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Blackmer Magnes Sliding Vane Pump Blackmer Magnes Sliding Vane Pump Blackmer Magnes Sliding Vane Pump Blackmer Magnes Sliding Vane Pump Blackmer Magnes Sliding Vane Pump Blackmer Magnes Sliding Vane Pump Blackmer MAGNES Sliding Vane Pump MS3 Full Pump Assembly Cutaway

MAGNES Series Sliding Vane Magnetic Drive PumpsLeak-Free, Magnetic Drive Pump Featuring Positive Displacement Sliding Vane Technology

Blackmer® MAGNES Series Magnetic Drive Pumps bring world-first set of functionality, reliability, and flexibility to critical processes in numerous markets. As the newest addition to Magnetic Drive Pump Line of sliding vane pumps, MAGNES Series Magnetic Drive Pumps are positive displacement rotary vane pumps that use a magnetic drive without dynamic seals. This self-priming magnetic drive pump provides a leak-free pumping solution for difficult to seal liquids and any liquids that are too expensive, valuable, dangerous or hazardous to leak.

MAGNES Series Magnetic Drive Pumps solve legacy pain points with technically superior functionality that’s designed for chemical and severe duty applications. Key attributes include:

To learn more about how MAGNES solves these common issues, download our whitepaper.

Download Whitepaper

With 3- and 4-in models available in both ductile iron (MI3, MI4) and stainless-steel (MS3, MS4) construction, MAGNES Magnetic Drive Pumps boast performance up to 520 gpm at 200 psi (1,968 L/min at 13.8 bar). MAGNES Sliding Vane Pumps provide magnetic drive pump capabilities, with the innate advantages of sliding vane technology. As a true self-priming pump, it will not need to be pre-flooded prior to start-up and is well suited for continuous duty operation, since the pump has no cumulative dry run limit.

With this rotary vane magnetic drive pump design, the Blackmer MAGNES Series has combined the leak-free benefits of a magnetic drive pump, with the numerous advantages of sliding vane technology - such as self-priming, line-stripping, product recovery, dry-run capability, solids handling, thin/thick viscosity flexibility, easy maintenance and 70% to 90% pump efficiencies.

Features and Benefits

  • Magnetic drive pump design is inherently leak-free
  • Non-metallic, proprietary composite containment shell that provides the coupling strength of a thin wall metallic shell and the reliability of an eddy-current-free design
  • Low speed operation – pumps operate at 10%-20% speed range of comparable options, while achieving the same flow and pressure outputs as other pumping technologies
  • Solids handling ability – with large flow path design, and low internal flow velocity, particulates up to 1/8 inch (3 mm) can pass through without issue
  • Designed for entrained vapor handling, low to zero NPSH required
  • True self-priming pump, does not require filling before start-up
  • Features suction lift capabilities that meet or exceed 25 ft (7.6 m) wet vacuum and 16 ft (4.9 m) dry vacuum
  • Full curve performance across the entire system range, without sensitivity to a BEP curve
  • Entire pump assemblies available with motor, gearbox, and baseplate
  • Advantages of sliding vane technology:
    • Self-adjusts for wear to sustain flow capacity throughout pump life
    • Excellent at self-priming, eliminates expensive priming systems
    • Extended dry-run capability, eliminates nuisance current monitoring systems
    • 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, pumps are renewable and repairable
    • Solids handling, provided by large displacement and slow internal velocities
    • Thin to thick fluid viscosity flexibility, eliminates expensive heating systems


  • Loading & Unloading
  • Pressure Boosting Stations
  • Batch Blending
  • Forwarding
  • Processing
  • Railcar Transfer
  • Tank to Truck Transfer
  • Transloading

Performance and Specifications

  • MI3 MS3
  • MI4 MS4
  • Duravane®
  • EC Laminate
  • MI3 & MS3: <640 RPM
  • MI4 & MS4: <520 RPM
  • 0.2 cP – 500 cP
  • -30°F to 240°F (-34°C to 115°C)
  • 225 psi (15.5 bar)
  • Ductile Iron (standard): Side Inlet | Top Outlet - 90-deg ported
  • Ductile Iron (optional): Side Inlet | Side Outlet - 180-deg inline ported
  • Stainless (standard): Side Inlet | Top Outlet - 90-deg ported
  • 200 psi (13.8 bar)
  • 660 ft @ 0.7 SG (201 m @ 0.7 SG)
  • 460 ft @ 1.0 SG (140 m @ 1.0 SG)
  • 355 ft @ 1.3 SG (108 m @ 1.3 SG)
  • Hydrostatic Test
  • Performance Test
  • NPSH Test
  • Material (actual or typical)
  • Dimensional (pump only or unit)
  • MI3 & MS3: 75 - 260 gpm (284 - 984 L/min)
  • MI4 & MS4: 200 - 520 gpm (757 - 1,968 L/min)
  • MI3: 180-deg inline ported Ductile Iron | 90-deg ported Cast Iron
  • MI4: Ductile Iron
  • MS3 & MS4: Stainless Steel

MAGNES Nominal Flow Rate Range

MAGNES Nominal Flow Rate Range

Materials of Construction

 Parts MI3 MI4 MS3 MS4
Cylinder Inline: Ductile Iron, ASTM A536 90-deg: Cast Iron, ASTM A48 Ductile Iron, ASTM A536 17-4 PH Stainless Steel
Heads Ductile Iron, ASTM A536 17-4 PH Stainless Steel
Containment Shell PEEK Composite PEEK Composite
Magnets Neodymium Iron Boron Neodymium Iron Boron

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 Top Outlet: Outlet 90° offset from inlet
Side Outlet: Outlet 180° inline porting (MI3, MI4)
Butt Weld
NPT (available for MI3, MI4)
Unit: Pump, Motor, Gear Reducer, Baseplate, Couplings, Guards

Vane Options

Material Temperature Limits Viscosity Notes
Duravane  -30°F to 240°F (-34°C to 115°C) 0.2 cP – 500 cP Self-lubricating with broad chemical compatibility
EC Laminate -30°F to 240°F (-34°C to 115°C) 0.2 cP – 500 cP Self-lubricating & abrasion resistant

Elastomer Options

Material Temperature Limits
FKM -15°F to 240°F (-26°C to 115°C)
PTFE -30°F to 240°F (-34°C to 115°C)
Buna-N Nitrile -30°F to 240°F (-34°C to 115°C)

Maintenance Kits

Model(s) Description Part Number
MI3 Kit - Maintenance, Wear Parts 899097
MI3 Kit - Rebuild, Wear Parts & Rotor/Shaft 899197
MS3 Kit - Maintenance, Wear Parts 899098
MS3 Kit - Rebuild, Wear Parts & Rotor/Shaft 899198
MI4 Kit - Maintenance, Wear Parts 899083
MI4 Kit - Rebuild, Wear Parts & Rotor/Shaft 899183
MS4 Kit - Maintenance, Wear Parts 899084
MS4 Kit - Rebuild, Wear Parts & Rotor/Shaft 899184