Specifically designed to offer maximum versatility for handling a wide variety of clean non-corrosive liquids, NP Series Sliding Vane Pumps, which are part of the Iron Line, are a general purpose positive displacement pump ideal for applications where high temperature, high pressure, high viscosity and/or shaft sealing requirements dictate a sleeve bearing pump are used. The key to the NP Series' versatility is the Blackmer® unique sliding vane rotor design that provides sustained, high level performance over a wide viscosity range. Slow operating speeds and non-pulsating flow minimizes shear and agitation of the fluid.
The unique head and bearing design of the NP Series pumps is conducive to a long bearing life - this design allows a small quantity of fluid to flow from the discharge side of the pump to the bearings. The small, continuous flow of fluid over the bearing surfaces provides a hydrodynamic film, minimizing temperature rise. These pumps are self-priming and dry run capable due to self-adjusting vanes. The NP pumps can run dry for short periods of time, ideal for priming and line stripping. Additionally, high volumetric efficiency and symmetrical bearing support mean the NP Series pumps require less horsepower than other PD pumps, which increases efficiency and cost savings to operate the pumps.