Blackmer’s NP Series Sliding Vane Pumps are designed to provide efficient transfer when handling asphalt or bitumen. The pumps are a good fit for the many different transfers of raw products from storage into the refinery and from process to process within asphalt operations. The pumps are designed for the handling of a variety of liquids at varying temperatures, pressures and viscosities, offering maximum versatility while sustaining a high-level of performance and trouble-free operation. The pumps are available in five sizes, with port sizes from 1.5 inches to 4 inches. They feature flowrates from 5 GPM to 500 GPM (19 LPM 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 ssu 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 100,000 ssu (22,000 cP) and differential pressures up to 200 PSI (13.8 bar). – blackmer.com