How to choose a wear-resistant bidirectional hard seal butterfly valve?

How to choose a wear-resistant bidirectional hard seal butterfly valve?
With the continuous advancement of modern industrialization, butterfly valves, as a widely used valve product, have become indispensable and important equipment in the industrial field. Among them, bidirectional hard sealed butterfly valves have attracted widespread attention due to their advantages such as high hardness, wear resistance, high temperature resistance, and strong corrosion resistance.
Firstly, it is important to clarify how to choose butterfly valve products that are suitable for one's own industrial field. At present, there are a wide variety of bidirectional hard seal butterfly valves on the market, with varying quality and price. Choosing a suitable bidirectional hard seal butterfly valve requires not only strict adherence to relevant national standards and regulations, but also consideration from the following aspects.
Butterfly valve structure type
The structural types of bidirectional hard seal butterfly valves are usually divided into four types: centerline type, double eccentric type, and triple eccentric type. Different types of butterfly valves have their own advantages and disadvantages in use. Choosing a suitable butterfly valve type for different usage requirements can effectively improve the work efficiency and production efficiency of the entire system.
For example, centerline butterfly valves are suitable for applications such as low pressure, medium to low temperature, viscous liquids, and sewage due to their simple structure and reliable sealing. Double eccentric butterfly valves are widely used in fields such as chemical, food, light industry, medicine, and sewage treatment due to their excellent corrosion resistance and adjustable characteristics.

Sealing performance of butterfly valves
As a commonly used fluid control device, bidirectional hard seal butterfly valves should consider their sealing performance in key parts of the valve. According to different valve sealing materials, they can be divided into soft sealing butterfly valves made of polytetrafluoroethylene and hard sealing butterfly valves made of cast steel, stainless steel, and other materials.
The sealing performance of bidirectional hard sealing butterfly valves can be divided into two types: single and double sealing. A single seal butterfly valve mainly refers to a single layer of sealing ring between the valve disc and valve seat, while a double seal butterfly valve uses a double layer of sealing ring, which not only ensures sealing performance but also greatly enhances the durability of the entire valve.
Therefore, when choosing a bidirectional hard seal butterfly valve, different sealing materials and structures should be selected based on specific usage scenarios such as natural gas, petroleum, chemical engineering, and water treatment.
Butterfly valve operation mode
Common butterfly valve operation methods include manual, hydraulic, electric, and pneumatic. Among them, manual operation is more suitable for some places without power supply, while hydraulic, electric, and pneumatic operation methods can be used in some automated production places. In addition, when selecting hydraulic and pneumatic operation methods, it is necessary to pay attention to whether the parameters such as pressure and flow rate meet the requirements for valve use.
Butterfly valve material
The manufacturing materials of bidirectional hard seal butterfly valves mainly include cast steel, stainless steel, aluminum alloy, and other materials. Due to the direct impact of the manufacturing material of butterfly valves on their operational effectiveness, durability, and application range, when selecting butterfly valve materials, it is necessary to consider various factors such as specific usage, drainage methods, medium characteristics, and pressure to determine the manufacturing material.
In summary, when selecting a bidirectional hard seal butterfly valve, it is necessary to make a reasonable choice based on specific application scenarios, medium characteristics, pressure, flow rate, usage environment, and other factors. Making reasonable choices based on the above aspects can effectively improve the operational efficiency and normal production operation of the entire system.