Procurement guide

How to Compare Check Valves for Reverse-Flow Requirements

Direct answer: A check valve comparison should identify the reverse-flow requirement, requested check valve type, flow direction, installation orientation, size, pressure rating, materials, connection, medium, temperature, quantity, and required documents.

Information to Compare

  1. Function and typeDescribe the reverse-flow requirement and state the requested swing, lift, dual-plate, or other check valve type if specified.
  2. Flow and orientationProvide flow direction and horizontal or vertical installation information when the project defines it.
  3. Size and pressureList DN or NPS and PN or pressure class for every line item.
  4. MaterialsState body, disc, seat, spring, or trim materials when specified.
  5. ConnectionIdentify flanged, wafer, threaded, welded, or another required end connection.
  6. Operating conditionsProvide medium, operating temperature, and relevant project constraints.

Buyer Questions

Why is installation orientation useful for a check valve inquiry?

Orientation is part of the operating context and can affect which details require confirmation before a product is quoted.

Can a check valve be selected from pressure class alone?

No. Size, type, connection, materials, medium, temperature, orientation, and project requirements should also be reviewed.

What should I send when the exact check valve type is unknown?

Share the piping data, reverse-flow requirement, operating conditions, connection, size, pressure, quantity, and any project specification for confirmation.

Prepare the Inquiry

Use the checklist to organize known requirements and mark missing fields for confirmation.

Send Your RFQ or BOM