What is the suggested configuration for valves installed on high pressure steam boilers?

The suggested configuration for valves installed on high pressure steam boilers typically involves the use of two outside-screw-and-yoke (OS&Y) valves primarily for safety and operational reliability. Outside-screw-and-yoke valves are designed to provide a clear visual indication of whether the valve is open or closed, making them a standard choice for this application. This dual-valve setup allows for one valve to be used for boiler operation while the other acts as a backup; this redundancy is crucial in high-pressure environments where safety is paramount.

Additionally, having two OS&Y valves enables easier maintenance, as one valve can be serviced without disrupting the operation of the other. In high-pressure steam systems, the integrity and reliability of the valves are critical due to the potential for severe consequences in the event of a failure. Thus, the use of two OS&Y valves aligns with industry practices aimed at ensuring maximum safety and functionality in high-pressure steam boiler operations.