Spring-loaded check valve 05 series valve cast iron body, in strict accordance with product standards, in line with EN ISO 9001 standards and 97/23/CE (PED) standards. Divided flange (DN250) and threaded connection (DN50-100) two kinds. Description: 05 Series valve cast iron body, in strict accordance with the relevant product standards, in line with EN ISO 9001 standards and 97/23/CE (PED) standards. Divided flange (DN250) and threaded connection (DN50-100) two kinds. Can be installed horizontally or vertically in the middle line, but also can use the end of the valve, the valve body and the valve plate is designed to reduce the flow disturbances and a good head loss. Scope: The valve can be used for heating, air conditioning, water supply, water treatment, pumping stations, agriculture and industrial systems. Using the media can also be compressed air, oils and hydrocarbons. Does not apply to steam system. Diameter: DN40-250