HOW TO SELECT THE RIGHT SIZE OF BUCKET?
Want to Use a Bucket Elevator but not sure which size? We will Help you out here!
Capacity of Bucket Elevator mainly depends on the following factors
- Bucket Volume
- Bucket Spacing
- Belt Speed
- Bulk Density of the Product
- Filling Factor of the Bucket
Formula for Calculating Capacity of Bucket Elevator
Capacity in kg/hr = (L x Nx S x ρ x F )/ 3600
- L = Bucket Volume in Liters
- N = Number of Buckets per meter
- S = Belt speed in m/s
- ρ = Density of product in Ton/m3
- F = Filling Factor is without unit
- 3600 is seconds per hour
Example:
You need a Bucket Elevator for 12 Tons per Hour for Sand.
You have the Following Data
- Capacity in Kg/hr = 12000
- N = Number of Buckets per meter = 3 (assumed)
- S = Belt speed in m/s = 0.8 m/s – standard speed
- ρ = Density of product in Ton/m3 = 1.6 Ton/m3
- F = Filling Factor is without unit = 0.6 (assumed)
- 3600 is seconds per hour
- L = Bucket Volume = Unknown
Lets put the data in the formula
12000 = L x 3 x 0.8 x 1.6 x 0.6/ 3600
Therefore, 12000 = L x 0.00064
Therefore , L = 12000 x 0.00064
Therefore, L = 7.68 Ltrs
It Implies that if you use a bucket of 7.68 Ltrs then your Bucket Elevator will give a capacity of 12000 kg/hr
How to select the Bucket
Refer the Table Below
| Sr.No. | Length (A) mm | Width (B) mm | Projection (D) mm | Water Capacity (Net) (Ltrs) | Water Capacity (Gross) (Ltrs) |
|---|---|---|---|---|---|
| 1 | 62.5 | 68.75 | 57.5 | 0.12 | 0.2 |
| 2 | 75 | 87.5 | 75 | 0.17 | 0.27 |
| 3 | 87.5 | 87.5 | 75 | 0.22 | 0.35 |
| 4 | 100 | 93.75 | 75 | 0.23 | 0.4 |
| 5 | 100 | 103 | 87.5 | 0.25 | 0.45 |
| 6 | 112.5 | 100 | 90 | 0.32 | 0.52 |
| 7 | 125 | 100 | 87.5 | 0.36 | 0.58 |
| 8 | 125 | 118.75 | 100 | 0.5 | 0.75 |
| 9 | 137.5 | 112.5 | 96.8 | 0.55 | 0.85 |
| 10 | 150 | 100 | 87.5 | 0.45 | 0.7 |
| 11 | 150 | 118.75 | 100 | 0.6 | 0.92 |
| 12 | 175 | 100 | 87.5 | 0.48 | 0.8 |
| 13 | 175 | 118.75 | 112.5 | 0.7 | 1.0 |
| 14 | 200 | 100 | 87.5 | 0.65 | 1.0 |
| 15 | 200 | 112.5 | 100 | 0.8 | 1.1 |
| 16 | 200 | 131.25 | 118.75 | 1.1 | |
| 17 | 225 | 175 | 115.6 | 1 | 1.7 |
| 18 | 225 | 125 | 134.3 | 1.6 | 1.6 |
| 19 | 225 | 175 | 150 | 2.3 | 2.4 |
| 20 | 250 | 150 | 134.3 | 1.9 | 3.5 |
| 21 | 300 | 150 | 134.3 | 2.2 | 2.9 |
| 22 | 300 | 200 | 168.75 | 3.0 | 3.4 |
| 23 | 300 | 200 | 187.5 | 3.4 | 4.9 |
| 24 | 350 | 175 | 156.25 | 3.2 | 4.8 |
| 25 | 400 | 212.5 | 168.75 | 4.8 | 8.5 |
| 26 | 400 | 212.5 | 187.5 | 7 | 9.7 |
| 27 | 450 | 218.75 | 200 | 9 | 13.0 |
| 28 |
We need a Bucket of 7.6 Ltrs.
In the Gross Volume Column we have to look for a bucket of 7.6 Ltrs.
We can see that the Bucket No. 25 of 400 mm Length is of 8.7 Ltrs. This means that we will have to select a bucket of 400 mm length and that will give us a capacity in excess of 12000 kg of Sand.
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