VFA series - butterfly valves with PN16 flanged connection from DN25 up to DN200 –   are used in heating, refrigerating, hydraulic plants for fluids belonging to group 2 according to the article 9 of 97/23/CE directive (PED), therefore, they cannot be used as safety valves. Group 2 regards water, overheated water, steam. 

    M3, M4 series - 3 or 4 way PN6 rotating shoe valve bodies with manual control lever and position indicator. M3 - M4 valves are used in heating plants. They have cast iron PN6 valve body and gas female threaded or flanged connections. All M3 - M4 valves can be motorized even if they are already mounted on field, with MDB.4 actuator by AM72.