7 Things to Check Before You Request a Quote on Vibratory Screening Equipment

If you're ordering vibratory screens, separators, or finishing machines for a mine, quarry, or oilfield site, this is the seven-gate checklist I run before I call any supplier. I've handled orders like these for almost eight years now. The first two, I guessed my way through. Now I run a checklist. The difference? A 2022 screen-mesh mismatch that cost $4,200 and a three-week production delay.

Who this checklist is for

If any of these sound like you, it'll save you at least one rework round:

• You're buying your first vibratory separation unit for a project and have equipment specs but no material report.
• You're switching suppliers and want an inquiry template that doesn't miss anything.
• You're comparing Sweco equipment against other brands and aren't sure which dimensions matter.

Seven steps total. From material confirmation to quote verification, in order.

Step 1: Check the material before you open the spec sheet

When I first started handling these orders, I assumed the job was comparing parameters — amplitude, screen surface size, throughput. Wrong. My first big miss happened back in 2017. I sized a Sweco vibratory screen for a standard test material. The actual feed had over 12% clay content. The screen blinded within two days.

The numbers on a spec sheet are from a lab sample. Your actual feed — particle size distribution, moisture content, clay content — determines the screen media, aperture, and vibration frequency. Not the other way around.

Ask "what does this material actually look like in the plant." Get three data points: particle size distribution, moisture, and clay content. If your process engineer doesn't have a lab report, spend $200 to $400 on a particle size analysis. Cheaper than a screen change-out.

Step 2: Find out whether "screening efficiency" is nominal or guaranteed

Most spec sheets say "efficiency ≥95%." That's usually a lab figure under ideal conditions, not a contractual guarantee.

In 2021, I signed a contract that said "efficiency ≥90%." Field results came in at 78%. The supplier argued the test material moisture was different from ours. The contract didn't specify material conditions. Two months of back-and-forth, zero resolution.

Now I add one line to the inquiry: "Please state the material moisture and throughput range corresponding to that efficiency figure." One sentence, and a fuzzy promise becomes a checkable condition.

Step 3: Ask for references on similar material, not a case-study PDF

Every supplier has a polished case-study PDF. Limited reference value, because it only includes the wins.

My current approach: ask for two success cases plus one "we might have handled that better" case. Watch the phrasing — if you ask directly for a "failure case," nobody replies. Ask about "challenges you ran into," and people usually open up.

If a supplier is willing to talk about what went wrong and how they solved it, that's more useful than ten pages of success stories. On an oilfield project last year, the sales contact proactively mentioned that a batch of stainless steel screens corroded faster than expected in a salt-spray environment and suggested a different coating. That kind of information is worth more than any brochure.

Step 4: Break "lead time" into three separate questions

Most people ask "how long until delivery." The answer comes back "8 to 10 weeks." You schedule around 10 weeks. Week 9 arrives, and the equipment is still waiting on an imported bearing.

I now break it apart:

1. Manufacturing cycle — from deposit received to equipment completion?
2. Factory acceptance test (FAT) scheduling — how long after completion until testing?
3. Shipping cycle — from factory to site, transit time, and does it include customs clearance?

One finishing machine order in 2023 had a six-week manufacturing cycle but a three-week FAT wait because the supplier's test bay was booked. That information stays hidden inside a single "total lead time" number unless you ask for the breakdown. Honestly, this is the split that saves project schedules most often.

Step 5: Request the maintenance list and the wear-parts price sheet

This is the step most people skip. The equipment quote is only the first payment. After that come screens, seals, bearings, and isolator springs.

I ask directly: "Please send the expected wear-parts list and unit prices for the first two years." Most suppliers have this sheet because their service teams already use it. If the answer is "we'll figure that out later," that itself is a signal.

Last year I compared two vibratory separation suppliers. Supplier A quoted 8% less on the machine but 40% more on screens, and the replacement frequency was 1.6x higher. On an 18-month total cost of ownership basis, A was actually 11% more expensive. That's the difference between transparent quoting and lowball quoting — one gives you the whole picture, the other gives you the opening number.

Step 6: Confirm the certifications match your actual site conditions

I'm not an electrical engineer, and I'm not a pressure-vessel specialist, so I can't tell you which certification level applies to your hazardous area. What I can tell you is this: have your site safety engineer confirm the requirement, then cross-check the supplier's certificate scope against it.

I once watched a team order standard industrial motors because nobody flagged the area classification. Equipment arrived, turned out the zone was classified as Zone 1. The entire motor batch had to be replaced — $9,000 and four weeks gone. Get the certification question on the table during the inquiry stage. Don't let the supplier make that call for you.

Step 7: Ask "what's not included?"

I start with "send me the price," then immediately follow with: "Please mark which costs are billed separately." Installation supervision, commissioning, operator training, spare parts, remote monitoring modules — these are usually outside the equipment quote.

A rule of thumb: the shorter the quote, the more gets added later. Suppliers who list the extras upfront — even if the total looks a bit higher — tend to settle lower at the end. The U.S. Federal Trade Commission's advertising and marketing guidance requires that supplier claims about product performance and maintenance costs be substantiated and not misleading (source: ftc.gov, Advertising and Marketing Business Guidance, accessed January 2025). Translation: you're allowed to ask for written backup on wear-part life and after-sale costs.

A few closing notes that matter more than the checklist itself

• "Sweco" isn't a single quote. The equipment line covers vibratory screening, finishing, and oilfield wellhead. Quotes and lead times vary significantly by factory and region. Confirm which plant and which business unit will ship your order. A unit shipped from Sweco Fab Inc and a European quote handled through Sweco København don't follow the same path.
• European offices usually include EU-standard certifications in their quotes. If your project is inside the EU, that saves you a second certification round. If it's outside, confirm the local acceptance of that standard.
• A spec sheet is not a substitute for pilot testing. Run your own material through the unit. Write it into the contract milestones, not as a "we'll try to arrange it."

This checklist won't get you the cheapest equipment. It'll make sure that on settlement day, the invoice doesn't have a line you weren't expecting.