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What is the difference between soft seal butterfly valve and hard seal butterfly valve

2018-08-09

The hard seal butterfly valve produced by Henan Shangwei Valve Co., Ltd. is divided into electric metal hard seal butterfly valve, manual metal hard seal butterfly valve, pneumatic hard seal butterfly valve, etc. The soft seal butterfly valve is divided into manual soft seal butterfly valve, electric soft seal butterfly valve, pneumatic soft seal butterfly valve, etc. An overview of the difference between soft and hard seal butterfly valves.

Soft sealing butterfly valve refers to the sealing surface on both sides of the test is a metal material, the other side is elastic non-metallic material is called soft seal, good sealing performance, not high temperature and easy to wear, mechanical poor. It belongs to line seal, suitable for working bad environment of fluid for pure oil, gas, water, smaller caliber. Integral butterfly plate. U-shaped sealing ring, placed on the valve body and fixed by the gland on the valve body

Multi-level hard seal refers to the sealing surface on both sides of the metal material or other hard material is called hard seal, sealing performance is poor, high temperature and wear-resistant mechanical properties, suitable for pure or containing impurities of oil, gas, water, can do a lot of caliber. Stepped butterfly plate, which is used to place the butterfly valve seat and valve seat gland. Multi-level sealing ring, placed on the butterfly plate, fixed by the gland on the butterfly plate.

1. The difference in structure: soft seal butterfly valve is mostly centerline type hard seal is mostly single eccentric, double eccentric, triple eccentric butterfly valve

2. Temperature resistance: soft sealing is used in normal temperature environment. Hard seal can be used in low temperature, normal temperature, high temperature and other environments

3. Pressure: soft seal low pressure-normal pressure, hard seal can also be used in medium and high pressure and other working conditions

4, sealing performance: soft seal and three eccentric hard seal butterfly valve sealing performance is better, three eccentric butterfly valve in high pressure and high temperature environment can maintain a good seal.

In view of the above characteristics, the soft sealing butterfly valve is suitable for two-way opening and closing of ventilation and dust removal pipelines, water treatment, light industry, petroleum, chemical and other industries. Hard seal butterfly valve is used for heating, gas supply, and gas, oil, acid and alkali environment.

With the wide use of butterfly valve, its convenient installation, convenient maintenance, simple structure features more obvious. Electric soft seal butterfly valve, pneumatic soft seal butterfly valve, hard seal butterfly valve, etc. in more and more occasions began to replace the electric gate valve, globe valve and so on.

More information about butterfly valve 13703820603/15551530000 in total