What to Prepare Before Requesting a Valve Quotation

There is a type of quotation request that lands in a manufacturer's inbox and gets quoted within a day. There is another type that bounces between buyer and seller for a month, accumulates dozens of clarification emails, and finally comes back with so many assumptions attached that comparing offers is impossible. The difference between the two is almost never the valves themselves. It is what the requester prepared before hitting send.

If you have ever received three quotes for the same scope with prices that differ wildly and footnotes that contradict each other, you already know how this ends: nobody can compare the offers, the cheapest one wins, and the site inherits whatever shortcuts hid inside it. Most of that pain is avoidable at the preparation stage. Here is what is actually worth gathering.

Operating Data, Not Just Design Data

The single most common gap in a quotation request is process data that only covers the design case. Design pressure and design temperature define the pressure class, sure, but they say almost nothing about how the valve will actually live. A valve on a line that normally runs warm and occasionally sits cold behaves differently from one that sees the reverse, and seat materials, gasket choices, and even body styles depend on it.

For every line in the enquiry, try to capture:

• The medium, honestly described — clean water, produced water with sand, gas with droplets, steam, hydrocarbons with aromatic content
• Normal operating pressure and temperature, plus the realistic minimum and maximum, not just the design point
• Flow rates at normal, maximum, and where relevant, minimum operating conditions
• For control positions: the pressure drop the valve is expected to take, at those flow rates
• Any upset conditions the valve must survive, even briefly — vacuum on a line designed for pressure is the classic one

Design data is what you certify against; operating data is what you select against. A quotation built only on design data is a quotation built on guesses, and the manufacturer will either ask you the questions you should have answered, or quietly assume something optimistic. Both cost you later.

Size, End Connections, and What the Pipeline Already Decided

Give the nominal size and pressure class per line, and be explicit about the standard you are working in. ASME classes and PN ratings are not interchangeable shorthand, and an enquiry that mixes them carelessly invites an offer in the wrong frame. State the end connections per line: flanged, with which flange standard and facing; butt-weld, with wall thickness; threaded; wafer or lug for butterfly patterns. If the piping specification already fixes these, attach the relevant sheet rather than paraphrasing it.

This is also the moment to mention space and weight constraints, orientation requirements, and any installed basis — an existing installation where the new valve must drop into a bolt pattern that predates everyone in the meeting. Buyers often treat these as details for later. They are not. A valve quoted without the installed constraint, then found oversized or overlong during construction, becomes a change order with the leverage entirely on the other side of the table.

Valve Type Tendencies, Leakage, and Actuation

You do not need to fix the valve type for the manufacturer — that is partly their job, and a good applications team will push back on a bad choice. But you should state your tendencies and constraints. If your site standardizes on one family for a given service, say so. If you refuse certain types for a given service for maintenance or safety-history reasons, say that too. A quotation that proposes something your plant will never accept is wasted effort on both sides.

Leakage expectations deserve a real line in the enquiry, not an afterthought. State the sealing direction — upstream or bidirectional — and the leakage class you need, and distinguish between the seats you care about and the ones you do not. Many projects pay for a tightness class on positions where it buys nothing, and under-specify it on positions where it buys everything. That is a trade worth making consciously.

For actuated positions, say where the actuation specification comes from. If the actuator, solenoid, limit switches, and positioner are covered by another package or a preferred maker list, write that down. If you expect the valve manufacturer to propose and integrate the actuation, say that, and hand over the utility conditions: available air pressure, electrical supply, fail action per position, and any SIL or safety requirement. Ambiguity here is the classic source of a quote that looks complete and quietly excludes everything that bolts onto the valve.

Documentation, Inspection, and Delivery Expectations

Be explicit about paperwork. Which certificates do you actually need — material certificates to which level, pressure test reports, NDE reports, hydrostatic records, coatings certificates? Which documents do you want at delivery — IOM manuals, performance test sheets, tagging photos? Documentation requirements vary enormously between quotes, and they are a genuine cost item. Asking for everything by default inflates every price; asking for nothing pushes the negotiation to delivery, when you have no leverage.

State your delivery expectations honestly, including the site constraints that shape them: shutdown windows, export packing, third-party inspection visits, and whether partial shipments are acceptable. And be honest with yourself about which dates are real. A quoted delivery date that starts when your enquiry stops changing is not the date on the quote; it is the date the last clarification closed. Enquiries that arrive complete start their clock immediately, which in practice can matter more than any price difference between offers.

What an Incomplete Enquiry Actually Costs

It is tempting to treat preparation as overhead and let the clarifications sort it out. The bill arrives anyway, in less visible forms. Offers built on different assumptions are not comparable, so the evaluation degenerates into price comparison, which rewards whoever assumed the most. Each clarification round adds latency, and delivery clock time quietly burns while everyone waits. And every assumption the manufacturer had to make is a decision your project made by accident, discovered at FAT, at delivery, or at the weld neck.

A disciplined enquiry sheet — one page per line or per group of identical lines, with the operating data, connections, leakage, actuation, documentation, and delivery expectations filled in — collapses most of this. It does not need to be beautiful. It needs to be complete enough that the manufacturer can quote without inventing.

If your enquiry format has not been pressure-tested recently, it is worth sending it to the manufacturer you intend to work with and asking what is missing. An experienced maker that produces the full valve range in-house — ball valves, control valves, gate valves, globe valves, check valves, strainers, knife gate valves, plug valves and butterfly valves — knows exactly which blanks cause the most rework. Send your standard enquiry sheet to the manufacturer's applications team and ask for a per-position proposal on a live scope; the questions that come back will tell you what to fix in your own template.