Wafer check valves are essential devices employed in regulating and controlling the flow of water within water and wastewater treatment plants. Their simple yet effective design allows for quick and precise adjustments, making them ideal for managing the diverse and dynamic conditions encountered in treatment processes.
Hayward Flow Control recently announced the addition of large
10- and 12-inch sizes to its WCV Series Full Pattern Wafer check valve line. The large diameter WCV Series features a thermoplastic injection molded construction with a revolutionary angle seat and disc design. Integral bolt eyes and hand grip are molded into the body for ease of installation and safety. The unique seat and disc design allows for high flow capacities exceeding other thermoplastic wafer checks, and equal to or better than most metal wafer checks, according to Dave Stewart, director, business development and international sales for Hayward Flow Control. The full pattern design also eliminates the need for spacers or specialty flanges allowing for easy installation.
“The WCV Series is designed for multiple market segments, including aquariums, aquaculture, waterparks, municipal water and wastewater, clean water technology, as well as chemical handling,” he says. “Basically, they would fit any applications where corrosion and chemical resistance or sensitive media is an issue.”
The 10- and 12-inch valves are available in PVC and CPVC materials. Both sizes have maximum pressure rating of 150 psi nonshock at 70 degrees F and fit ANSI 150 Class flanges. The 10-inch size DN250 valves will also fit PN10 flanges.
“PVC and CPVC materials provide excellent chemical and corrosion resistance,” says Stewart. “We then offer the o-ring seals in EPDM and FPM materials as such to meet the chemical resistance required.”
Other key features include a one-piece disc and shaft design, O-ring disc seal, 316 stainless steel or Hastelloy springs, FPM or EPDM O-ring face seals, lower closing pressure than swing check valves, no exposed fasteners or retainer clips, the ability to install in a vertical or horizontal position, and ease of repair.
“When we first developed the design for the 2- through 8-inch sizes, we did customer surveys to end users, engineering firms and maintenance staff as part of our voice of the customer research,” says Stewart. “The goal was to have the best flow rate in the industry and compete against more expensive swing check valves, which it has done very well.” 888-429-4635; www.haywardflowcontrols.com
