蝶阀软密封：

Butterfly valve soft seal:

密封副两侧为金属材料，另一侧为弹性非金属材料，称为“软密封”。该密封性能好，但不耐高温，易磨损，力学性能差。如：钢橡胶、钢四氟乙烯等。软密封座采用具有一定强度、硬度和耐温性的非金属材料，密封性能好，可实现零泄漏，但寿命和温度适应性较差。

The two sides of the sealing pair are made of metal material, and the other side is made of elastic non-metallic material, which is called "soft seal". The sealing performance is good, but it is not resistant to high temperatures, prone to wear, and has poor mechanical properties. For example, steel rubber, steel tetrafluoroethylene, etc. The soft seal seat is made of non-metallic materials with certain strength, hardness, and temperature resistance. It has good sealing performance and can achieve zero leakage, but its lifespan and temperature adaptability are poor.

硬密封：

Hard seal:

密封副的两侧为金属材料或其他硬材料，称为“硬密封”。该密封性能差，但耐高温、耐磨、机械性能好。如：钢、铜、钢石墨、钢合金钢；（这里的钢也可以是铸铁、铸钢、合金钢或堆焊、喷涂合金）。

The two sides of the sealing pair are made of metal or other hard materials, which is called a "hard seal". The sealing performance is poor, but it has good high temperature resistance, wear resistance, and mechanical properties. For example: steel, copper, steel graphite, steel alloy steel; (The steel here can also be cast iron, cast steel, alloy steel, or welded or sprayed alloy.).

蝶阀（蝶阀厂家）硬密封采用金属制成，密封性能相对较差，尽管一些制造商声称可以实现零泄漏。软密封不能满足部分腐蚀性材料的工艺要求，硬密封可以解决！这两种密封可以相互补充。就密封而言，软密封相对较好，但现在硬密封的密封也可以满足相应的要求！软密封的优点是密封性能好，缺点是易老化、磨损、使用寿命短。硬密封使用寿命长，但密封性能比软密封差。

Butterfly valves (butterfly valve manufacturers) have hard seals made of metal, which have relatively poor sealing performance, although some manufacturers claim to achieve zero leakage. Soft seals cannot meet the process requirements of some corrosive materials, while hard seals can solve the problem! These two types of seals can complement each other. In terms of sealing, soft sealing is relatively good, but now hard sealing can also meet the corresponding requirements! The advantage of soft sealing is good sealing performance, but the disadvantage is easy aging, wear, and short service life. Hard seals have a long service life, but their sealing performance is inferior to soft seals.