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Blackmer® is the leading global provider of innovative, high-quality sliding vane, centrifugal, screw and regenerative turbine pump, and reciprocating gas compressor technologies for the safe transfer of liquids and gases.

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Providing Innovative Product-Transfer Solutions for a Variety of Markets and Applications

Blackmer provides innovative product transfer solutions for many markets and applications, including in the chemical process, energy, transport, military & marine; general industrial, and oil & gas industries.

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Blackmer SNP3 Sliding Vane Pump_1 Blackmer SNP 316 2 600 Sliding Vane Pump Blackmer SNP3 Sliding Vane Pump_3 Blackmer SNP3 Sliding Vane Pump_2

SNP 2-3 Inch Sliding Vane Pumps Stainless-Steel Pumps For Caustic or Corrosive Liquids

SNP Series pumps, which are part of the Stainless Line of sliding vane pumps, are capable of meeting these demands because they offer the flexibility needed to handle caustic and corrosive liquids at varying temperatures, pressures and viscosities. This allows them to be used in various loading/unloading and transfer applications, while the stainless-steel construction of the SNP model makes its ideal for handling a variety of corrosive or caustic fluids, which is a crucial consideration in the manufacture and shipping of biodiesel.

With flow rates of 75 to 275 U.S. gpm (178 to 1,040 L/min) and standard operating temperatures of -25°F to 350°F (-31°C to 177°C), the SNP 2- and 3-in pumps offer the best combined characteristics of sustained high-level performance, energy efficiency, trouble-free operation and low maintenance cost.

Blackmer fully Integrated Unit Assemblies are the pre-engineered and pre-designed drop-in pumping solution. These unit assemblies, include motor, gearbox, baseplate, coupling safety covers, and a SNP Stainless Steel Sliding Vane Pump (2, 2.5 & 3-inch size). No alignment required with these pre-configured fully Integrated Unit Assemblies as they are ready for immediate drop-in installation.

Features and Benefits

  • 316 stainless steel construction with metallized carbon sleeve bearings and non-metallic vanes for longer life with corrosive products
  • Use of nonmetallic sliding vanes and reversible carbon discs within the pump reduces friction and eliminates galling
  • Optional commercial mechanical seal with stainless steel, carbon, and PTFE construction
  • Optional Triple-lip cartridge seal available 
  • Shaft stuffing box accommodates most standard aftermarket mechanical seal configurations
  • Jacketed pump head option for high temperature operation
  • Pump design and operation minimizes shear and agitation
  • Symmetrical bearing support assures even loading and wear for long life
  • Adjustable relief valve protects pump against excessive pressures
  • Advantages of sliding vane technology:
    • Unique sliding-vane pump design self-adjusts for wear to maintain flow rates
    • Excellent self-priming and dry run capabilities
    • Sliding vane design provides sustained performance and trouble-free operation
    • Easy maintenance: vanes can be easily replaced without removing the pump from the piping system
    • High suction lift and line stripping capabilities
    • Low maintenance and low life cycle costs


  • Corrosive or caustic fluids:
    • Sugars
    • Syrups
    • Beer
    • Beet juice
    • Cider
    • Flavor extracts

Performance and Specifications

  • SNP2
  • SNP2.5
  • SNP3
  • SNP2: 12 - 75 gpm (46 - 284 L/min)
  • SNP2.5: 46 - 134 gpm (174 - 507 L/min)
  • SNP3: 90 - 275 gpm (341 - 1,040 L/min)
  • Duravane
  • EC Laminate
  • 0.2 - 6,300 cP
  • -25°F to 350°F (-31°C to 177°C)
  • 150 psi (10.3 bar)
  • 125 / 640
  • 200 psi (13.8 bar)
  • Stainless Steel
  • SNP2/SNP2.5: Side Inlet | Side Outlet
  • SNP3: Side Inlet | Top Outlet
  • Hydrostatic Test
  • Performance Test
  • NPSH Test
  • Material (actual or typical)
  • Dimensional (pump only or unit)

SNP Nominal Flow Rate Range

SNP Nominal Flow Rate Range


Pump Model L W H Approx. Wt.
SNP2 in 16-1/2 11 15 88 lb
mm 419.1 279.4 381 40 kg
SNP2.5 in 18-4/5 11-1/2 16-1/2 120 lb
mm 477.8 292 419.1 54.4 kg
SNP3 in 21 13-3/16 12-1/2 130 lb
mm 533 335 317.5 59 kg

Materials of Construction

Parts Materials
Cylinder, Heads, Optional Relief Valve  316 Stainless Steel: ASTM A743, CF-8M

Pump Options

Options Details
ORIENTATION OPTIONS Right Hand: INLET is to the right, when looking from driven side
Left Hand: INLET is to the left, when looking from driven side
PORTING OPTIONS SNP2/2.5: Side Outlet: Outlet 180° inline porting
SNP3: Top Outlet: Outlet 90° offset from inlet
Unit: Pump, Motor, Baseplate, Couplings, Guards
SEALING OPTIONS Blackmer single mechanical seal

Vane Options

Material Temperature Limits Viscosity
Duravane -25°F to 350°F (-32°C to 177°C) 0.2 - 4,250 cP
EC Laminate -25°F to 350°F (-32°C to 177°C) 0.2 - 6,300 cP

Elastomer Options

Material Temperature Limits
PTFE - SS Spring -25°F to 350°F (-31°C to 177°C)

Maintenance Kits

Model(s) Description Part Number
SNP2 Kit - Maintenance 898946
SNP2 Kit - Maintenance (jacketed) 898987
SNP2 Kit - Rebuild 899046
SNP2 Kit - Rebuild (jacketed) 899087
SNP2.5 Kit - Maintenance 898947
SNP2.5 Kit - Maintenance (jacketed) 898988
SNP2.5 Kit - Rebuild 899047
SNP2.5 Kit - Rebuild (jacketed) 899088
SNP3 Kit - Maintenance 898948
SNP3 Kit - Rebuild 899048