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The NABIC 500 high lift safety valve is ideal for unvented hot water heating systems needing high-capacity steam relief. All wetted parts are made from materials resistant to dezincification, ensuring durability. It meets BS EN ISO 4126-1 standards and is WRAS approved. The valve features a resilient PTFE seating design, offering excellent seat tightness. It has a locked and sealed pressure setting for added safety. The valve allows for easy inspection and cleaning, boasts a high discharge capacity, and has diaphragm-protected parts. It is available in a size of x and can include a Packlock that complies with M&E3. Additionally, a Viton seat design is available. This valve is reliable, efficient, and perfect for critical heating system applications.. Nabic 1/2 inch 500 High Lift Safety Valve - 4.0 Bar Brass N-500-015-4