Electric butterfly valves are electric and electric control valve of a species. Electric butterfly valve connections are: flanged and wafer type; electric butterfly valve in the form are: rubber seal and metal seal. Electric butterfly valve control signals through the power switch. The product can be used as pipeline system shut-off valve, control valves and check valves. Comes with manual control device, in the event of a power failure, you can temporarily use manual operation, and will not affect use.