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Description
10 Underwriters Laboratory/Factory Mutual Flanged Swing Check ValveThe 10 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 10 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 | 383.000 |
| ADDITIONAL INFORMATION | 622 mm Length, 406 mm Dia, 30.5 mm Flange Width, 362 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 | 622 mm |
| NOMINAL SIZE | 10" |
| OPENING SIZE | 250 mm |
| PACKING MATERIAL | Stainless Steel |
| PRESSURE RATING | 300 psi |
| SEAL MATERIAL | Rubber |
| SEAT MATERIAL | ASTM B62 C83600 Brass Copper Alloy |
| TOP TO INLET CENTER | 326 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 |
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Exchange/Return Notes
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4.9 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
edger
given as gift but I liked the weight and ease of handling. Seemed well made and simple to use. I was pleased with size and features.
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Reviewed in the United States on January 1, 2026
★★★★★ 3
Nice Edger as long as the blade doesn't come loose -- and it will come loose, repeatedly!
Probably could've/should've rated this 2 stars yet it works well when it works. I purchased this edger to edge my drive and sidewalks and not for trenching. The edger arrived very quickly after I ordered it (I am not a Prime member so this was a nice surprise). Assembly was easy and straight-forward. The first use went smoothly and the edger performed flawlessly and provided clean, smooth edging. About 20 minutes into the second use I noticed that the edger was cutting and quickly determined that the blade was spinning freely -- fortunately the hex nut was still attached to the threaded shaft. I reviewed the manual that came with the edger, grabbed the correct sized socket and torque wrench. I removed the hex nut, the first washer, the blade and then the second washer. To install I followed the directions ensuring that the flats of the washer aligned with the flat on the shaft and tightened the hex nut to the specified 140 in-lbs. The edger worked well for about 10 minutes and the blade once again became loose. This time I replaced the original blade (which did not need to be replaced from a wear perspective) with a new B&D blade and new washers. Once again I followed the instructions and this time the edger performed flawlessly until about 5 minutes remaining in my edging when once again the blade came loose. my experience has most certainly been frustrating to say the least. one should not need to carry a socket and torque wrench with them and repeatedly need to tighten the blade. So, when the edger performs as intended it does an excellent job at edging; however I have no confidence that this edger will be able to perform as intended throughout repeated uses and more importantly has shown that it cannot complete my edging without requiring tightening the blade (which requires disassembly down to the second keyed washer). Potential buyers should be prepared for this experience and make your decision accordingly. Note: I tried contacting black and decker via twitter (@blackdeckerhome) and never received a response; I could not find a separate customer service/support twitter account. Trying to contact customer service via the phone these days is an exercise in patience to say the least.
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Reviewed in the United States on November 11, 2022
★★★★★ 5
Trimmer results
Was alittle hesitant with this being B&D
But I was surprised how great it really is.
By far way above my expectations. Works like a charm and does a great job. Chose electric because I really don't have other than a driveway to do. But it really did good around the flower beds.
Cord limits you alittle but nothing to cry about. Quiet also but still use ear plugs.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Easy to use
Style: 20V Pwr Drv Trimmer (LST522-CA)
Light weight perfect for edging around the yard.
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Reviewed in the United States on April 24, 2026
★★★★★ 5
Works great-easy-breezy!
Style: 20V Pwr Drv Trimmer (LST522-CA)
Wifey loves this!
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Reviewed in the United States on April 26, 2026
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