If your machine cycle is 2 seconds, this ejector is too slow. You need a larger nozzle or multi-stage ejector.
is typically estimated using empirical correlations or manufacturer curves. A common approach uses the formula: vacuum ejector calculation
| Nozzle (mm) | Air Use (SCFM) | Suction Flow @ -60kPa (SCFM) | Best For | | :--- | :--- | :--- | :--- | | 0.5 | 3 | 2.5 | Small chips, SMD components | | 0.7 | 6 | 5.0 | Small plastic parts, syringe filling | | 1.0 | 12 | 9.5 | General automation, ≤ 5kg parts | | 1.5 | 27 | 18.0 | Large sheets, bags, >10kg parts | | 2.0 | 48 | 28.0 | Palletizing, high-speed glass handling | If your machine cycle is 2 seconds, this ejector is too slow
To calculate performance, we focus on three variables: , Nozzle diameter , and Vacuum level . A common approach uses the formula: | Nozzle
At=WmCd⋅γ⋅ρ⋅Pm⋅(2γ+1)γ+1γ−1cap A sub t equals the fraction with numerator cap W sub m and denominator cap C sub d center dot the square root of gamma center dot rho center dot cap P sub m center dot open paren the fraction with numerator 2 and denominator gamma plus 1 end-fraction close paren raised to the the fraction with numerator gamma plus 1 and denominator gamma minus 1 end-fraction power end-root end-fraction Cdcap C sub d is the discharge coefficient and is the ratio of specific heats. Step D: Diffuser Sizing