The structural differences between soft sealed butterfly valves and hard sealed butterfly valves
The main structural differences are as follows:
1. Structural differences
Soft sealed butterfly valves are mostly of the medium line type, while hard sealed butterfly valves are mostly of the single eccentric, double eccentric, or triple eccentric types.
2. Temperature resistance
Soft seals are used in ambient temperature environments. Hard seals can be used in environments such as low temperature, room temperature, and high temperature.
3. Pressure
Soft seal low-pressure normal pressure, hard seal can also be used in medium high pressure and other working conditions.
4. Sealing performance
Soft sealed and triple eccentric hard sealed butterfly valves have better sealing performance
The three eccentric butterfly valve can maintain good sealing in high-pressure and high-temperature environments.
Given the above characteristics, soft sealed butterfly valves are suitable for bidirectional opening, closing, and regulation of ventilation and dust removal pipelines in industries such as water treatment, light industry, petroleum, and chemical. Hard sealed butterfly valves are commonly used for heating, gas supply, gas, oil, acid and alkali environments.
With the widespread use of butterfly valves, their characteristics of easy installation, convenient maintenance, and simple structure have become increasingly evident. Electric soft seal butterfly valves, pneumatic soft seal butterfly valves, hard seal butterfly valves, etc. are beginning to replace electric gate valves, globe valves, etc. in more and more occasions.
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