Check Valves · Customisation & quotation guide
Requesting a Quote for Check Valves
A check-valve quotation is a closure-dynamics quotation: the construction decides closing speed against water hammer, so the line conditions around the valve matter as much as size and class. 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 | Decides body and disc materials and the media conditions the closure sees. |
| Flow velocity and line size | Closure dynamics and slam behaviour track the reverse-flow velocity at shutoff. |
| Water-hammer sensitivity | Construction decides closing speed — spring-assisted nozzle, dual plate and silent designs close fastest. |
| Cracking pressure | The valve must open fully at the available differential or it chatters and wears. |
| Orientation | Gravity-closure designs slam more in vertical pipe; spring designs close faster there. |
| Pressure class | Pressure class and temperature fix the pressure-boundary rating. |
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 | DN15 to DN1500 | Line size and flow velocity — closing behaviour tracks both |
| Pressure class | ANSI Class 125 to Class 2500 (PN10 to PN420) | Class or PN rating beyond the published span |
| Materials | WCB (ASTM A216), CF8, CF8M (ASTM A351), F316, F316L (ASTM A182), F51/2205 duplex (ASTM A182), F53, F55/2507 super duplex (ASTM A182), F11, F22 alloy (ASTM A182), GG25 cast iron (EN 1561), GGG40, GGG50 ductile iron (EN 1563), C95400, C95800 aluminium bronze (ASTM B148) | Seawater, sour or corrosive-media executions beyond standard carbon and stainless |
| End connections | Flanged, Butt Weld, Wafer, RTJ | Wafer, flanged or threaded ends to mate the pipework |
| Construction | Swing, Dual Plate (wafer), Single Plate, Tilting Disc, Lift, Non-Slam Swing, Pressure Seal Swing, Forged Steel Swing | Swing, dual plate wafer, tilting disc, lift or pressure-seal swing per closing-speed need |
| Installation orientation | Swing check valves are most common horizontally with hinge/cover orientation critical to closure; vertical down-flow is design-sensitive and requires confirmation. Spring-loaded designs are more orientation-flexible, but spring-loaded does not automatically mean suitable for all positions. | Horizontal or vertical line — gravity-closure designs are orientation-sensitive |
| Design standards | API 6D, API 594, ASME B16.34, EN 12334 | Testing standards the project specification 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, materials, end connection and allowable installation orientation.
Pump and flow data
Pump discharge or line duty, flow velocity and the water-hammer sensitivity of the system.
Cracking-pressure requirement
The available differential in low-load lines — a setting higher than the differential leaves the valve partly open.
Media conditions
Media, temperature and any solids — poor matching shows up as disc flutter, noise or early wear.
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 check-valve quote?
Size, pressure class, construction, end connection, media and temperature, flow velocity, installation orientation and the water-hammer sensitivity of the system. An inquiry carrying these moves directly to quotation.
Which construction is quoted for non-slam pump discharge?
Spring-assisted nozzle, dual plate and silent designs close fastest, while long-stroke gravity designs such as ball and swing carry the greatest slam potential. State the pump data and the quote confirms the construction.
How are lead time and MOQ handled?
Lead time and minimum order quantity depend on size, class, materials and construction 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.
Ready to request a quote for check valves?
The inquiry form is on the Check Valves product page — submit the parameters above there, answered with selection, documents and terms.