What Should Buyers Verify When Comparing Factory Price Crushing & Screening Equipment?

A factory price for crushing and screening equipment is comparable only when every supplier is pricing the same screening duty and supply boundary. Define the feed gradation, moisture condition, required product cuts, normal and peak throughput, separation target and plant interfaces first. Then compare the proposed deck arrangement, screening media, drive, supports, chutes, controls, spares and documents. A lower figure may reflect fewer included items or a different capacity basis rather than a more economical solution. For a vibrating-screen RFQ, send representative feed data and require each bidder to return its design assumptions, offered configuration, exclusions and deviations. Align those technical points before comparing price, delivery time or commercial terms.

Why Does “Factory Price” Fail as a Standalone Comparison?

The phrase factory price crushing & screening equipment suggests direct sourcing, but it does not define what the equipment must accomplish. A quotation may cover a single vibrating screen, a screen with support structure, or a larger package that includes chutes, conveyors, dust-control interfaces and electrical components. These are different supply boundaries, even when the equipment names look similar.

Screen capacity is also not an isolated catalogue value. The same nominal feed rate can create different duties when one feed contains more near-size particles, more fines, higher moisture or a different bulk density. Near-size particles require more opportunities to find an opening. Moisture can make fine particles adhere to each other or blind the media. Uneven feed distribution can leave part of the deck underused while overloading another area. These interactions explain why a price without process data cannot establish value.

A buyer comparing suppliers should separate three questions:

• What screening result must the project achieve?
• What equipment and interfaces are included to achieve it?
• What evidence allows the buyer to verify the proposed duty and scope?

The Screening Duty Comes Before the Machine Name

A vibrating screen may perform scalping, intermediate sizing, final product classification or closed-circuit control. Each task changes the buyer’s priorities. A scalping duty may emphasize removal of oversized material before downstream equipment. Final product screening may place greater weight on cut accuracy, product contamination and control of near-size material. A closed circuit must also manage the return load to the crusher rather than only the final saleable products.

Before browsing the available crushing, screening and aggregate equipment categories, buyers should map every required product stream. State the nominal cut sizes, acceptable oversize and undersize carryover, hourly and daily production targets, and whether the stated capacity refers to fresh feed, total screen feed or finished product. If recirculating load is omitted, two suppliers may size against different tonnage even though both quotations claim to meet the same plant output.

Feed data should represent actual operating conditions, not an idealized sample. Useful inputs include material type, maximum lump size, feed gradation, bulk density, moisture range, clay or sticky-fines behavior, abrasiveness and expected fluctuations. A single maximum feed size cannot show how much material sits close to each aperture, yet that near-size fraction can strongly influence required screening area and retention time.

That relationship is central to selection. Material much smaller than an opening tends to pass with fewer presentation opportunities, while particles close to the aperture may travel farther before orienting correctly. If the feed contains a high near-size fraction, an offer based only on total tonnes per hour can overstate the useful separation duty. The supplier’s calculation or design-basis sheet should therefore show the gradation used at each cut, not merely the top size and total rate. Procurement can then check whether all bidders sized against the same difficult fraction.

Which Variables Should Be Fixed Before Prices Are Compared?

Buyer variable	What should be defined	Why it changes the offer	Useful quotation evidence
Screening duty	Scalping, sizing, final classification or closed-circuit control	Changes the required separation result and process interface	Process description and proposed flow diagram
Feed condition	Gradation, maximum size, moisture, density and sticky-fines behavior	Affects loading, stratification, blinding risk and usable deck area	Design-basis sheet linked to buyer data
Required products	Cut sizes, number of fractions and acceptable carryover	Determines deck arrangement, aperture selection and media layout	Product-stream table and deck layout
Capacity basis	Fresh feed, total screen feed or finished output; normal and peak rate	Prevents incompatible throughput claims	Capacity statement with assumptions
Installation interface	Footprint, elevation, feed and discharge points, access and power supply	Controls support structure, chute design and site integration	General arrangement drawing and interface list
Supply boundary	Media, drive, base, chutes, guards, controls, spares and services	Explains apparent price differences and later project costs	Inclusion, exclusion and deviation schedules

The table is not a substitute for a technical review. Two quotations can repeat the same buyer inputs but interpret them differently. One may treat the requested tonnes per hour as total screen feed, including recirculating load; another may treat it as saleable output. One may assume free-flowing dry material while another allows for a stated moisture range. The comparison sheet should copy each supplier’s interpretation beside the original RFQ value. Any difference that changes screen loading, aperture choice or ancillary equipment belongs in the deviation column before commercial ranking begins.

How Should Buyers Evaluate the Proposed Screen Configuration?

The offered configuration should follow the duty rather than a generic model description. Buyers should ask how the proposed deck count, screen area, motion, inclination and media arrangement relate to their feed and required products. The purpose is not to demand one preferred design before engineering review. It is to make the supplier show the link between process conditions and the offered machine.

Decks and product streams

Each deck creates or controls a separation, but the number of decks alone does not establish performance. The top deck receives the coarsest and often the highest-impact material. Lower decks process material that has already passed through another surface and may contain a greater concentration of fines or near-size particles. The quotation should identify the aperture and media type proposed for each deck, not simply state “multi-deck screen.”

Feed presentation and distribution

A screen cannot use its full area if material enters as a narrow, deep stream on one side. The upstream conveyor, feed chute and impact zone should spread the material without creating excessive drop impact or uncontrolled segregation. Buyers should therefore review the screen together with its feed interface. If the supplier excludes the feed chute, the quotation should still define the inlet geometry and loading assumptions that the buyer’s chute designer must meet.

A dimensioned general arrangement should make the handover point visible: conveyor discharge location, feed-box opening, material-flow direction, elevation and the space reserved for access. These dimensions do not prove screening efficiency, but they reveal whether the assumed feed presentation can be built at site. A mismatch may force chute rework, create off-centre loading or reduce the effective area available for stratification. The approval decision should therefore connect the process assumption to the physical interface rather than reviewing the screen and chute as unrelated items.

Screening media and maintenance access

Wire, plate, rubber, polyurethane and other media choices can create different trade-offs in open area, wear, impact resistance, noise and blinding behavior. The correct choice depends on the application. Ask the supplier to identify the offered media, fixing method, aperture, wear-zone arrangement and replacement access. A lower equipment price can lose its advantage if media scope is unclear or routine replacement requires unplanned structural work.

Open area, aperture geometry and media thickness interact with the material rather than acting as independent catalogue features. A media option selected for impact or wear resistance can provide a different effective open area from another option with the same nominal aperture. Where moisture or clay may cause blinding, the supplier should state the condition assumed and the proposed mitigation or operating limitation. The buyer can verify the offer through a deck-by-deck media schedule that identifies aperture, panel or section size, fixing method and quantity. That schedule later becomes a reference for replacement ordering and incoming inspection.

Evidence That Makes a Vibrating Screen Offer Reviewable

A serious evaluation goes beyond a product photograph and a capacity range. For the proposed vibrating screen configuration, request a design-basis summary that repeats the feed data and separation targets used for selection. If the supplier has changed an input, the change should appear as a visible assumption or deviation.

The quotation package should normally make the following items reviewable:

• offered equipment identity and number of decks;
• design feed rate and the definition of that rate;
• feed gradation, density and moisture assumptions;
• proposed product cuts and deck-media arrangement;
• overall dimensions, operating weight and interface points, where available for quotation review;
• drive, guarding, lubrication and control boundary;
• included wear parts, commissioning spares and optional items;
• required site utilities and responsibilities;
• documentation and inspection deliverables;
• clear exclusions and deviations.

A general arrangement drawing helps the project team evaluate fit, access and connections. It does not by itself prove the separation result. Conversely, a performance statement without a layout cannot confirm that the machine integrates with the plant. Buyers need both process-basis evidence and physical-interface evidence.

Each document answers a different approval question. The design-basis sheet should repeat the feed gradation, moisture, density, capacity definition and product cuts used for selection. The deck schedule should show how those cuts translate into media. The general arrangement should identify footprint, elevations, feed and discharge geometry, service access and lifting space. The inclusion list should define what the seller will supply, while the deviation list records where the offer does not follow the RFQ. A document title alone is not evidence; the values and interfaces inside it must match the purchase basis.

How Can Buyers Compare Price Without Ignoring Lifecycle Scope?

Price comparison should use a normalized scope sheet. Put each supplier’s response on the same rows and mark every item as included, excluded, optional or requiring review. Separate the base machine from media, chutes, structural support, electrical controls, recommended spares, supervision, commissioning and freight. This makes the commercial difference visible without pretending that all options have identical technical value.

Operating risk should also be reviewed, but not through unsupported claims about service life. Ask which components are considered wear items, how they are accessed, what inspection intervals the supplier recommends, and which spare-part information will be provided. For abrasive or variable feed, the buyer may also request alternative media or wear-zone options as separately priced choices. The supplier should explain the conditions under which each alternative is appropriate.

Only after the technical basis, supply boundary and deviations are aligned should the buyer compare factory price, delivery schedule and payment terms. A higher initial quotation may include items omitted elsewhere; a lower quotation may still be suitable if its exclusions match the buyer’s planned local scope. The correct decision depends on total project responsibility, not a universal rule that one price level is better.

The conclusion also changes when the buyer is replacing an existing screen rather than designing a new line. A replacement project may be controlled by fixed support centres, feed and discharge elevations, drive clearances and shutdown duration. In a new plant, the process designer has more freedom to adjust surrounding equipment. The RFQ should state which interfaces are fixed and which may be optimized; otherwise a technically capable screen may still create extensive site modification.

Which Red Flags Require Clarification Before an RFQ Becomes a Purchase Order?

• The capacity is stated without saying whether it is fresh feed or total circulating load.
• The screen is selected from maximum lump size only, without a representative gradation.
• The number of decks is shown, but aperture and media are not identified.
• Moisture or sticky fines are known project conditions but absent from the design basis.
• The quotation says “complete equipment” while supports, chutes, controls or guards remain undefined.
• The supplier proposes a different cut size or feed limit without recording a deviation.
• No drawing or interface document is scheduled before production approval.

These points do not automatically disqualify an offer. They indicate that the buyer cannot yet compare it on a common basis. Resolve them in the quotation revision and carry the agreed values into the purchase order and approved drawings.

Build an RFQ That Produces Comparable Responses

A useful RFQ package can be concise if its data is specific. Send the application and screening duty because they define what the separation must accomplish. Provide a representative feed analysis, normal and peak rates, moisture range and near-size content because those inputs determine loading and the difficulty of each cut. State required product fractions and acceptable carryover so the supplier can distinguish a capacity target from an accuracy target. Operating hours, layout constraints, available power and environment affect mechanical and electrical scope, while the document list defines what procurement will use for approval and acceptance. Attach a process flow diagram or mark up the expected feed and discharge interfaces when available.

Ask every supplier to return the same response structure: confirmed design basis, offered configuration, included scope, optional scope, deviations, required buyer inputs and documents to be issued after order. Require the response to distinguish values already confirmed from items that remain preliminary. A preliminary chute interface, for example, should not silently become a production dimension. This approach gives procurement, engineering and quality teams one review trail and makes the approved quotation, drawing revision and purchase order consistent.

Buyers preparing a project-specific comparison can submit those details through Ruilong’s crushing and screening project inquiry page. Request that the response identify the offered vibrating-screen duty, configuration, supply boundary and any deviation before price and delivery are approved.