Author:Site Editor Publish Time: 2019-01-09 Origin:Site
Butterfly valves are used in a wide range of applications and are suitable for flow regulation. Because the butterfly valve has a large pressure loss in the pipeline, it is about three times that of the gate valve. Therefore, when selecting a butterfly valve, the influence of the pressure loss of the piping system should be fully considered.
The robustness of the pressure of the disc medium under the closing and the limitation of the working temperature of the elastic valve seat material at high temperature should also be considered. The butterfly valve has a small structural length and overall height. It opens and closes the speed block and has good fluid control characteristics. Its structural principle is most suitable for making large diameter valves. When a butterfly valve is required for control flow, the most important thing is to properly select the size and type of butterfly valve so that he can work more efficiently.
Generally, in throttling, adjustment control, and mud media, the structural length is required to be short and the opening and closing speed is fast. For low pressure cut-off, butterfly valves are recommended.
1. In the double-position adjustment, shrinkage channel, low noise, cavitation and gasification phenomenon, a small amount of leakage to the atmosphere, with corrosive medium, butterfly valve can be selected.
2. In the case of special conditions, the throttling adjustment or the strict sealing, or the use of the butterfly valve under the conditions of severe wear and low temperature, the special eccentric or double offset butterfly valve of the special design metal sealing belt adjusting device is required.
3. Metal-to-metal surface sealing the triple offset butterfly valve can be widely used in the fields of petroleum, petrochemical, chemical, metallurgical, electric power, etc., in addition to being used as a large-scale pressure swing adsorption gas separation device program control valve. It is a replacement product for gate valve and globe valve.
4. The centerline butterfly valve is suitable for fresh water, sewage, seawater, salt water, steam, natural gas, food, medicine, oil and each that require complete sealing, zero gas leakage, high life expectancy and working temperature of -10-150 degrees. Kinds of acid and alkali and other pipelines.
5, metal-to-metal wire sealed double eccentric butterfly valve is suitable for urban heating, gas supply, water supply and gas, oil, acid and alkali pipelines, as a regulating and intercepting device.
6. Soft eccentric butterfly valve is suitable for two-way opening and closing and regulation of ventilation and dust removal pipelines. It is widely used in gas pipelines and waterways of metallurgy, light industry, electric power and petrochemical systems.