Valve selection basis.
After understanding and mastering the steps of selecting a valve, it is necessary to understand the basis for selecting a valve.
(a) Purchasing valve purpose, usage status and operation control method;
B. Characteristics of working medium: working pressure, working temperature, corrosiveness, whether it contains solid particles, whether the medium is toxic, whether it is flammable, explosive, medium viscosity, etc.
③Valve fluid characteristics requirements: flow resistance, discharge capacity, flow characteristics, sealing grade, etc.
Installation size and external dimension requirements: nominal diameter, pipe connection method and connection size, external dimension or weight limit of water solenoid valve, etc.
(ii) Additional requirements for the reliability and life of valve products and the explosion-proof performance of electric equipment.
(Note when selecting parameters: If the valve is used for control purposes, the manual solenoid valve must determine the following additional parameters: operation method, maximum and minimum flow requirements, pressure drop in normal flow, pressure drop when closed, maximum and valve Minimum inlet pressure.
Based on the above basis and steps for selecting the valve, when selecting the valve reasonably and correctly, you must also have a detailed understanding of the internal structure of various valves in order to make the correct choice of the priority valve.