In central supply systems using gas cylinders, what component is installed at each cylinder connection to prevent gas loss in case of damage?

In central supply systems utilizing gas cylinders, the component that is specifically designed to prevent gas loss in the event of damage is the check valve. A check valve is a crucial safety feature that allows gas to flow in one direction while preventing backflow or leakage when there is a breach or failure in the system.

By ensuring that gas cannot escape from a damaged cylinder or connection, the check valve plays a vital role in maintaining safety and integrity within medical gas systems. This is particularly important in healthcare settings where consistent gas supply is critical for patient care, as it prevents the risk of gas leaks which could lead to hazardous situations.

Other components, such as pressure gauges, isolation valves, and alarm systems, serve different functions. A pressure gauge measures the pressure within the system, providing important operational information. An isolation valve allows for the manual shut-off of gas supply when maintenance or repairs are needed, but it does not inherently stop gas loss from damage. Alarm systems are designed to alert staff to issues within the gas supply, but they do not physically prevent gas from escaping. Thus, the check valve is the correct choice for the specific function of preventing gas loss in case of damage.