Model MLN Sliding Vane Pumps, part of the Heavy Duty Line of sliding vane pumps, are ideal for handling thin to highly viscous fluids such as oils, asphalts, molasses and adhesives. These positive displacement rotary pumps are constructed with ductile iron, and are ideal for handling everything from thin non-lubricating solvents, to highly viscous liquids or abrasive slurries. The MLN features internal self-lubricating carbon sleeve bearings and PTFE-impregnated shaft packing. Options include Blackmer® or commercial single or double mechanical seals.

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 MLN 4-inch Sliding Vane Pump. No alignment required with these pre-configured fully Integrated Unit Assemblies as they are ready for immediate drop-in installation.

MLN Sliding Vane Pumps
MLN Sliding Vane Pumps
MLN Sliding Vane Pumps
MLN Sliding Vane Pumps

Features and Benefits

  • Available with internal sleeve bearings with external stuffing box 
  • Modular bearing hub assemblies allow these pumps to be easily reconfigured in the field
  • Optional wear hardened parts available for abrasive applications
  • Jacketed pump head option for high temperature operation
  • Ductile-iron construction with bolt on, internal relief valve
  • Symmetrical bearing support assures even loading and wear for long life
  • Optional commercial mechanical seals
  • External shaft stuffing box accommodates most standard aftermarket mechanical seal configurations
  • 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

Applications

  • Chemicals
  • Petroleum
  • Paint and coatings
  • Pulp and paper
  • Food processing
  • Oils
  • Asphalts
  • Molasses
  • Adhesives

Performance and Specifications

AVAILABLE MODELS

  • MLN4

VISCOSITY

  • 0.2 - 108,000 cP

CONNECTION ORIENTATION

  • Side Inlet | Side Outlet

TEMPERATURE

  • -25°F to 400°F (-32°C to 204°C)

NOMINAL FLOW RATE RANGE

  • 35 - 590 gpm (132 - 2,233 L/min)

DIFFERENTIAL PRESSURE

  • 200 psi (13.8 bar)

MAXIMUM WORKING PRESSURE (MAWP)

  • 250 psi (17.2 bar)

AVAILABLE CERTIFICATES

  • Hydrostatic Test
  • Performance Test
  • NPSH Test
  • Material (actual or typical)
  • Dimensional (pump only or unit)

PRIMARY MATERIALS OF CONSTRUCTION

  • Ductile Iron

VANE MATERIALS

  • Laminate
  • Bronze
  • Hardened Steel

MIN/MAX SPEED (rpm)

  • 68 - 600

Dimensions

Pump Model L W H Approx. Wt.
MLN in 22-1/4 29-3/8 27-3/8 385 lb
mm 565.2 746.2 695.3 173 kg

Materials of Construction

Parts Materials
Casing, Heads, Hubs Ductile Iron: ASTM 536
Liner Ductile Iron: ASTM 536
Discs Cast Iron: ASTM A48

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 Side Outlet: Outlet 180° inline porting
CONNECTION OPTIONS NPT (threaded)
MOUNTING OPTIONS Pump Only
Unit: Pump, Motor, Baseplate, Couplings, Guards
SEALING OPTIONS Blackmer single mechanical seal

Vane Options

Temperature Limits Viscosity
STD Laminate -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 - 8,500 cP
EC Bronze -25°F to 400°F (-32°C to 204°C) 105 - 108,000 cP
EC Hardened Ductile Iron -25°F to 400°F (-32°C to 204°C) 105 - 108,000 cP

Elastomer Options

Temperature Limits
FKM -15°F to 400°F (-26°C to 204°C)
PTFE - SS Spring -0°F to 400°F (-18°C to 204°C)

Maintenance Kits

Model(s) Description Part Number
MLN4B Kit - Rebuild 899118
MLN4B Kit - Maintenance 899218