Powder hopper dedicated manual butterfly powder hopper dedicated manual butterfly valves with long life metal sealing valves generally than the elastic seal, but it is difficult to completely seal. Metal seal can adapt to higher operating temperature, flexible seal is restricted by temperature defects. If you require the use of flow control valve as the main choice is the right size and type of valve. Butterfly structure principle is particularly suitable for the production of large diameter valves. Butterfly not only widely used in the oil, gas, chemical, water treatment and other general industries, but also for the thermal power plant cooling water system. Powder hopper dedicated manual butterfly valve industry-specific characteristics of high temperature, higher pressure range, the valve nominal diameter large, carbon steel valve body, valve plate seal with a metal ring to replace the rubber ring. Large temperature valve welded steel plate manufacturing, mainly for duct smoke and gas pipelines hot medium.