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The NABIC 500 high lift safety valve is designed for unvented hot water heating systems needing high-capacity emergency steam relief. All wetted parts are made from dezincification-resistant materials. This valve meets BS EN ISO 4126-1 standards and is WRAS approved for pressures of 1 bar and above. It features a resilient PTFE seating design for tight seals and easy inspection and cleaning. Diaphragm-protected parts and a locked and sealed pressure setting ensure reliability. With a high discharge capacity, it also includes a drain plug and is sized at 1 x 2. It is compatible with Viton seat designs and offers a padlock option, complying with M&E3 standards.. Nabic 1 1/2 inch 500 High Lift Safety Valve - 8.0 Bar Brass N-500-040-8