controlled precisely.

Other remedies available, such as fastening tightly or simply pulling off the valve, do not provide the correct method. In particular, simply pulling off a valve could damage the equipment or create a hazardous situation by releasing oxygen unexpectedly. Thus, it is vital to remember that closing the valve is done by turning it clockwise to ensure safe and effective use of the oxygen supply.