Tuthill Magnetically Coupled External Gear Pumps operate by moving fluid between two spur or helical type gears (see Figure 3 below). The Tuthill W-series is magnetically coupled and contains no dynamic seals. The pump is sealed with static O-ring type seals. There are only two moving parts in the magnetically coupled external gear pump, driven magnet – driving gear assembly and driven gear, rotating on five bearings. This simplicity and precision design provides better than 1% repeatable accuracy.
The W-series is designed to operate at high rotational speed (RPM) while maintaining a low fluid velocity. The high rotational speed design reduces the magnet torque requirement reducing the shaft loading and pump size. The higher rotational speed requires less displacement reducing the gear sizes lowering the fluid velocity. The Tuthill W-series fluid velocity typically equals or is less than lower speed pump designs. This results in low NPSHR, typically less than 5 feet at two pole speed at 1 cps.
– External Gear Metering Pumps
– No Vapor Trapping Valveless Design
– Effective for metering Sodium Hypochlorite
– Metering Accuracy better than 1%
– Flow <1 ml/min to 650 GPH (2460 L/Hr)
– Differential pressures up to 250 PSI (17.2 bar)
Applications: Water and Wastewater Chemical metering such as Sodium Hypochlorite, Alums, Ferric Chloride, Hydrofluorosilicic Acid, Methanol, Polymers, Sodium Bisulfite, Sodium Hydroxide, Sulfuric Acid.