What are the structural differences between hard sealed butterfly valves and soft sealed butterfly valves?

What are the structural differences between hard sealed butterfly valves and soft sealed butterfly valves

1、 Structural differences: Soft sealed butterfly valves are mostly medium line butterfly valves, while hard sealed butterfly valves are mostly single eccentric butterfly valves, double eccentric butterfly valves, and triple eccentric butterfly valves

2、 Temperature resistance: Soft sealing is used in normal 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 butterfly valves and triple eccentric hard sealed butterfly valves have better sealing performance, and triple eccentric butterfly valves 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 are obvious. 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