Silo Dust Collector RFQ and Quotation Checklist
The process, mechanical, electrical, documentation and commercial information needed for an accurate quotation.
A complete inquiry lets a supplier select a collector and return a comparable quotation quickly. It also records assumptions that would otherwise become expensive changes after fabrication.
What information is needed to quote a silo dust collector?
An accurate quotation needs four things above all: the filling rate, the material, the air temperature, and the flange arrangement. Everything else refines the price. Without those four, any figure returned is a price-list guess rather than a calculation.
The reason is that vent airflow is set by how fast the silo is filled, and filter area follows from that airflow divided by an air-to-cloth ratio the dust can tolerate. Silo diameter alone does not produce either number.
What should be in the enquiry?
| Information | Why it is needed | If it is missing |
|---|---|---|
| Peak filling rate and method | Sets the vent airflow the filter must pass | Sizing falls back to assumptions; undersizing is likely |
| Material name and particle size | Sets the usable air-to-cloth ratio and media | Media may blind in service |
| Air temperature at the vent, continuous and peak | Constrains media and affects volumetric flow | Media temperature limit may be exceeded |
| Moisture / condensation behaviour | Decides whether surface-treated media is needed | Cake binds and pressure drop will not recover |
| Flange size and mounting detail | Determines the mating arrangement | Mismatch discovered at installation |
| Headroom above the silo roof | Limits housing height and element length | Unit may not physically fit |
| Electrical supply | Voltage, frequency and component selection | Equipment arrives unusable on site supply |
| Available compressed air | Confirms the cleaning system can be supplied | Cleaning underperforms from commissioning |
| Emission limit | Drives media and surface finish | Installation may not meet the permit |
| Hazardous area classification | Determines electrical and construction requirements | Equipment cannot be legally installed |
Which single item is most often missing?
The peak filling rate. Enquiries very often give the silo diameter and capacity, which describe storage rather than airflow. Two silos of identical size can require different vent filters if one is filled by screw conveyor and the other by a tanker discharging at high rate.
If the figure is not known precisely, the equipment that produces it usually is — the blower model, the tanker discharge arrangement, or the conveying line size. That is enough for a supplier to work from, and far better than leaving it blank.
What should come back with the quotation?
- Filter area in m², stated as a number rather than implied by a model code
- Air-to-cloth ratio used for the sizing, and the airflow it was based on
- Body material and thickness, plus surface treatment
- Filter element type, media and any surface finish, with quantity and dimensions
- Cleaning system: valve count, control method, compressed air pressure and consumption required
- Electrical specification: voltage, frequency, protection rating, component makes
- Flange drawing or outline dimensions for approval
- Documents included and lead time
A quotation that states only a model number and a price cannot be compared against another quotation in any meaningful way.
How can the enquiry be prepared quickly?
- Take the filling equipment details from the plant, not from memory — blower model or tanker arrangement
- Note the material name exactly as used on site
- Record air temperature in the hottest and coldest season
- Photograph the existing flange and mounting, with a tape measure in frame
- Measure available headroom above the roof
- Confirm the site electrical supply from the panel, not from assumption
- Check whether the area has a hazardous area classification
- Send any existing silo or vent drawings, even if incomplete
Frequently asked questions
What is the minimum information needed for a silo dust collector quotation?
Peak filling rate and method, material name, air temperature at the vent, and flange arrangement. Those four allow the airflow and filter area to be calculated. Anything quoted without them is taken from a price list rather than sized.
Can I get a quote if I only know the silo size?
A budget figure, yes; an accurate one, no. Silo size describes storage capacity, not the airflow the vent filter must pass. Adding the filling method and rate changes the sizing significantly.
Why does the supplier need the air temperature?
Temperature constrains which filter media can be used continuously, and it changes the volumetric flow the filter actually sees. A rate quoted at ambient understates the duty when warm material or warm conveying air enters the silo.
What should the quotation itself contain?
Filter area in square metres, the air-to-cloth ratio and airflow used for sizing, body material and thickness, element type and quantity, cleaning system details with compressed air demand, electrical specification, an outline or flange drawing, included documents and lead time.
Why do I need to state the available compressed air?
Pulse cleaning depends on the site air system delivering enough flow at the required pressure during the cleaning sequence. If the existing system cannot meet it, cleaning underperforms from commissioning regardless of how the collector was built.
Does a hazardous area classification change the enquiry?
Yes, substantially. It determines the electrical component specification and construction requirements, and it needs to be stated at enquiry stage rather than after the equipment has been built.