1. The purpose of the selected pressure reducing valve, the operating conditions and the control method.
2. The nature of the working medium: working pressure, working temperature, corrosive properties, whether it contains solid particles, whether the medium is harmful, whether it is a flammable or explosive medium, the viscosity of the medium, etc.
3. Requirements for the fluid characteristics of the pressure reducing valve: flow resistance, discharge capacity, flow characteristics, sealing level, etc.
4. Requirements for installation size and external size of the pressure reducing valve: nominal diameter, connection method and connection size with the pipeline, external size or weight limit, etc.
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