Y pattern globe valves are primarily used for:

Y pattern globe valves are specifically designed to handle fluids that are contaminated or viscous, and they are particularly effective for applications such as boiler blow off control. The unique shape of the Y pattern allows for a smoother flow path, reducing turbulence and potential blockages that can occur with thicker fluids. This characteristic makes them well-suited for managing the flow of fluids that contain particulates or have high viscosities.

In boiler applications, for example, managing the blow off effectively is crucial for maintaining performance and safety. The design of the Y pattern globe valve facilitates precise flow control while minimizing strength loss, making it an ideal choice for such scenarios. This precision is vital when dealing with viscous materials that require careful regulation to prevent operational issues in a steam system.

For other alternatives, high-pressure applications might not leverage the advantages of a Y pattern globe valve as effectively, and while water distribution does use valves, typically other valve types are preferred for efficiency in such applications. Gas service systems have their own specific requirements for functionality and safety, making option B the most accurate response regarding the primary use of Y pattern globe valves.