What type of on/off valve should be used for asphalt?
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This post was last edited by wa*da2011 on 2018-3-12 at 11:29. The medium is asphalt, and it’s a DN300 pipeline; I want to choose a pneumatic on-off valve with interlock functionality – which type of on-off valve would be suitable? Process parameters are shown in the table below: Instrument ID: XV-101; Detection location: PID diagram number; Medium name: Asphalt; Flow rate – Maximum: 320, Normal: 300, Minimum unit: m3/h; Temperature: °C 130; Density ρ (of the liquid under operating conditions): kg/m3 1250; Superheat Δt (only for water vapor): °C; Pressure before the valve P1: Mpa (G) 0.6; Pressure after the valve P2: Mpa (G); Viscosity (only for liquids): mm2/S, mPa.S 26.25; Compressibility factor (only for high-pressure gases): Z; Pressure when the valve is closed: Mpa (G) 0.6–0.8; Outer/diameter of pipe: mm 325/307.4; Pipe material: 20#; Pipe grade: 2.5A1; Control valve status in emergency situations: FC/FO/FL/FI; FC; Remarks: Equipped with manual operation function
Provide various parameters such as impurities and leakage levels first
The medium may contain a small amount of particles; leakage level V
You can’t answer just by repeating what was asked; there are factors like pressure difference as well
The valve should take jacket heating into consideration