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The Nabic 542 safety valve offers exceptional versatility. It's suitable for hot water, steam, and air applications. Designed primarily for hot water boilers, it serves as an excellent general-purpose safety valve. The valve allows for easy inspection and cleaning. Models DN40 and above come with a fitted drain plug. Featuring a resilient PTFE seating design, it ensures a high degree of seat tightness. This valve combines reliability with flexibility, making it a top choice for various safety needs.. Nabic 1 inch 542 Safety Valve - 3.9 Bar Brass NAB54202539