The final cut size, D₅₀ = D _50b × C₁ × C₂ × C₃

While designing the hydro cyclone, initially the dimensions of inlet, overflow and discharge openings can be assumed and pressure drop fir this configuration is evaluated and the procedure can be continued unless the minimum pressure drop value is achieved.

The permissible pressure drop value for in case of hydro cyclone is between 0.2-0.7 kg/cm²

Capacity in case of 38° hydro cyclone can be estimated as:

Where, q – slurry feed rate, lit/min; D- diameter of cyclone, cm; d_u -internal diameter of underflow, cm; ΔP- pressure drop between inlet and over flow outlet, kg/cm² ; ρ_s – density of slurry, kg/cm³.

K – 0.51 for D = 80 to 100 mm

K – 0.524 for D = 125 to 600 mm

The ratio of d_u /d₀ = 0.4; d_i – diameter of inlet, d₀ – diameter of outlet

(2d_i + d₀) = (D/2); d₀ /d_i = (1.0 - 2.0)

Optimum diameter of hydro cyclone D is 5-8 times the internal diameter of inlet.

Length of conical section can be estimate as

The hydro cyclone performance totally depends upon solid contents of feed, feed flow rate and the pressure at which it enters the hydro cyclone. Any deviation in these parameters can lead to erratic performance.