Fluid Metering Awarded New Patent

Sept. 9, 2008
Valveless chlorination system works in applications including drinking water, waste treatment and swimming pools

Fluid Metering, Inc. is proud to have received a patent for its new Chloritrol valveless metering system for accurate, maintenance-free injection of sodium hypochlorite for purification of municipal drinking water.

Accurately metering liquid sodium hypochlorite presents a unique challenge because of the fluid’s tendency to out-gas. Many conditions, including elevated temperature, exposure to ultraviolet radiation, cavitation and contact with metallic and organic impurities, tend to increase sodium hypochlorite out-gassing.

The resulting gas bubbles present a condition known as “gas lock” which adversely affects the efficiency and accuracy of the injection pump’s output. This, in turn, can significantly reduce the amount of chlorine added and in the worst case, cause the pump to completely lose prime.

The Chloritrol system is a unique valveless duplex pump design. The first pump head is high-pressure and injects the sodium hypochlorite directly into the water main. The second pump head functions to remove out-gas bubbles from the inlet side of the high-pressure pump head.

Each pump head features Fluid Metering’s patented CeramPump pumping principle, which uses one moving part, a rotating and reciprocating ceramic piston which accomplishes both the pumping and the valving functions. Eliminating valves, typically present in other metering technologies, virtually eliminates costly downtime for repair and maintenance. Flow rate is controlled by Fluid Metering's Model V300 variable flow controller, which accepts 4-20 mA, 0-5 VDC and 0-10 VDC, signals from process sensors and instrumentation.

The Chloritrol has been field tested in demanding applications and demonstrated that it exceeds performance expectations. It is also noted that the size of the system, as well as energy consumption, is a fraction of that of conventional injection pumps.

In addition to sanitizing of drinking water, the Chloritrol can be used for accurate sodium hypochlorite addition for municipal swimming pools, water parks, resorts, food processing plants and waste treatment applications.

Source: Fluid Metering Inc.