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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 CRL High Speed Pumps

CRL High-Speed Sliding Vane Pumps High-Speed, Ductile-Iron, Recirculation Pumps for Liquefied CO2 Applications

Part of the Cavitation Line, CRL high-speed sliding vane pumps are durable motor-speed pumps offer capacities from 5 to 22 U.S. gpm (19-83 L/min), and are ideal for loop systems and low volume transfer applications. CRL models are designed for foot-mounting to a common baseplate.

Available with 1.25- or 1.5-in NPT tapped ports, all models are equipped with an internal relief valve, and a replaceable casing liner and end discs for easy rebuilding of the pumping chamber if ever necessary. The CRLR 1.25-in model features a special liner which offers lower flow rates than the CRL 1.25-in pump.

Standard construction materials for these pumps include silicon carbide mechanical seals and laminate vanes. Maximum differential pressure for the CRLR 1.25 is 70 psi (4.83 bar), and 100 psi (6.89 bar) for the CRL 1.25- and CRL 1.5-in models.

Assembled pump units are available from the factory, with or without motors. For dimensions of assembled pump units, refer to catalog dimension sheets.

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 CRL 1.5-inch Sliding Vane Pump. No alignment required with these pre-configured fully Integrated Unit Assemblies as they are ready for immediate drop-in installation.

Features and Benefits

  • Cavitation suppression liner design for reducing the noise, vibration, and wear normally caused by entrained vapors
  • Replaceable casing, liners and end discs allow easy rebuilding of the pumping chamber to like-new condition
  • Ductile-iron construction with internal relief valve
  • Blackmer mechanical seal and ball bearing construction provide maximum reliability
  • Symmetrical bearing support assures even loading and wear for long life
  • Adjustable relief valve protects pump against excessive pressures
  • External ball bearings are isolated from pumpage by mechanical seals to maximize bearing life and minimize contamination risk
  • 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


  • CO2
    • Recirculation
    • Processing
    • Bulk transfer
    • Truck & transport
    • Railcar unloading
    • Vapor recovery

Performance and Specifications



  • CRLR1.25: 2.5 - 11 gpm (9 - 42 L/min) 
  • CRL1.25: 2 - 15 gpm (8 - 57 L/min)
  • CRL1.5: 5 - 24 gpm (19 - 91 L/min)
  • CRLR1.25: 70 psi (4.83 bar)
  • CRL1.25/1.5: 100 psi (6.9 bar)

525 psi (36.2 bar)


0.2 - 4,250 cP


-30°F to 240°F (-34°C to 115°C)


750 - 1,150


Ductile Iron


Side Inlet | Side Outlet



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


Pump Model L W H Approx. Wt.
CRLR1.25, CRL1.25, CRL1.5 in 9-3/8 9-1/8 9-1/8 29 lb
mm 238.1 231.8 231.8 13 kg

Materials of Construction

 Part  Material
Cylinder, Head, Relief Valve Cover Ductile Iron: ASTM 536
Liner, 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

Material Temperature Limits Viscosity
STD Laminate -30°F to 240°F (-34°C to 115°C) 0.2 - 4,250 cP

Elastomer Options

Material Temperature Limits
Buna-N -25°F to 240°F (-34°C to 115°C)

Maintenance Kits

Model(s) Description Part Number
CRLR1.25 Kit - Maintenance 898902
CRLR1.25 Kit - Rebuild 899002
CRL1.25 Kit - Maintenance 898903
CRL1.25 Kit - Rebuild 899003
CRL1.5 Kit - Maintenance 898904
CRL1.5 Kit - Rebuild 899004