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Venturi Scrubber
Removal of dust, included adhesive or deliquescent property
Required straight lengths for venturi nozzles
Values expressed as multiples of D| Diameter ratio β |
Upstream (inlet) side of the primary device | Downstream (outlet) side of the primary device |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Single 90° bend of tee (flow from one branch only) |
Two or more 90° bends in the same plane | Two or more 90° bends in different plane | Reducer 2D to D over 2 length of 1.5D to 3D | Expander 0.5D to D over a length of D to 3D | Globe valve full open | Full bore bal or gate valve fully open | Abrupt symmertrical reduction having a diameter ratio ≥0.5 | Thermometer pocket or wel of diameter ≤ 0.03D |
Thermometer pocket or wel of diameter between 0.03D and 0.13D | Fitting (columns 2 to 8) | |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 0.20 | 10(6) | 14(7) | 34(17) | 5 | 16(8) | 18(9) | 12(6) | 4(2) | |||
| 0.25 | 10(6) | 14(7) | 34(17) | 5 | 16(8) | 18(9) | 12(6) | 4(2) | |||
| 0.30 | 10(6) | 16(8) | 34(17) | 5 | 16(8) | 18(9) | 12(6) | 5(2,5) | |||
| 0.35 | 12(6) | 16(8) | 36(18) | 5 | 16(8) | 18(9) | 12(6) | 5(2,5) | |||
| 0.40 | 14(7) | 18(9) | 36(18) | 5 | 16(8) | 20(0) | 12(6) | 6(3) | |||
| 0.45 | 14(7) | 18(9) | 38(17) | 5 | 17(9) | 20(10) | 12(6) | 6(3) | |||
| 0.50 | 14(7) | 20(10) | 40(20) | 6(5) | 18(9) | 22(11) | 12(6) | 30(15) | 5(3) | 20(10) | 6(3) |
| 0.55 | 16(8) | 22(11) | 44(2) | 8(5) | 20(10) | 24(12) | 14(7) | 6(3) | |||
| 0.60 | 18(9) | 26(13) | 48(24) | 9(5) | 22(11) | 26(13) | 14(7) | 7(3,5) | |||
| 0.65 | 22(11) | 32(16) | 54(27) | 11(6) | 25(13) | 28(14) | 16(8) | 7(3,5) | |||
| 0.70 | 28(14) | 36(18) | 62(31) | 14(7) | 30(15) | 32(16) | 20(10) | 7(3,5) | |||
| 0.75 | 36(18) | 42(21) | 70(35) | 22(11) | 38(19) | 36(18) | 24(12) | 8(4) | |||
| 0.80 | 48(23) | 50(25) | 80(40) | 30(15) | 54(27) | 44(22) | 30(15) | 8(4) | |||