NP Series Sliding Vane Pumps

Blackmer® – part of PSG®, a Dover company logo
The NP Series is part of Blackmer’s iron line of sliding vane pumps. They are designed for maximum versatility in handling clean, non-corrosive liquids in high-temperature, high-pressure, high-viscosity applications. The NP pumps’ unique sliding vane rotor design provides sustained, high-level performance over a wide viscosity range. Their slow operating speeds and non-pulsating flow minimises shear and agitation of the fluid. Equipped with self-lubricating internal sleeve bearings, Blackmer NP pumps also offer maintenance-free performance.

KNOW MORE ABOUT BLACKMER NP SERIES SLIDING VANE PUMPS

  • Albany is a force to reckon with in the design and manufacture of high-quality positive displacement pumps, gear pumps, lobe pumps, and screw pumps.
  • Albany is a force to reckon with in the design and manufacture of high-quality positive displacement pumps, gear pumps, lobe pumps, and screw pumps.
  • Albany is a force to reckon with in the design and manufacture of high-quality positive displacement pumps, gear pumps, lobe pumps, and screw pumps.

Design Advantages

  • Ductile-iron construction with metallised carbon sleeve bearings and non-metallic vanes for longer life
  • Shaft stuffing box accommodates most standard aftermarket mechanical seal configurations
  • Pump design and operation minimises shear and agitation
  • Adjustable relief valve protects pump against excessive pressures
  • Excellent self-priming and dry-run capabilities
  • Sustained performance and trouble-free operation
  • High suction lift and line-stripping capabilities
  • Easy to maintain – low maintenance and life cycle costs

Available Options

We customise pumps according to your application requirements. Contact us to know more about your options.

  • Optional commercial mechanical seal with stainless steel, carbon, and PTFE construction
  • Jacketed pump head option for high-temperature operation
  • Vane material options
  • Sealing options
  • Elastomer options
  • Material options
  • Connection options
  • Porting options
  • Mounting/baseplates
  • Maintenance kits/spare parts

Key Specifications

  • Flow rates up to 1,985 L/min
  • Max differential pressures: 8.6 – 13.8 bar
  • Working pressures up to 15.5 bar
  • Max viscosities: 4,250 to 22, 000 Cp

Applications

  • Refiled fuels
  • Greases
  • Solvents
  • Chocolate
  • Syrups
  • Molasses
  • Edible oils
  • Black liquor
  • Sodium silicate
  • Tallow
  • Wax
  • Glues
  • Adhesives
  • Creosote
  • Asphalt
  • Aqueous Film Forming Foam (AFFF)

BLACKMER NP SLIDING VANE TECHNICAL DATA

PUMP SIZE FLOW RATE RANGE WORKING PRESSURE VISCOSITY RANGE
(CLOSED ROTOR)		 VISCOSITY RANGE
(OPEN ROTOR)		 DIFFERENTIAL PRESSURE
(CLOSED ROTOR)		 DIFFERENTIAL PRESSURE
(OPEN ROTOR)
1.5” 8-178 L/min 15.5 bar 0.2-4,250 cP 0.2-22,000 cP 8.6 bar 13.8 bar
2” 38-291 L/min 15.5 bar 0.2-4,250 cP 0.2-22,000 cP 8.6 bar 13.8 bar
2.5” 76-515 L/min 15.5 bar 0.2-4,250 cP 0.2-22,000 cP 8.6 bar 13.8 bar
3” 227-1045 L/min 15.5 bar 0.2-4,250 cP 0.2-22,000 cP 8.6 bar 13.8 bar
4” 833-1985 L/min 15.5 bar 0.2-4,250 cP 0.2-22,000 cP 8.6 bar 13.8 bar

PRINCIPLE OF OPERATION

Blackmer sliding vane pumps use a rotor with sliding vanes to draw liquid into the pump. This rotor is located close to the wall of the cam so that a crescent-shaped cavity is formed on the opposite wall. Each rotor slot contains a sliding vane. As the rotor rotates, centrifugal force, hydraulic pressure, and push rods work together to extend each vane to the casing wall. This creates an expanding cavity on the inlet side – creating a vacuum that pulls liquid into the pump. The liquid is trapped between the vanes and the casing wall. The rotor rotation moves the liquid cavities around to the outlet side of the pump. The vanes are forced back into their slots at the outlet side, decreasing the cavity size and forcing the liquid through the outlet port.

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