Lead-Free, Metal-To-Metal Swing Check Valves Certified For Drinking Water

Lead-Free, Metal-To-Metal Swing Check Valves Certified For Drinking Water
Swing check valves from Val-Matic Valve & Manufacturing

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Swing check valves from Val-Matic Valve & Manufacturing, offered with either drop-tight resilient seating or aluminum bronze metal, are designed for municipal and industrial water and wastewater applications. The valves are made of ductile iron and have a cold working pressure rating of 250 psi.

Both the removable metal body seat and integral disc seat are made from C95400 aluminum bronze. Valve sizes range from 8 to 48 inches. Metal seating is standard on the Series 7900 oil cushion valves and is an option on Series 7800 air cushion valves.

“The swing check valve has been used for years in both water and wastewater and many industrial applications as well,” says Dave Scott, national sales manager, Val-Matic Valve & Manufacturing. “It’s a design that’s tried and true, and many engineers still specify it. A lot of times it’s a customer preference. Some customers just prefer the metal-to-metal seating even though the resilient-seat valve would be fine.”

Val-Matic’s metal-to-metal seated valves, introduced this year, are built and tested for compliance with ANSI/AWWA C508, as well as NSF/ANSI 61 certified for drinking water and NSF/ANSI 372 certified lead-free. The valves also conform to MSS SP-71/MSS SP-136 standards. End connections are made in accordance with ASME/ANSI B-16.1 Class 125 and ASME B-16.42 for ductile iron flanges.

The Series 7900 oil cushion valves include single- or dual-level arms with weights, and either side or bottom oil cushions. The bottom oil cushion provides adjustable control of the final 10 percent of disc closure. The side oil cushion allows for independent adjustment of closure speeds in either two or three stages. Applications include single- or multiple-pump systems to reduce slamming and pressure surges.  

“When you stop the flow you want to prevent anything from back-spinning your pump,” Scott says. “A check valve is used to prevent that.”
Both Series 7800 and Series 7900 check valves are fully coated with NSF/ANSI 61 certified fusion-bonded epoxy per AWWA C550 for corrosion resistance and extended service life.

Features include a full-domed, easy maintenance access cover that can accommodate a release valve or pressure gauge.

630/941-7600; www.valmatic.com.


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