This replacement valve head for a 6-port Injection & Switching Gas Chromatography Diaphragm Valve is engineered for long-lasting performance. The valve head is constructed with high-grade 316L stainless steel for exceptional durability and is certified leak tight up to 500 psi at 100°C for low temperature and 180°C for medium temperature. Valve heads work with AFP ELDV/MDVG 6-port Series Valves.