This is a specialized 3-inch helical gear pump from the industry-standard 3600 series with a displacement of 22 gallons per 100 revolutions, featuring flanged NPT ports with an outboard bearing and an internal relief valve. This heavy-duty pump operates efficiently in both directions and effectively handles heavy, viscous materials such as asphalt, molasses, roofing compounds, and printing inks, as well as fuel oils and gasoline. Built with cast iron gears, carbon bearings, and precision-ground stainless steel shafts for maximum durability in tank truck and industrial transfer applications. The 5374 specification indicates custom modifications including carbon bearings and stainless steel shafts for enhanced performance and corrosion resistance.