Basis for choosing electric ball valve

1. The function, operating conditions and operation control method of the selected electric ball valve. (Note when selecting parameters: If the electric ball valve is to be used for control purposes, the following additional parameters must be determined: operating method, maximum and minimum flow requirements, pressure drop for normal flow, pressure drop when closing, maximum and minimum inlet pressure of the electric ball valve.)

According to the basis and steps of selection, when choosing reasonably and correctly, you must also have a detailed understanding of the internal structures of various types so that you can make the right choice for the preferred electric ball valve.

Pipeline control is. The opening and closing parts control the flow direction of the medium in the pipeline. The shape of the flow channel of the electric ball valve has certain flow characteristics. This must be taken into consideration when selecting an electric ball valve suitable for installation in the pipeline system.

2. Requirements for fluid characteristics of electric ball valves: flow resistance, discharge capacity, flow characteristics, sealing level, etc.

3. The nature of the working medium: working pressure, working temperature, corrosion performance, whether it contains solid particles, whether the medium is toxic, whether it is a flammable or explosive medium, the viscosity of the medium, etc.

4. Overall dimensions and external size requirements: nominal diameter, connection method and connection size with the pipeline, external dimensions or quality restrictions, etc.

5. Additional requirements for product reliability, service life and explosion-proof performance of electric devices.

The characteristics of electric ball valves include usage characteristics and structural characteristics, which determine the main performance and scope of use of electric ball valves. The usage characteristics of electric ball valves include: the category of electric ball valves (closed circuit, door, door, etc.); product type (gate valve, globe valve, butterfly valve, ball valve, etc.); the material of the main parts (casing, upper cover, valve stem, valve disc, sealing surface); transmission method, etc.

Structural characteristics are some structural characteristics that determine the installation, repair, and maintenance methods. The structural characteristics include: installation size and overall height, connection type with the pipeline (flange structure, internal thread connection, clamp connection, external and internal thread connection, welded end connection, etc.); type of sealing surface (inlaid ring, internal thread ring, overlay welding, spray welding, shell body); valve stem structural type (rotating rod, lifting rod), etc.