Selection of valves
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Data Medium name: Heat transfer oil. State of the medium: Liquid. Flow rate in kg/h: Liquid. Flow rate value: False, False. Center position: Center. Maximum flow rate in m3/h: 36976.8. Steam flow rate in kg/h: Normal value is 30814. Gas flow rate in m3/h: Minimum value is 18488.4. Operating temperature: °C 305. Operating density: kg/m3 805. Reference density: kg/m3. Dynamic viscosity: mm2/s 0.6. Kinematic viscosity: mPa·s. Superheat (△t): °C. Pressure before the valve (P1): MPa 0.8. Pressure after the valve (P2): MPa 0.7. Pressure difference (△P): MPa 0.1. Pressure drop at full closure: MPa 1.1. Compression coefficient (Z): …… Isentropic exponent (K): …… Saturated pressure of the liquid (Pv): MPa. Critical pressure of the liquid (Pc): MPa. Pipe specifications: Nominal diameter (DN): 150. Outer/diameter and inner diameter: mm 168/155. Pipe grade: Material: Steel grade 20. Please help to check this
What kind do you want? Ball valve, gate valve? Where is it used?
Is yours a pressure regulating valve or a pressure stabilizing valve? If it’s a regular on/off type valve, a three-eccentric hard-sealed disc valve or a hard-sealed ball valve will suffice. For regulating valves, the parameters you provided aren’t yet complete enough.
LZ, there’s an issue with your data volume – it shows over 30,000, but it should be in the 30s. Gate valves, ball valves, and plug valves can all be used
It should be a calculation sheet for control valves; just determine the diameter. It’s better to use sleeves to account for the pressure difference, for medium-temperature applications. As for electric or pneumatic operation, it depends on the requirements.
It is clearly a selection specification table for control valves, but it lacks parameters.