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Blackmer X2-120904 Sliding Vane Pump

X 2-4 Sliding Vane Pumps Rotary Pumps For Trouble-Free Operation and Low Maintenance Cost

X model positive displacement rotary pumps, part of the Iron Line of sliding vane pumps, utilize a unique sliding vane design to offer the best combined characteristics of sustained high level performance, energy efficiency, trouble-free operation and low maintenance cost. Also, the high suction lift capability of these pumps makes them especially suitable for pumping from underground tanks, bulk plant service and aircraft refueling.

Blackmer® X model pumps are available in 2-, 2.5-, 3- and 4-in flanged port sizes with capacities from 10 to 520 U.S. gpm (38-1,855 L/min). Cast-iron construction is standard on all models except the X4 model which is ductile iron construction. All models have external ball bearings isolated from the pumpage by mechanical seals. X model pumps feature a 90° porting orientation, while XH model pumps have a 180° porting orientation.

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 XLW Sliding Vane Pump (2, 2.5, 3 & 4-inch size). No alignment required with these pre-configured fully Integrated Unit Assemblies as they are ready for immediate drop-in installation.

Features and Benefits

  • Durable pumps for fast and quiet operation
  • Latest 6-vane design contributes to reduced noise levels in the pumps
  • 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


Blending, loading, unloading & transfer of:

  • Fuel oil
  • Jet fuel
  • Gasoline
  • Ethanol & other alcohols
  • Lube oil
  • Solvents
  • Ester
  • Ketone
  • Naphtha
  • Ether
  • Amine
  • Aromatic
  • Terpene
  • Glycol
  • Additives

Performance and Specifications

Available Models
  • X2
  • XH2
  • X2.5
  • XH2.5
  • X3
  • XH3
  • X4
  • XH4
Nominal Flow Rate
  • X(H)2: 10 - 82 gpm (38 - 311 L/min)
  • X(H)2.5: 20 - 148 gpm (76 - 562 L/min)
  • X(H)3: 60 - 270 gpm (227 - 1,022 L/min)
  • X(H)4: 220 - 528 gpm (833 - 2,000 L/min)
Min/Max Speed (rpm)
  • X(H)2: 70 - 780
  • X(H)2.5: 70 - 780
  • X(H)3: 70 - 640
  • X(H)4: 70 - 520
Differential Pressure
  • 125 psi (8.6 bar)
Maximum Working Pressure (MAWP)
  • 175 psi (12.1 bar)
  • 0.2 - 4,250 cP
  • -25°F to 300°F (-32°C to 148°C)
Primary Materials of Construction
  • X: Cast Iron
  • XH: Ductile Iron
Connection Orientation
  • X: Side Inlet | Top Outlet
  • XH: Side Inlet | Side Outlet
Vane Materials
  • Duravane
  • EC Laminate
  • Bronze
  • Iron
Catalog Options
  • Connections: NPT, Weld, ANSI Flange
  • Elastomers: BUNA, FKM, PTFE
  • Seal: Blackmer single mechanical
Available Certificates
  • Hydrostatic Test
  • Performance Test
  • NPSH Test
  • Material (actual or typical)
  • Dimension (pump only or unit)

X Series Nominal Flow Rate Range

X Series Nominal Flow Rate Range


Pump Model L W H Approx. Wt.
X2 in 15-1/4 9-3/4 8-2/3 70 lb
mm 387.4 247.7 211.6 32 kg
X2.5 in 14-3/4 10-11/16 9-5/8 93 lb
mm 374.7 270.8 244.7 42 kg
X3 in 16 13-7/16 12-1/4 152 lb
mm 406.4 341.4 311.2 69 kg
X4 in 19-1/8 16-1/2 15-1/2 275 lb
mm 486.4 419.1 393.7 125 kg
XH2 in 13-1/4 10-1/16 8-7/8 65 lb
mm 336.6 255 224.8 29 kg
XH2.5 in 14-3/4 11-1/8 9-4/5 85 lb
mm 374.7  283.2 248.9 39 kg
XH3 in 16 14-1/3 12-1/16 137 lb
mm 406.4 363.9 306.3 62 kg
XH4 in 19-1/16 17-15/16 15-9/16 292 lb
mm 484.1 455.7 394.9 132 kg

Materials of Construction

Parts Models Materials
Cylinder, Relief Cover Valve X2, 2.5, 3
X4 and all XH
Cast Iron: ASTM A48
Ductile Iron: ASTM 536
Head X(H)2, 2.5, 3
X4, XH4
Cast Iron: ASTM A48
Ductile Iron: ASTM 536
Bearing Covers X(H)2, 2.5, 3
Cast Iron: ASTM A48
Locknut and Lockwasher X2.5, XH2.5, X3, XH3 Only Steel
Rotor & Shaft All Models Ductile Iron: ASTM 536
Shaft All Models  High Strength Steel

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 X Series: Top Outlet: Outlet 90º offset from inlet
XH Series: Side Outlet: Outlet 180° offset from inlet
Welded, ANSI Flange (CI 150 RF)
Unit: Pump, Gearbox, Motor, Baseplate, Couplings, Guards
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
EC Laminate -25°F to 300°F (-32°C to 148°C) 0.2 - 8,500 cP
Bronze -25°F to 300°F (-32°C to 148°C) 105 - 108,000 cP
Cast Iron -25°F to 300°F (-32°C to 148°C) 105 - 108,000 cP

Elastomer Options

Material Temperature Limits
BUNA -25°F to 240°F (-32°C to 117°C)
FKM -15°F to 300°F (-26°C to 150°C)
PTFE -25°F to 300°F (-32°C to 150°C)

Maintenance Kits

Model(s) Description Part Number
X2, XH2 Kit - Maintenance 898956
X2.5, XH2.5 Kit - Maintenance 898957
X3, XH3 Kit - Maintenance 898958
X4, XH4 Kit - Maintenance 898959

Now hear from our customers about what they had to say about Blackmer X 2-4 Sliding Vane Pumps:


Installation Operation Manuals (IOMs)

GX2B, GX2.5B, GX3E, GX4B, X2B, X2.5B, X3E, X4B, XH2B, XH2.5B, XH3E, XH4B
GX2B, GX2,5B, GX3E, GX4B, X2B, X2,5B, X3E, X4B, XH2B, XH2.5B, XH3E, XH4B

Materials of Construction

X2B, X2.5B, X3E, X4B, XH2B, XH2.5B, XH3E, XH4B


X2, X2.5, X3, X4, XH2, XH2.5, XH3, XH4