Mueller’s Singer 106/206 PGM-2PR-630-SM (image courtesy of Mueller)
Its design has reliability in mind, where the pressure is hydraulically managed by the valve to “reduce water loss, save money and prevent pressure spikes that contribute to premature pipe failure”, as reported by ValveWorld and Fluid Handling Magazine.
Built on the Singer 106PGM or 206-PGM main valve, a simple field retrofit is possible using the paddle style orifice plate.
The valve switches between high and low pressure pilots based on flow rate. The pressure reducing pilots independently adjust to suit the optimal downstream pressure. The valve requires no electrical power or independent flow signal, as it takes its flow signal from an orifice plate installed on the valve inlet. The integral backup system protects against diaphragm or pilot failure, reducing the need for immediate service.
The valve is available in sizes 4-12 inches (DN100-DN300) with a minimum pressure at the valve inlet of 2 bar.