Dual Plate Check Valve D6 series dual plate check valve, in strict accordance with the relevant product standards, in line with EN ISO 9001 standards. Can be installed horizontally or vertically. Product Description: D6 series dual plate check valve, in strict accordance with the relevant product standards, in line with EN ISO 9001 standards. Can be installed horizontally or vertically. There are two main types: 06-M6.4> Valve body made of cast iron, suitable for heating, air conditioning systems, water treatment, water supply, pumping stations and industrial systems. 06-M6.6> CM8M stainless steel body, in addition to D6.0 applications, can also be used in chemical systems. Diameter: DN40-600