Valve manufacturers: tell you the basis for choosing valves

The selection of valves is based on structural characteristics: it identifies certain structural characteristics of the valve installation, repair and maintenance method. The structural characteristics are: the structural length and overall height of the valve, and the connection form of the pipeline (flange connection, thread connection, clamp connection, external thread connection, welded end connection, etc.); The form of sealing surface (inlay ring, thread ring, surfacing welding, spray welding, valve body); Valve stem structure (rotating rod, lifting rod), etc.

Valve selection basis:

1. The purpose, working conditions and operation control method of the selected valve, valve specifications and categories should meet the requirements of the pipeline design document, and the working pressure should be greater than or equal to the working pressure of the pipeline.

2. 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 flammable and explosive medium and the viscosity of the medium.

3. Valve fluid characteristics requirements: flow resistance, discharge, flow characteristics, sealing level, etc.

4. Requirements for installation dimensions and external dimensions: nominal diameter, connection and connection dimensions with pipes, external dimensions or weight limits, etc.

5. Additional requirements for valve product reliability, service life and explosion-proof performance of electrical equipment.