What is the function of the fail safe valve in an HTST flow diversion device?

The function of the fail safe valve in an HTST (High-Temperature Short-Time) flow diversion device is crucial for maintaining the safety and efficiency of the pasteurization process. When there is a loss of air pressure or power, the fail safe valve is designed to automatically switch to the diverted position. This action helps ensure that any milk or liquid that has not reached the required pasteurization temperature does not enter the consumer product line, thereby preventing unsafe products from being distributed.

In an HTST system, the flow diversion device is integral to ensuring that the pasteurization process is effective. If there is any malfunction—such as a drop in air pressure which might affect the operation of the device—the fail safe valve acts quickly to safeguard public health. By defaulting to the diverted position, the valve effectively isolates the untreated product, thus preventing contamination and ensuring compliance with safety standards for pasteurized products.

The role of the fail safe valve is not focused on maintaining forward flow continuously nor does it monitor pasteurization temperatures. While it plays a part in preventing contamination, the primary and most critical function is to respond to failures in a way that protects against the escape of inadequately pasteurized product.