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The Nabic 542 safety valve is highly versatile, suitable for hot water, steam, or air systems. It is primarily designed for hot water boiler protection but is excellent as a general-purpose safety valve. The valve's design ensures easy inspection and cleaning. It features a drain plug for sizes DN40 and above, and the resilient PTFE seating guarantees a high degree of seat tightness. This makes the Nabic 542 an ideal choice for various applications. The specific model is a 1-inch size with a safety rating of 3.1 Bar, perfect for multiple safety needs in different environments.. Nabic 1 inch 542 Safety Valve - 3.1 Bar Brass NAB54202531