Choosing a Dual Plate Check Valve Wafer Type Supplier: Series F16 Working Requirements and Integration Fit

1. Start with your flange standard

Flange compatibility is the first filter, and it decides which series you should ask about.

• Series F16 is listed as compatible with GB, DIN and BS flanges.
• Series F125, the sister version, is listed as compatible with ANSI 125/150 flanges.

The product data says the dual plate wafer check valve is available in both Series F16 and Series F125. If your pipeline uses ANSI 125/150 flanges, the F16 is not the right choice and you should look at the F125. If your project uses GB, DIN or BS flanges, the F16 is the version to evaluate.

2. Confirm design and testing standards

The published data for the F16 states:

• Designed to comply with API 594.
• Valve inspection and testing comply with API 598.
• Uses a dual plate design for efficient sealing.

If your project specification names these standards, they belong on your checklist. If your specification calls for other standards, certifications or third-party approvals, ask for supporting documents before you order. This article makes no claims beyond the standards listed above.

3. Check face-to-face length and installation space

The F16 face-to-face dimension follows ISO 5752 basic series 16 (wafer long). This matters if you are replacing an existing valve or working to a fixed pipe spool length. The published dimensions table lists dimensions A, B, C, D, E and L for each size. Examples of the listed L values:

Before you finalize a layout, ask for the dimensional drawing and confirm what each dimension letter means.

4. Match the size range to your project

The F16 dimensions table runs from 50 mm (2") to 1200 mm (48"). The listed sizes are 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000 and 1200 mm. If your line size is not in this list, confirm with the supplier before you assume it can be made.

5. Select materials for your medium

The published materials list for the F16 gives these options by component:

The published data does not give pressure ratings, temperature limits or chemical compatibility for these materials. Give the supplier your medium, operating pressure and temperature range so they can confirm the body, disc, seat and spring combination for your service.

When the Series F16 is not the right fit

• ANSI 125/150 flanged systems: choose the Series F125 instead. Its published data lists ANSI 125/150 flange compatibility and a wafer type body. The F125 excerpt gives sizes of 2" to 24", but its dimensions table includes larger sizes, so confirm the size you need directly.
• Lug-type or swing check requirements: the published F16 data describes a wafer type dual plate design only. It does not cover lug bodies or swing check configurations.
• Pressure, temperature or certification requirements not covered above: this data cannot confirm them. Ask for written confirmation before ordering.

Questions to ask your dual plate check valve wafer type supplier

For project or wholesale dual plate check valve orders, prepare these details in your inquiry:

1. Flange standard and pressure class of the mating flanges.
2. Nominal size and quantity for each size.
3. Medium, operating pressure and temperature range.
4. Preferred body, disc, seat and spring materials, or a request for the supplier to recommend them.
5. Required documents, such as API 598 test records or dimensional drawings.
6. Commercial terms. Price, lead time and packaging are not covered here and must be quoted by the supplier.

Working through these points helps you confirm early whether the Series F16 suits your system or whether the Series F125 is the better match.