Stem diameter: Bright bar for multi-turn valves. It can not be assembled into electric valve. Therefore, electric butterfly valve flange, if the electric valve device allows the maximum stem diameter can not be dispensed through the valve stem. The inner diameter of the hollow output shaft of the electric system must be greater than the next shot the valve stem diameter. The local rotary valves and valves in the dark bar pneumatic seal butterfly valves, although without considering the adoption of stem diameter problem, but should be fully considered when matching stem diameter and keyway size butterfly that can be assembled multi-turn working properly. Butterfly Valve Wafer type butterfly valve plate mounted on the pipe diameter direction. The valve was fully open state. Simple clip-on butterfly structure, small size and light weight. Butterfly resilient metal seal two kinds of seals and seal type. Elastic sealing valve on the clip-on electric butterfly valve seals can be mounted on or attached to the disc periphery. Flanged butterfly valve flanged vertical plate structure, the stem is integral metal seal valve seals for flexible graphite plate and stainless steel composite structure, mounted on the body, disc sealing surface of stainless steel. Soft seal valve seals for nitrile rubber material, is installed in the butterfly plate. Clip-on electric butterfly valve _ _ nanxiong Ming Ming Port valve provided by the Port Valve Co., Ltd., Dongguan. Port Valve Co., Ltd., Dongguan Ming (www.gdmgfm.com) strong, credible, butterfly and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the next port of the valve and you hand into the brilliant, for a better future!