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Blackmer SGL High Speed Pump

SGL High-Speed Sliding Vane PumpsHigh-Speed, Ductile-Iron Pump for Liquefied Gas Transfer Applications

Blackmer® SGL high-speed pumps, which are part of the Cavitation Line of sliding vane pumps designed for high vapor pressure liquids, are designed for the liquid transfer or recirculation of refrigerants and other liquefied gasses. Constructed of shock-resistant ductile iron and available with a wide variety of seal materials, SGL pumps are ideally suited for almost any liquefied gas application. In addition, these pumps feature cavitation suppression liners to reduce noise, vibration and wear.

The sliding vane, positive displacement design provides excellent priming capability and high performance over a wide range of temperatures and differential pressures. The vanes self-adjust as they wear, maintaining the efficiency of a new pump. The vanes, liner and end discs are all easily replaced, bringing the pump back to like new condition. SGL pumps are available in 1.25- and 1.5-inch sizes.

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 SGL 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
  • Mechanical seal and elastomer options assure compatibility with refrigerants and other specialty gases
  • Available in 1.25- and 1.5-in sizes
  • 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
  • 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


  • Butadiene
  • Butene
  • Dimethyl ether
  • Ethyl chloride
  • Refrigerants - MF/TA/TMS/TF
  • Most 400 & 500 series blends
  • Sulfur dioxide

Performance and Specifications

  • SGLR1.25, SGL1.25, SGL1.5
  • SGRL1.25: 5-16 gpm (19-61 L/min)
  • SGL1.25: 5-21 gpm (19-79 L/min)
  • SGL1.5: 7-32 gpm (27-121 L/min)
  • 150 psi (10.3 bar)
  • 525 psi (36.2 bar)
  • 0.2 - 4,250 cP
  • -30°F to 240°F (-34°C to 115°C)
  • 850 - 1,750 rpm
  • Ductile Iron
  • Side Inlet | Side Outlet
  • Duravane
  • EC Laminate
  • Hydrostatic Test
  • Performance Test
  • NPSH Test
  • Material (actual or typical)
  • Dimensional (pump only or unit)


Pump Model L W H Approx. Wt.
SGL1.25, SGL1.5, SGRL 1.25 in 9-3/8 9-1/8 9-1/8 29 lb
mm 238.1 231.8 231.8 13.2 kg

Materials of Construction

Part Material
Casing, Heads, Relief Valve Cover Ductile Iron: ASTM 536

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
Sealing Options Blackmer single mechanical seal

Vane Options

Material Temperature Limits Viscosity
Duravane  -25°F to 240°F (-32°C to 115°C) 0.2 - 4,250 cP
STD Laminate   -30°F to 240°F (-34°C to 115°C) 0.2 - 4,250 cP

Elastomer Options

Material Temperature Limits
HNBR -30°F to 240°F (-34°C to 115°C)
FKM -15°F to 240°F (-26°C to 115°C)
PTFE - SS Spring 0°F to 240°F (-18°C to 115°C)
Neoprene -30°F to 240°F (-34°C to 115°C)

Maintenance Kits

Model(s) Description Part Number
SGRL1.25 Kit - Rebuild 898832
SGL1.25 Kit - Rebuild 898833
SGRL1.25, SGL1.25, SGL1.5 Kit - Maintenance 898733
SGL1.5 Kit - Rebuild 898834