SKU: 45537043318

12 Underwriters Laboratory/Factory Mutual Flanged Swing Check Valve

Sale price$486.04 Regular price$540.04
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Description

12 Underwriters Laboratory/Factory Mutual Flanged Swing Check ValveThe 12 Underwriters Laboratory Factory Mutual Flanged Swing Check Valve is a one way valve designed to prevent backflow in fire protection and water systems. It is UL Listed and FM Approved, ensuring compliance with fire safety standards. The swing type disc mechanism allows flow in one direction and automatically closes when flow stops, preventing reverse flow. Designed for use with or without a lever and weight. A spring kit is also available for

The 12 Underwriters Laboratory/Factory Mutual Flanged Swing Check Valve is a one-way valve designed to prevent backflow in fire protection and water systems. It is UL Listed and FM Approved, ensuring compliance with fire safety standards. The swing-type disc mechanism allows flow in one direction and automatically closes when flow stops, preventing reverse flow. Designed for use with or without a lever and weight. A spring kit is also available for alternative operation.

Specification Details
TYPE Flanged Swing Check Valve
DESIGN Optional lever & weight or spring assist, helps control closure speed and reduce water hammer
MATERIAL Iron for strength and impact resistance
WEIGHT (LBS) 509.000
ADDITIONAL INFORMATION 698 mm Length, 483 mm Dia, 32 mm Flange Width, 432 mm Flange Hole Distance, 12 Holes, 25.4 mm Hole Diameter
BODY MATERIAL Ductile Iron
DISC MATERIAL Ductile Iron
CONNECTION TYPE Flanged
INLET TO OUTLET LENGTH 698 mm
NOMINAL SIZE 12"
OPENING SIZE 300 mm
PACKING MATERIAL Stainless Steel
PRESSURE RATING 300 psi
SEAL MATERIAL Rubber
SEAT MATERIAL ASTM B62 C83600 Brass Copper Alloy
TOP TO INLET CENTER 358 mm
TRIM MATERIAL Stainless Steel
APPLICATIONS Ideal for Fire Protection Systems, Municipal Water & Wastewater Systems, Pumping Stations, Industrial & Process Water Systems, HVAC & Cooling Systems
BRAND Midland Industries

 

Link to Midland Industries Catalog

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 45537043318

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4.5 ★★★★★
Based on 25 reviews
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Randy J.
Battle Creek, US
★★★★★ 5
Very nice.
Color: Carbonized Bamboo(Brown)
Look great,we will see how long they last.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
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Verified Purchase
Amazon Customer
Charlottesville, US
★★★★★ 5
Good and sturdy
Color: Carbonized Bamboo(Brown)
Good quality and affordable love that it has a stand
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
L
Verified Purchase
Lisa Schafer
Charlottesville, US
★★★★★ 5
Nice quality
Color: Carbonized Bamboo(Brown)
I really love these boards. Feel good to handle and cut on. Easy to clean and has a little stand for them. This would be a great house warming gift .
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Reviewed in the United States on March 7, 2026
M
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marvin menodza
Port Orchard, US
★★★★★ 4
Nice but discolors after couple of washes
Color: Carbonized Bamboo(Brown), Color: Carbonized Bamboo(Brown)
The color lightens up a bit after washing but they are nice looking and sturdy.
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Reviewed in the United States on January 16, 2026
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Verified Purchase
Brittnae
Waukegan, US
★★★★★ 5
Sturdy, Natural Option for Everyday Kitchen Prep
Color: Carbonized Bamboo(Brown), Color: Carbonized Bamboo(Brown)
I was pleasantly surprised by these. They have a clean, natural wood smell and feel pretty durable. On the first couple uses, they were slightly rough and the edges felt a bit sharp, but that improved noticeably after a few washes. Now they feel much smoother. The size variety is a big plus—I’ve been able to use them for multiple purposes like prepping vegetables, fruits, and even meats. Overall, a solid value for the price, especially if you’re trying to replace plastic items with something more natural.
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Reviewed in the United States on March 20, 2026

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