Pneumatic membrane regulating butterfly valve is a kind of rotary type pneumatic sanitary regulating valve.
Its features: small size, light weight, big rated flow coefficient and other advantages. It’s especially suitable for regulation of large diameter, large flow, thick mud or boiler kiln flue gas.
There’re standard type, high-temperature type and sealed type for this type of butterfly valve.
The way to use side mounted hand wheel when switching from pneumatic mode to manual mode: pull out the positioning pin, pull up the handle to make the worm gear and worm stem mesh, press the positioning pin and turn the hand wheel to change the section of flow. When switching from manual mode to pneumatic mode, just pull the handle.