Worm wheel expansion metal seal butterfly valve

Model: SD343H
Nominal diameter: DN50~3000?
Nominal pressure: PN0.6~4.0MPa
Applicable temperature: =425?
Material:carbon steel, stainless steel, etc.
Medium:water, steam, gas
¦ Summarize
It concentrates some function of flange butterfly and pipe expansion joint. So it not only can cut-off flow, but also can solve internal force elimination which caused by difference in temperature, that is expansion effect. It is applied to adjust and cut-off medium in electric power, metallurgy, petroleum, chemical, coal gas, city heating, water and electricity paper making, light textile, medicine, food, water supply and drainage, energy, all non-caustic gas, liquid, semiliquid, solid power pipe and container. It can be installed in any place and can’t be influenced by medium and flow direction. It can also adjust two flange distance when install the valve.  

Worm wheel expansion metal seal butterfly valve