wafer butterfly valves with notch on the body

BV4000W is Wafer Butterfly valve and we call it industry valve. The size is for 2"(DN50) to 14" ( DN350). It is with soft/back-up seat and double D or TD type disc without pin. Valve can be mounted with handles (2" to 12"),Manual Gear Operators (2" to 14",)and electric or pneumatic actuators (2" to 14") Face to face dimension are available in GB 12238 BS5155 API609, MSS SP-76,DIN 3202-K1 (ISO 5762 T5). Flange Drilling are GB9112-88,DIN2501,BS4504,ISO2084,ISO2531,BS10-E,ANSI125/150,ASA125/150,AS2129 Table D/E. Valve tested: API598 Safe working pressure: PN6,10,16. Butterfly valves are the most specified type of valves used for moderate-duty conditions in pipe sizes of two and larger than two inches. With the advantage of reduced weight, reliable bubble-tight shut-off, ease of operation and automation, the butterfly valves are used to replace gate valves in traditional applications. Bi-directions shut-off is one of the hallmarks of butterfly valves. Owing to the Continuing development of butterfly valves' technology, butterfly valves made-in-China are used more and more in aggressive applications that previously were the exclusive domain of gate and globe valves.