Tuthill offers these pumps for applications requiring either higher flow or heavy-duty service designs. Customized designs are available that include close-coupled mounting, hydraulic motor drives, belt drives, and seal-less magnetic couplings. High suction pressure, high fluid temperature, and cold starting conditions designs are available for specific application challenges. Pump construction materials include cast iron, cast steel, and stainless steel. Typical applications include lube oil pump-motor assemblies for compressor and rotating equipment skids, pump units for hot oil systems and hot asphalt packages. These Global Gear pumps have a back pull-out design that provides ease of maintenance. They also have flow rates up to 550 usgpm (124.9m^3 / hr), pressures up to 200 psi (13.8 bar) and viscosities up to 1,000,000 ssu (220,000 cst).
To further differentiate, Tuthill also offers the HD series of product for the most demanding applications. The HD series is capable of handling multiple pumping challenges that may include presence of solids, and large viscosity and temperature ranges in one application. HD pumps can offer an attractive alternative to progressing cavity pumps and air-operated diaphragm pumps. HD pumps will tolerate intermittent run dry, are relatively compact, will pump liquids with viscosities that range from thin to very thick, will handle temperatures up 525 degrees F and are energy efficient. Standard pump construction is in ductile iron or 316 stainless steel. This pump’s main application is seen with chemical processing, petroleum products, asphalt, foods, pulp and paper, bulk transfer, and inks, paints and pigments.