NP Series pumps are suitable for all of the different transfers of raw products from storage into the refinery, and from process to process within asphalt operations. Blackmer’s NP Series pumps have been designed for the handling of a wide variety of liquids at varying temperatures, pressures and viscosities. They are available in five sizes, with port sizes from 1.5 to 4 in. They feature flow rates from 5 to 500 gpm (19 to 1,893 lpm) at operating temperatures up to 500°F (260°C), with an optional jacketed pump head for high-temperature operating atmospheres. They can handle viscosities ranging from 30 to 20,000 ssu (4,250 cP) at differential pressures up to 150 psi (10.3 bar) with standard construction, while an adjustable relief valve protects against excessive operating pressures. With optional materials, maximum viscosities can go to 100,000ssu (22,000 cP) and differential pressures up to 200 PSI (13.8 bar).