What is the function of the check valve in a boiler system?

The primary function of a check valve in a boiler system is to prevent backflow of water. This is critical in maintaining the proper flow direction of fluids within the system. Check valves automatically close when there is a reverse flow condition, thereby ensuring that water or steam does not travel back into the system from which it has come. This is particularly important in boiler operations, where backflow could lead to water hammer, contamination, or damage to essential components.

While other components in a boiler system handle tasks like regulating water pressure or allowing for blowdown operations, the specific role of the check valve is exclusively centered around maintaining a one-way flow and protecting the system from potentially hazardous conditions created by backflow.