Nibco W-920-W-LF Check Valve -...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,387.90
Nibco W-920-W-LF Check Valve - Lead-Free*, Class 125, Wafer Style, Buna-N Seat

Nibco W-920-W-LF Check Valve - Lead-Free*, Class 125, Wafer Style, Buna-N Seat

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Model: NLN50XJ

In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,387.90
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Check valves prevent backflow by automatically closing when fluid reverses direction. The check valve is recommended for commercial and industrial water applications only. Wafer checks may be installed in horizontal positions (or vertical with flow moving up). Please refer to NIBCO technical data sheets, chemical resistance guides and catalogs for engineering and installation information. Choose NIBCO® check valves for the most specified, versatile and economical valve option in commercial, mechanical and industrial applications. NIBCO® check valves are backed by the NIBCO 5-year 125% limited warranty.

  • 250 psi/17.2 bar non-shock cold working pressure
  • Maximum temperature 180-DegreeF/ 82-DegreeC
  • Resilient Buna-N seat molded to body
  • Renewable twin bronze discs
  • Spring actuated
  • To be installed between standard flat face flanges
  • Class 125 wafer end connections
  • Lead-free*
  • NSF/ANSI/CAN-61 and 372

Twin Disc Check Valves KW900WLF-W920WLF IOM Manual

Manufacturer Resources

Spec Sheet

Product Specs

All Application(s):
Lead-Free
All Basic Material:
Cast Iron
Classification:
Inline Lead-Free
End Connection:
Wafer
Product Group:
Valve
Seat Seal Material:
Buna-N Nitrile Rubber
System Use:
Lead Free*
Type of Check Valve:
Inline;Twin Disc
Type of Valve:
Check Valve
Valve End Connection Type:
W -- Wafer
Valve Pressure Rating (CWP):
250 PSI / 17.2 Bar CWP
Product Subgroup:
Valves
Product Type:
Inline Lead-Free
Department:
Plumbing
Product Height:
3.25 in
Product Weight:
13 lb
Product Length:
7.56 in
Country Of Origin:
United States
Product Width:
7.56 in

Nibco NLN50XJ – Frequently Asked Questions

1) Can the Nibco W-920-W-LF wafer check valve be installed vertically, or does it have to be horizontal?
The W-920-W-LF twin disc wafer check can go in horizontal runs, or in vertical piping as long as flow is moving up. It is spring actuated, which is what lets it close against gravity in an upward-flow riser. Do not install it in a vertical line with downward flow.
2) What pressure and temperature can the Nibco W-920-W-LF handle?
250 psi / 17.2 bar non-shock cold working pressure, with a maximum temperature of 180 F (82 C). That temperature ceiling comes from the Buna-N seat molded into the body, so it suits domestic water and general commercial water service rather than high temperature systems.
3) Is the Nibco W-920-W-LF approved for potable water?
It is a lead-free valve certified to NSF/ANSI/CAN 61 and 372, which is the potable water requirement. Nibco recommends it for commercial and industrial water applications.
4) What is the body and seat made of on the W-920-W-LF?
Cast iron body with a resilient Buna-N nitrile seat molded directly to it, and renewable twin bronze discs. Check Buna-N compatibility against your fluid before using it on anything other than water.
5) Twin disc wafer check versus a swing check, which should I use?
The W-920-W-LF is a spring actuated twin disc design. The two discs fold closed on spring force the instant flow reverses, so it closes fast and short, and the wafer body takes up almost no face-to-face room between flanges. A swing check needs a longer body and relies on flow and gravity, which normally means horizontal installation only. If you are tight on space or need the valve in an upward vertical run, the twin disc wafer is the one to use.
6) What pipe size does the Nibco W-920-W-LF wafer check come in?
It is offered in 5 inch, under MPN NLN50XJ. Size your flanges and bolting to match Class 125 flat face flanges at that size.
7) Can I rebuild a W-920-W-LF instead of replacing the whole valve?
The twin bronze discs are renewable, so the wear parts inside can be serviced rather than scrapping the valve. The Buna-N seat, though, is molded to the cast iron body and is not a drop-in replacement part.
How fast can I get the Nibco NLN50XJ delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Nibco NLN50XJ come with a warranty?
Absolutely. The Nibco NLN50XJ is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Nibco NLN50XJ?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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