In the world of municipal fluid control systems, resilient wedge gate valves are often the unsung heroes that ensure smooth and efficient flow. These robust and reliable components play a crucial role in maintaining the integrity of municipal water supply and sewer networks. In an effort to make these components more applicable, Mueller recently announced the addition of 60- and 66-inch resilient wedge gate valves for large transmission mains.
The 60- and 66-inch resilient wedge gate valves offer reduced operating torque and superior resistance to wear and tear that can reduce performance. With extra-long, bronze wedge guides, the gate slides easily within body channels, supporting and maintaining alignment of the wedge for smooth operation. According to Adam Donnelly, vice president at Mueller, the company developed these valves based on evolving municipal trends.
“There is a clear trend toward installing more large transmission mains across the nation’s water distribution systems,” he says. “This is driven by several factors, including increased capacity and demand as well as the replacement of aging infrastructure.”
The specially shaped rubber along the bottom edge of the wedge takes advantage of line pressure to augment the torque on the stem and ensure a leak-tight seal. This avoids crushing the rubber and reduces stress on the stem. When installed horizontally there is no need for rollers, tracks or scrapers. The valves are easy to install because both sides are symmetrical without a predefined flow direction. This reduces error factors during the assembly of the pipeline system or maintenance procedures. Opening and closing the valve requires a minor effort due to the movement of the mechanism, which is not directly against the flow like in some other valve designs. At high pressures, friction of the disc against its guides can be compensated with a bypass. In addition, less complex manufacturing implies higher reliability and lower maintenance. The gate valves also have great sealing performance aided by the flow pressure, helping maintain a tight union between the gate and the seat.
“These new large valves have been added to meet this demand and provide utilities with a quality product they can rely on,” says Donnelly.
The valve meets or exceeds all applicable requirements of ANSI/AWWA C515 Standard and certified to NSF/ANSI/CAN 61 and/or 372.
800-423-1323; www.muellercompany.com
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