What is the ASME code requirement if a boiler has only one low water cutoff?

In the context of boiler safety, the ASME (American Society of Mechanical Engineers) code stipulates that if a boiler is equipped with only one low water cutoff, it is required to be manually reset. A manually reset low water cutoff ensures that in the event of low water conditions, the operator must take explicit action to restore the system to operation. This requirement is crucial because it minimizes the risk of the boiler operating under unsafe conditions without sufficient water, which could lead to overheating and potential boiler failure or explosions.

Having a manual reset feature is a safeguard that ensures operators are attentive to the system's status and take necessary measures before restarting, thus reinforcing operational safety. An automatic reset could lead to a scenario where the boiler might inadvertently restart without ensuring safe water levels, potentially posing significant safety hazards.

While automated or digital systems could enhance monitoring and operation of boilers, the key focus here is on the safety mechanism associated with low water conditions, which is strictly governed by the requirement for manual intervention in systems with a single cutoff.