What is the function of a blowoff valve in a boiler?

The role of a blowoff valve in a boiler is primarily to remove accumulated sediment and sludge from the bottom of the boiler. Over time, impurities in the water can settle at the bottom, leading to problems such as decreased efficiency and potential damage to the boiler. By regularly opening the blowoff valve, operators can safely discharge this unwanted material, ensuring that the boiler operates efficiently and safely. This maintenance practice helps prolong the life of the boiler and maintain optimal performance.

The functionality of a blowoff valve does not extend to maintaining consistent pressure, regulating the flow of steam, or increasing heating efficiency; those tasks are typically managed by other components within the boiler system.