Field-Adjustable Butterfly Valve Designed For Easy Maintenance

Field-Adjustable Butterfly Valve Designed For Easy Maintenance
American butterfly valve from Val-Matic Valve & Mfg. Corp.

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The American butterfly valve from Val-Matic Valve & Mfg. Corp. is designed to provide long life and trouble-free performance. Features include 360-degree uninterrupted seating, Tri-Loc seat retention system, traveling nut actuator with external adjustable stops, ductile iron disc, stainless steel seat retention hardware, shafts and body seats. All valves include two-part epoxy interior. Options include stainless steel and other materials, rubber linings and fusion-bonded epoxy coatings.

“The Val-Matic butterfly valve is manufactured with the end user in mind,” says David Scott, national sales manager for Val-Matic Valve & Mfg. Corp. “The resilient seat can be adjusted or replaced by the operator in the field simply by using a wrench.”

Stainless steel tangential tapered pins lock the valve shaft to the ductile iron disc using stainless steel nuts to prevent vibration.

“Vibration will wear a valve out prematurely,” Scott says. “With a tangential pin, because it’s on the side, you have undisturbed shaft material; you retain the integrity of the shaft. You’re not putting a pin or a hole through the center so the shaft material is much thicker, producing a stronger and tighter connection.”

The tapered pin design is also user friendly.

“You loosen the nut and tap out the pin with a soft-blow hammer,” he says. “Because it’s tapered it drops right out. It’s a nice feature, especially for performing maintenance.”

Suitable for water and non-solids wastewater, applications include shut-off service, modulating service, SCADA systems, buried/plant service, pump control and flow control. The valve fully complies with AWWA C504 and C516. It is NSF/ANSI 61 certified for drinking water and is NSF/ANSI 372 certified lead-free.

The valves are available in 150B and 250B AWWA classes with flanged end connections in sizes 3 to 144 inches and mechanical joint end connections in 4 to 48 inches. Wafer-style butterfly valves are designed with ANSI 125 flanges or ISO PN10 and PN16 flanges in sizes 4 to 24 inches.

While no special maintenance is required, a visual inspection is recommended whenever a filter is shut down. Scott suggests inspecting the disc edges to ensure they’re within tolerance and functioning properly. 630/941-7600;


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