Which safety device is typically found in steam systems?

The check valve is an essential safety device in steam systems because it allows steam to flow in one direction while preventing backflow. This function is crucial for maintaining system integrity and safety. When steam is generated in a boiler, it is directed through the piping system to where it is needed, such as in heating processes or turbines. If steam were to flow backward, it could lead to conditions such as water hammer, potential equipment damage, or even dangerous situations where pressure could build up in unintended areas.

In contrast, while pressure gauges and temperature gauges are important for monitoring the operation of a steam system, they do not actively prevent unsafe conditions themselves. The water column or glass is primarily used for indicating the water level in a boiler rather than serving as a direct safety device against pressure-related hazards. Thus, the check valve's primary function in preventing backflow directly contributes to the overall safety and operational reliability of the steam system.