Nowadays, there are more and more valves on the market. The types of valves are particularly complex, and the structure and material are also different. The selection of valves is very important for the long-term operation of the device in working conditions. The improper selection of valves and users’ignorance of valves are the source of accidents and safety threats. However, in today’s society, the demand for valve products is more and more widespread in the industry. Users should have a further understanding and recognition of the knowledge of valves and other aspects.
There are generally two kinds of valve characteristics, service characteristics and structural characteristics.
Use characteristics: It determines the main performance and scope of use of the valve, belonging to the characteristics of the valve: the types of valves (closed-circuit valves, regulating valves, safety valves, etc.); product types (gate valves, globe valves, butterfly valves, ball valves, etc.); the main parts of the valve (valve body, cover, stem, disc, sealing surface) materials; valve transmission mode, etc.
Structural characteristics: It determines the structural characteristics of valve installation, maintenance and other methods. It belongs to the structural characteristics of the valve: the length and overall height of the valve, the connection form with pipeline (flange connection, threaded connection, clamp connection, external thread connection, welding end connection, etc.); the form of sealing surface (ring, threaded ring, surfacing, spray welding, valve body); Rod structure (rotating rod, lifting rod) and so on.
Post time: Jun-25-2019
