Soft sealing butterfly valve gate and hard seal butterfly valve gate structure difference

Soft sealing butterfly valve gate and hard seal butterfly valve gate structure difference and use scope of soft sealing butterfly valve door: both sides of the seal side is the metal material, on the other side is elastic nonmetallic material called & quot; Soft seal & quot; 。 This seal sealing performance is good, but not high temperature resistant, easy to wear and poor machinery. Such as: steel + rubber; Steel + four fluorine polyethylene; Soft seal USES a certain strength, hardness and heat resistance properties of non-metallic materials, sealed performance is good, can achieve zero leakage, but with poor life and adaptability to temperature. Soft seal part of corrosive material can't meet the technological requirements, hard seal disc valve can solve! The two seal can complement each other, in terms of sealing soft seal is relatively good, but now hard seal sealing can also meet the requirements of corresponding! The advantage of soft sealing disc of the valve is sealed performance is good, defect is easy ageing, wear and short service life. Hard seal disc valves service life is long, but relatively poor than soft sealing butterfly valve door sealing. Hard seal butterfly valve door refers to both sides of the sealing pair are metal materials or other hard materials is called & quot; Hard seal & quot; 。 Butterfly valve door hard seal sealing performance is poor, but high temperature resistance, wear resistance, good mechanical performance. Such as: steel + steel; Steel + copper; Steel + graphite; Steel + alloy steel; ( The steel may also be cast iron, cast steel, alloy steel can also be surfacing welding, spraying alloy) 。 Soft sealing butterfly valve gate and hard seal butterfly valve gate structure difference: 1, the difference of structure: soft sealing butterfly valve gate for the linear butterfly gate, hard seal for single eccentric butterfly valve door, double eccentric butterfly valve door, triple eccentric butterfly valve gate 2, heat resistance, soft seal used in normal temperature environment. Hard seal can be used in low temperature, normal temperature and high temperature environment, pressure: soft seal low-pressure - Atmospheric pressure, hard seal can also be used in high voltage condition such as 4, sealing performance, soft seal butterfly valve gate and three partial hardness sealing butterfly valve door sealing performance is better, triple eccentric butterfly valve door in high pressure high temperature environment can maintain a good seal. In view of the above characteristics, soft seal butterfly valve is suitable for ventilation and dust removal pipe two-way opening and closing door and adjustment, water treatment, light industry, petroleum, chemical industry, etc. Hard seal butterfly valve door for heat supply, gas supply, and gas, oil, acid and alkali environment. With the wide use of butterfly valve door, its easy installation, easy maintenance, simple structure and the characteristics of the obvious. Electric soft sealing butterfly valve, pneumatic door soft sealing butterfly valve, hard seal butterfly valve door in a growing number of occasions such as began to replace the electric gate valve gate, globe valves, etc.