... wafer or lug butterfly valve, with various rubber seats, EPDM,NBR,VITON,PTFE,etc. very convenient Butterfly Val Rubber Butterfly ValveA/LT type ... of materials, applicable to various mediums8.Various of rubber seats, such as Natural Rubber, Hypalon, EPDM, Neoprene, NBR, Viton, PTFE, Polyurethane.etc ... , AS2129 Table D & E, BS4504,BS10D&E,JIS10K. Lug Type Rubber Lined Butterfly Valve