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Cyclone separator proportions: Stairmand high-efficiency and Lapple conventional

Name: Cyclone separator proportions: Stairmand high-efficiency and Lapple conventional dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What are the standard cyclone separator dimensions (Stairmand, Lapple) as ratios of the barrel diameter? · Standard part · basis: Published ratios: Stairmand 1951, Lapple 1951, as tabulated in Utikar et al. 2010, Grave et al. 2021 and Dartmouth ENGS 37 notes

Also called: cyclone separator dimensions, stairmand cyclone, lapple cyclone, cyclone design ratios, dust separator stl, cyclone dust collector design, shop vac cyclone, cyclone inlet size, vortex finder diameter, cyclone cone angle

Exact dimensions. True size, with no printing tolerance added.

sizes: 8 in table

Notes

Reference geometry from published ratios; no efficiency claim. A reverse-flow cyclone is sized by its barrel diameter D: every other dimension is a fixed ratio of D for a given family. Gas enters tangentially through a rectangular inlet, spirals down the barrel and cone, and leaves upward through the vortex finder; the separated dust leaves through the bottom outlet.
Stairmand (1951) high-efficiency and Lapple (1951) conventional ratios as tabulated by Utikar et al. (2010, after Leith & Licht 1972), Grave et al. (2021, Stairmand only) and Cushman-Roisin (Dartmouth, after Cooper & Alley). Utikar et al. print the Lapple cylinder height as 1 D; the other tabulation prints 2 D with a 2 D cone and H = 4 D, which is what is used here.
Files: D = 100 and 150 mm for both families. D, a, b, De, S, h, H and B are gas-side (inside) sizes; the wall is added outside them. The wall (2 mm, normal to the cone too) and the inlet duct run (1 D from the barrel centre plane, open end) are example parameters, not part of the published ratios. The vortex finder is a plain tube De inside, flush with the top of the roof; the inlet's outer wall is tangent to the barrel and its top is level with the roof.
Material-neutral: the files are shapes. Wall thickness, joints and outlet connections are yours to choose.

Cyclone separator proportions: Stairmand high-efficiency and Lapple… size chart

dimension	Stairmand HE	Lapple	Stairmand at D = 100 / 150	Lapple at D = 100 / 150
a: inlet height	0.5 D	0.5 D	50 / 75 mm	50 / 75 mm
b: inlet width	0.2 D	0.25 D	20 / 30 mm	25 / 37.5 mm
De: vortex finder (gas outlet) diameter	0.5 D	0.5 D	50 / 75 mm	50 / 75 mm
S: vortex finder length below the roof	0.5 D	0.625 D	50 / 75 mm	62.5 / 93.75 mm
h: cylinder (barrel) height	1.5 D	2 D	150 / 225 mm	200 / 300 mm
H: overall height, roof to dust outlet	4 D	4 D	400 / 600 mm	400 / 600 mm
B: dust outlet diameter	0.375 D	0.25 D	37.5 / 56.25 mm	25 / 37.5 mm
cone height (H − h)	2.5 D	2 D	250 / 375 mm	200 / 300 mm

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

InTech (open access)	Utikar et al., Hydrodynamic Simulation of Cyclone Separators, in Computational Fluid Dynamics (2010), Table 1	web	Open access chapter; ratios are facts
EPJ Web of Conferences (open access)	Grave, Paulo, Petit, Irassar, Optimal design of cyclones in series ..., EPJ Web Conf. 249, 12003 (2021), Table 1	web	CC BY 4.0; ratios are facts
Dartmouth College (ENGS 37 course notes)	B. Cushman-Roisin, Cyclones: standard cyclone dimensions (Stairmand 1951, Lapple 1951, Swift 1969)	web	Publisher's page; dimensions are facts

Free files

★ Free files 4 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

cyclone-stairmand-d100	Stairmand high-efficiency proportions at D = 100 mm (inside): tangential rectangular inlet, vortex finder, cone to the dust outlet; example wall 2 mm, inlet duct run 1 D; reference geometry, no efficiency claim	STEP · STL
cyclone-stairmand-d150	Stairmand high-efficiency proportions at D = 150 mm (inside): tangential rectangular inlet, vortex finder, cone to the dust outlet; example wall 2 mm, inlet duct run 1 D; reference geometry, no efficiency claim	STEP · STL
cyclone-lapple-d100	Lapple conventional proportions at D = 100 mm (inside): tangential rectangular inlet, vortex finder, cone to the dust outlet; example wall 2 mm, inlet duct run 1 D; reference geometry, no efficiency claim	STEP · STL
cyclone-lapple-d150	Lapple conventional proportions at D = 150 mm (inside): tangential rectangular inlet, vortex finder, cone to the dust outlet; example wall 2 mm, inlet duct run 1 D; reference geometry, no efficiency claim	STEP · STL

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Plain text: sheet.txt · JSON: /api/geometry?object=cyclone-separator-proportions

Cyclone separator proportions: Stairmand high-efficiency and Lapple conventional, isometric render of a generated part — Render of cyclone-lapple-d100 from the free STEP; not to scale.

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Questions

What are the Stairmand high-efficiency cyclone proportions?

Inlet 0.5 D high × 0.2 D wide, vortex finder 0.5 D diameter and 0.5 D long, barrel 1.5 D, overall 4 D, dust outlet 0.375 D.

How does the Lapple cyclone differ?

Wider inlet (0.25 D), longer vortex finder (0.625 D), taller barrel (2 D), smaller dust outlet (0.25 D); same 0.5 D inlet height, outlet and 4 D overall.