Why a Quote for Cleaning Equipment Needs These 5 Parameters

Two machines can both be called a "cleaning machine" and still differ widely in shape, specification and configuration. So without parameters there is no quote - not because we are unwilling to quote, but because the number cannot be compared.

Five parameters decide the configuration: impurity content and impurity type, moisture, output, clear height and site, material shape and variety. These five directly affect the number of screen decks, hole shape, fan and air duct, material and structure, drive margin, dust collection interface and whether a gravity separation stage is needed. Every one of them moves the price.

Put the other way round: give these five and the price quoted is "the price of the same machine"; do not give them and we can give a range and talk again at contract signing - and that is when the talking really gets hard.

First parameter: impurity content and impurity type

How high the impurity content is decides how much dirty work the machine has to do; the type of impurity decides which method is used.

Impurity content does not need to be accurate to a decimal place; a range is enough to judge. The key point is whether stones and metal are among the impurities - those two decide whether iron removal and wear-resistant configuration are needed, and they are also the main reason screens and equipment get damaged.

Second parameter: moisture content

Moisture content is the most easily underestimated item in the configuration of cleaning equipment. It affects three things at once:

• Throughput capacity. When moisture is high the material flows poorly, and the same specification handles less, so the configuration has to leave margin.
• Risk of blocking and pegged holes. Material with high moisture content sticks to the screen surface and blinds the hole walls, and needs a different screen structure and anti-blinding configuration.
• Material and structure. Handling high-moisture material over the long term needs corrosion protection and the structural form taken into account accordingly.

There is also an interface issue: if there is a dryer upstream, the grain is in very different states before and after drying, and cleaning placed before drying or after drying is configured differently. Without this information the plan has to assume.

Third parameter: output

Output has two elements: the throughput per hour, and whether that figure is a normal figure or a peak figure.

Arrivals in the grain buying season are concentrated: several trucks queue at once, then the line sits idle for hours. Size the equipment on the daily average and trucks will back up at peak, or you have to run it fast for one pass and the cleaning result suffers. Sizing for the peak-hour rate is the least troublesome choice.

Output also decides: equipment size and power, chute cross-section, the capacity of matched conveying and elevating equipment, and whether several units have to run in parallel. Quote the output too small and the whole line shrinks with it; too large and investment and power consumption rise together. So this figure should follow need - bigger is not better.

Fourth parameter: clear height and site

This item does not show on the quotation sheet, but it decides the process layout and directly changes the configuration list.

• Enough clear height: a multi-level layout is possible, one lift completes several cleaning stages, with fewer conveying links and a smaller footprint.
• Not enough clear height: a single-level layout is the practical option, compensated by adding conveying and transfer points, so both the number of machines and the investment go up, and running cost is higher too.
• Site shape and access direction: where the grain comes in, where the grain goes out, how the trucks move - these decide equipment orientation and chute routing.

Many cases of "same capacity, prices miles apart" start right here: one plan includes extra conveying and transfer equipment, the other does not. Compare the list, not the total price; otherwise you are not comparing the same thing.

Fifth parameter: material shape and variety

Wheat, corn, paddy, soybean and miscellaneous grains differ in kernel shape, bulk density and flowability, so screen hole shape and air volume parameters differ as well. On the same screen surface, regular-shaped kernels and flat kernels perform very differently.

If one machine rotates between several varieties, also state the share of each variety and how often you switch. Equipment shared by several varieties has to compromise in configuration, and the plan should state whether the screen has to be changed at switchover and how easy adjustment is.

What a quotation you can actually compare should contain

Compare this list, not the total price. One screen deck less, thinner plate, no dust collection interface, no sampling port, insufficient drive margin - the total price looks cheaper, but when the actual output does not meet the target, the cost of a second retrofit far exceeds what was saved.

Why "just give me a price first" often ends up costing more

• Quote at the minimum configuration first, then add items one by one. The final total is often higher than a plan quoted to requirements from the start.
• Quote at an output that is too low and it cannot be reached. Either add equipment or accept short capacity.
• Quote at the wrong deck count and the indicators cannot be met. Acceptance fails, and the rectification cycle is longer than the procurement cycle.
• Connecting parts are not counted. When the equipment arrives you find the chutes, conveying and dust collection interfaces were not in scope.

So asking for "a price first" is not wrong in itself, but the price has to be on the same basis: give all five parameters, and the numbers can be compared side by side.

A parameter list you can copy straight out

• Material name and variety, and whether several varieties rotate
• Impurity content range, main impurity types (stones, metal, stones of similar size to grain)
• Moisture content range, and whether cleaning is before or after drying
• Required throughput per hour, and whether that is a normal or a peak figure
• Site dimensions, available clear height, grain in and out directions, power supply conditions
• Cleaning objective and acceptance basis (who accepts, and which indicators)

Send these six lines and the plan can be pinned down to a concrete configuration; equipment parameters and capacity are calculated against your working conditions, and configuration and acceptance indicators follow the technical agreement in the contract. If you have just part of the information for now, we can give directional advice from the known conditions first, but be clear about which parts are assumptions - writing the assumptions out is more responsible than quoting a vague number.

Can you give me a rough price range first?

We can give a range, but the assumptions behind that range have to be stated first. On the same cleaning machine, deck count, hole shape, fan configuration, accessories, and whether conveying and dust collection interfaces are included - a change in any one of them affects the price. A range is for preliminary budgeting, nothing more; a genuinely comparable quote is a list calculated against the five parameters, otherwise it will change again at contract signing.

Two quotes differ a lot - is one of them cheating me?

Not necessarily. Compare the list rather than the total: whether the number of screen decks and the hole shape match, the plate thickness and material, whether air separation and a dust collection interface are included, whether iron removal and a sampling port are included, whether conveying, elevating and commissioning are included, and whether the warranty scope is the same. The usual sources of the gap are that one side included extra conveying and transfer stages and the other did not, or that one side sized for peak output while the other sized for the daily average.

Does clear height really affect the quote that much?

It affects it a great deal, because clear height decides whether a multi-level layout is possible. With enough clear height, one lift completes several cleaning stages, with fewer conveying links and a smaller footprint; without it, a single-level layout is what is left, compensated by extra conveying and transfers, so the number of machines and the investment both rise, and running cost is higher. That is why the same capacity requirement can produce a completely different list depending on clear height.

I do not know my exact impurity content - what should I do?

A range is enough to judge; there is no need for decimal accuracy. What matters more is stating the impurity types, especially whether there are stones, metal or stones of similar size to grain - those directly decide whether iron removal, wear-resistant configuration and a gravity separation stage are needed. When impurity content is uncertain, design for the higher case and leave room for adjustment, and write the assumption into the plan.

For multi-variety rotation, what should I watch in the configuration?

State the share of each variety and how often you switch. Different materials differ in kernel shape, bulk density and flowability, and the hole shape and air volume parameters differ too; shared equipment has to compromise in configuration, and it should be clear whether the screens have to be changed at switchover and how convenient adjustment is. This goes into the plan and the operating instructions, and it is also where acceptance disputes easily start.

Send these six lines of parameters and the quote becomes comparable

Material and variety, impurity content range and main impurities, moisture content and whether cleaning is before or after drying, throughput per hour (normal or peak), site dimensions and clear height, cleaning objective and acceptance basis. Equipment parameters and capacity are calculated against your working conditions, and configuration and acceptance indicators follow the technical agreement in the contract.

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