Hard sealed butterfly valve:
Butterfly valve hard seal refers to: the two sides of the sealing pair are metal materials or hard other materials. This seal has poor sealing properties, but it has high temperature resistance, wear resistance, and good mechanical properties. Such as: steel + steel; steel + copper; steel + graphite; steel + alloy steel. The steel here may also be cast iron, cast steel, alloy steel may also be overwelded, spraying alloy.
Soft sealed butterfly valve:
Butterfly valve soft seal refers to: the two side of the sealing pair is metal material, the other side is elastic non-metallic material. This kind of seal sealing performance is good, but not high temperature resistance, easy to wear, poor mechanical. Such as: steel + rubber; steel + tetrafluorotype polyethylene, etc.
The soft sealing seat is made of non-metallic materials with certain strength, hardness and temperature resistance, good performance can make zero leakage, but the life and adaptability to temperature are poor. Hard seal is made of metal, and the sealing performance is relatively poor. Although some manufacturers claim that zero leakage. Soft sealing can not meet the process requirements for a part of the corrosive materials. Hard seals can be solved, and the two seals can complement each other. In terms of sealing, soft sealing is relatively good, but now the sealing of hard sealing can also meet the corresponding requirements. The advantages of soft sealing are good sealing performance, but the disadvantages are easy to aging, wear and short service life. Hard seal service life is long, but the seal is relatively worse than the soft seal.
The structural differences are mainly as follows:
1. Structural differences
Soft sealing butterfly valves are mostly medium linear and concentric butterfly valve, and hard seals are mostly single eccentric, double eccentric and three eccentric butterfly valves.
2. Temperature resistance
Soft seal is used in room temperature environment. Hard seal can be used for low temperature, room temperature, high temperature and other environments.
3. Pressure
Soft seal low pressure-normal pressure, hard seal can also be used in high pressure and other working conditions.
4. Sealing performance
The three-eccentric butterfly valve can maintain a good seal in the high pressure and high temperature environment.
In view of the above characteristics, the soft sealed butterfly valve is suitable for the two-way opening and closing and adjustment of the ventilation and dust removal pipeline, water treatment, light industry, petroleum, chemical industry and other industries. Hard sealed butterfly valve is mostly used for heating, gas supply, gas, oil, acid, alkali and other environment.
With the wide use of butterfly valve, its convenient installation, convenient maintenance and simple structure are more and more obvious. Electric soft sealing butterfly valve, pneumatic soft sealing butterfly valve, hard sealing butterfly valve in more and more occasions began to replace the electric gate valve, stop valve and so on.
Besides, Tianjin Tanggu Water Seal Valve Co., Ltd. is a technologically advanced elastic seat valve supporting enterprises, the products are elastic seat wafer butterfly valve, lug butterfly valve, double flange concentric butterfly valve, double flange eccentric butterfly valve, balance valve, wafer dual plate check valve, Y-Strainer and so on. At Tianjin Tanggu Water Seal Valve Co., Ltd., we pride ourselves on providing first-class products that meet the highest industry standards. With our wide range of valves and fittings, you can trust us to provide the perfect solution for your water system. Contact us today to learn more about our products and how we can help you.
Post time: Mar-23-2024
