Butterfly Valves · Customisation & quotation guide
Requesting a Quote for Butterfly Valves
A butterfly-valve quotation turns on offset geometry, seat chemistry and the throttling duty: the offset count decides seat life and sealing, and a seat rating is not automatically the body rating. The parameters below are what a quotation-ready inquiry states up front.
Last updated: 2026-11
Required inquiry parameters
An inquiry that states these values is quotation-ready — selection can start without a second round of questions.
| Parameter | Why the quote needs it |
|---|---|
| Medium | Seat choice is chemistry first — each seat family carries media exclusions. |
| Offset geometry | Concentric, double offset and triple eccentric separate seat wear, temperature and tight-shutoff duty. |
| Temperature | Seat material windows and metal-seated executions track the service temperature. |
| Throttling duty | Partly-open operation brings cavitation, dynamic torque and actuator hunting — sizing uses Cv data. |
| Pressure class | Class fixes the pressure boundary; the seat rating is not automatically the body rating. |
| Connection | Wafer, lug, double flanged or grooved ends must match the pipework and maintenance plan. |
Standard ranges and custom options
Published reference ranges for this family, with the question to ask for each dimension when the requirement sits outside the span. Non-standard requirements are confirmed during quotation.
| Dimension | Published range | If non-standard, specify |
|---|---|---|
| Size | DN40 to DN2000 | Face-to-face series per the project flange landscape |
| Pressure class | PN10 to PN63, ANSI Class 150 to Class 1500 | Class or PN rating, noting seat rating versus body rating under API 609 |
| Materials | WCB (ASTM A216), CF8, CF8M (ASTM A351), F316L (ASTM A182), F51/2205 duplex (ASTM A182), F53, F55/2507 super duplex (ASTM A182), C95400, C95800 aluminium bronze (ASTM B148) | Carbon steel to super duplex and aluminium bronze for seawater duty |
| End connections | Wafer, Lug, Flanged | Wafer, lug, double flanged or grooved ends per the pipework |
| Seat construction | Molded tongue-and-groove elastomer seat construction is used in hydronic resilient-seat executions: the molded profile lowers operating torque and provides bubble-tight shutoff. | Seat material chemistry window for the medium — EPDM, NBR, PTFE or FKM each have exclusions |
| Seat leakage class | Resilient seats can often achieve bubble-tight shutoff, typically equivalent to ANSI/FCI Class VI leakage performance; many metal-seated designs target lower leakage classifications such as Class IV. | Leakage requirement the project specification demands |
| Design standards | API 609, ASME B16.34, MSS SP-67 (where applicable), EN 593, BS 5155 | API 609 category and testing standards the project requires |
Drawings and documentation
What to attach to the inquiry — and what to ask for back with the order confirmation.
Line specification excerpt
Size, rating, body and seat materials, end connection and API 609 category.
Media chemistry
The medium decides the seat: EPDM fails on hydrocarbons, NBR not on ozone or hot water, PTFE nearly universal but cold-flow creep, FKM raises temperature with its own exclusions.
Duty split
Isolation or throttling — throttling duty must be sized as a control valve against Cv data.
Cycling and actuation
Cycling frequency, torque data and actuation supply for automated valves.
Documents to request with the order
General arrangement drawing, material certificates and test reports — availability confirmed with the quotation.
Lead time, MOQ and pricing
Supply terms are quoted per inquiry — size, class, materials and certification scope all move them, so they are confirmed rather than published as generic figures.
| Lead time | Contact for confirmation |
|---|---|
| Minimum order quantity | Contact for confirmation |
| Price and validity | Contact for confirmation |
Frequently asked questions
What is the minimum information for a butterfly-valve quote?
Size, pressure class, end connection, media and temperature, seat material and leakage class, offset requirement and whether the duty is isolation or throttling. An inquiry carrying these moves directly to quotation.
Is the seat rating the same as the body rating?
No — a seat rating is not automatically the body rating under API 609. State the medium and temperature and the quote confirms both ratings explicitly.
How are lead time and MOQ handled?
Lead time and minimum order quantity depend on size, materials, seat configuration and actuation scope and are provided per inquiry — contact for confirmation rather than relying on a generic figure.
Ordering & documentation
Documents
Ask for the documentation set with the inquiry — typical items (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
Send the medium, temperature, pressure, size and connection for a quotation-ready inquiry. Lead time, MOQ and price are confirmed at quotation, together with the documents to be supplied with the order.
Sample & supply
Supply terms, order quantities and lead time are agreed per order — state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, and keep end-face protectors on until installation; storage limits and shipping arrangements for the selected materials are confirmed at quotation.
Knowledge: selection guides
Ready to request a quote for butterfly valves?
The inquiry form is on the Butterfly Valves product page — submit the parameters above there, answered with selection, documents and terms.