The difference between hard-sealed butterfly valve and soft-sealed butterfly valve is mainly reflected in structure, temperature resistance, pressure and sealing performance. In the temperature resistance comparison, soft seal is used in normal temperature environment, and hard seal can be used in low temperature, normal temperature, high temperature and other environments. Therefore, the application scope of hard-sealed butterfly valve is also relatively wide, and the application scope includes pipelines for conveying various corrosive and non-corrosive fluid media in furnaces, coal gas, steam, natural gas, city gas, hot and cold air, chemical smelting projects and power generation environmental protection systems.
What is the difference between hard-sealed butterfly valves and soft-sealed butterfly valves?
If butterfly valves are divided according to the sealing form, they can be divided into metal hard seals and rubber soft seals. Let's take a look at the difference between hard-sealed butterfly valves and soft-sealed butterfly valves?
1. Structure: Soft-sealed butterfly valves are mostly mid-line type hard seals are mostly single eccentric, double eccentric, and triple eccentric butterfly valves.
2. Temperature resistance: Soft seals are used in normal temperature environments, and hard seals can be used in low temperature, normal temperature, high temperature and other environments.
3. Pressure: Soft seals are low pressure-normal pressure, and hard seals can also be used for medium and high pressure working conditions such as pneumatic soft seal butterfly valves.
4. Sealing performance: Soft seals and three-eccentric hard seal butterfly valves have better sealing performance, and three-eccentric butterfly valves can maintain good sealing under high pressure and high temperature environments.
What is the scope of application of hard-sealed butterfly valves?
Hard-sealed butterfly valves, also known as flap valves, are a simple regulating valve that can also be used for the on-off control of low-pressure pipeline media. Hard-sealed butterfly valves mainly play a role in cutting off and throttling on pipelines. The butterfly valve opening and closing part is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulating. So what is the scope of application of hard-sealed butterfly valves?
Hard-sealed butterfly valves are suitable for pipelines that transport various corrosive and non-corrosive fluid media in generators, coal gas, steam, natural gas, city gas, hot and cold air, chemical smelting projects, and power generation and environmental protection systems. They are used to regulate and cut off the flow of media. Hard-sealed butterfly valves can be divided into manual hard-sealed butterfly valves, pneumatic hard-sealed butterfly valves, and electric hard-sealed butterfly valves.