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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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Sliding Vane Pumps

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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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General Industrial

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ML4 Pump 600

MLX Sliding Vane Pumps Ductile-Iron Pumps Designed for Handling all Types of Liquids

Model MLX Sliding Vane Pumps, part of the Heavy Duty Line, are designed for handling all types of liquids from light non-lubricating to viscous abrasive slurries and waste oils. The MLX pump features internal mechanical seals with external ball bearings. The hub assembly in this model features external grease-lubricated spherical roller bearings and can be fitted with a wide selection of Blackmer® mechanical seals. Options include hardened or wear resistant internal components.

Features and Benefits

  • Available with internal mechanical seals with external ball bearings
  • 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
  • Blackmer mechanical seal and ball bearing construction provide maximum reliability
  • Symmetrical bearing support assures even loading and wear for long life
  • External ball bearings are isolated from pumpage by mechanical seals to maximize bearing life and minimize contamination risk
  • 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
  • Asphalts

Performance and Specifications

AVAILABLE MODELS
  • MLX4
NOMINAL FLOW RATE
  • 35 - 590 gpm (132 - 2,233 L/min)
DIFFERENTIAL PRESSURE
  • 200 psi (13.8 bar)
MAXIMUM WORKING PRESSURE (MAWP)
  • 250 psi (17.2 bar)
VISCOSITY
  • 0.2 - 21,000 cP
TEMPERATURE
  • -25°F to 240°F (-32°C to 115°C)
MIN/MAX SPEED (rpm)
  • 68 - 600
PRIMARY MATERIALS OF CONSTRUCTION
  • Ductile Iron
CONNECTION ORIENTATION
  • Side Inlet | Side Outlet
VANE MATERIALS
  • Laminate
  • Bronze
  • Hardened Steel
AVAILABLE CERTIFICATES
  • Hydrostatic Test
  • Performance Test
  • NPSH Test
  • Material (actual or typical)
  • Dimensional (pump only or unit)

Dimensions

Pump Model L W H Approx. Wt.
MLX in 22 29-1/4 27-3/8 393 lb
mm 558.8 739.8 695.3 179 kg

Materials of Construction

Parts Models Materials
Casing, Heads, Hubs MLX Series Ductile Iron: ASTM 536
Liner MLX4, MRLX4
MLXW4, MRLXW4
Ductile Iron: ASTM 536
Hardened Ductile Iron: ASTM 536
Discs MLX4, MRLX4
MLXW4, MRLXW4
Cast Iron: ASTM A48
Hardened 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 4" 150 lb. Flat Face ANSI Compatible, Ductile Iron
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 300°F (-32°C to 149°C) 0.2 - 4,250 cP
EC Laminate -25°F to 300°F (-32°C to 149°C) 0.2 - 8,500 cP
EC Bronze -25°F to 300°F (-32°C to 149°C) 105 - 21,000 cP
EC Hardened Ductile Iron -25°F to 300°F (-32°C to 149°C) 105 - 21,000 cP

Elastomer Options

Temperature Limits
FKM -15°F to 300°F (-26°C to 149°C)
PTFE - SS Spring -0°F to 300°F (-18°C to 149°C)

Downloads

Installation Operation Manuals (IOMs)

MLX4B, MLXW4B, MRLX4B, MRLXW4B, MLN4B, MRLN4B
MLX4B, MLXW4B, MRLX4B, MRLXW4B, MLN4B, MRLN4B
MLX4B, MLXW4B, MRLX4B, MRLXW4B, MLN4B, MRLN4B

Parts Lists

Materials of Construction

MLX4B, MLXW4B, MRLX4B, MRLXW4B

Dimensions

MLX4B, MRLX4B, MRLXW4B, MLN4B, MRLN4B

Performance Curves

MLX4, MLXW4, MLN4, MRLX4, MRLXW4, MRLN4