The Difference of Butterfly Valve between Hard Seal and Soft Seal
Butterfly valve is a kind of valve commonly used in the industry, which can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting and throttling on the pipeline. According to the sealing surface, it is divided into soft sealing butterfly valve and hard sealing butterfly valve.You may be wondering, which one is better? Today we will reveal the secrets to you all.
The differences are as follows:
Soft-seal butterfly valves are mostly mid-line butterfly valves, and hard-seal butterfly valves are mostly single-eccentric butterfly valves, double-eccentric butterfly valves, and triple-eccentric butterfly valves.
Soft seals are used in normal temperature environments. Hard seal can be used in low temperature, normal temperature, high temperature and other environments.
Soft seal butterfly valve: low pressure – normal pressure; hard seal butterfly valve can also be used in medium and high pressure conditions.
Soft sealing butterfly valve and triple eccentric hard sealing butterfly valve have better sealing performance, and triple eccentric butterfly valve can maintain a good seal in high temperature and high pressure environment.
In view of the above characteristics, the soft sealing butterfly valve is suitable for the two-way opening and closing and adjustment of ventilation and dust removal pipelines, water treatment, light industry, petroleum, chemical and other industries. Hard-sealed butterfly valves are mostly used in heating, gas, and gas, oil, acid and alkali environments.
After reading this, do you know how to choose the right butterfly valve?