What type of valve allows water to enter a steam system?

The feed water valve is designed specifically to allow water to enter a steam system. Its primary function is to control the flow of water into the boiler or steam generator, ensuring that there is an adequate water supply for producing steam. The valve helps maintain the proper water level, which is critical for safe and efficient operation of the steam system.

In contrast, other types of valves serve different purposes. The main stop valve is used to isolate the entire system from the water supply, while the blowdown valve is utilized to remove sediment and impurities from the boiler water. The safety valve, on the other hand, is a critical safety device that opens to release pressure when it exceeds a predetermined level, preventing potential explosions or system failures. Thus, the feed water valve is the correct choice for allowing water entry into the steam system, highlighting its role in maintaining operational efficiency and safety.