Description
GNX Series Sliding Vane Pumps
Part of the Iron Line of sliding vane pumps, these Blackmer® pumps are the market’s only alignment-free, reduced-speed positive displacement pumps. They are suited for both portable and stationary applications. GNX Series pumps include the proven features of Blackmer legacy GX Series pumps but take them to the next level with the incorporation of a commercial-grade, single-stage gearbox. This innovative new gearbox fits between the motor and pump and is held in place by a permanent dowelled connection that creates a structural link between the high-speed and low-speed sides of the system. This results in a pump that will not need to be realigned either at initial installation or following a maintenance procedure, resulting in improved peace of mind for the operator. The pre-grouted GNX composite baseplate adds additional value to the pump, gearbox and motor setup by providing unmatched surface flatness, significant vibration damping, and reduced installation costs.
Performance and Specifications
AVAILABLE MODELS
- GNX2
- GNX2.5
- GNX3
- GNX4
- GNXH2
- GNXH2.5
- GNXH3
- GNXH4
NOMINAL FLOW RATE RANGE
- GNX2: 7 – 86 gpm (26 – 325 L/min)
- GNX2.5: 12 – 155 gpm (45 – 587 L/min)
- GNX3: 100 – 275 gpm (379 – 1,041 L/min)
- GNX4: 250 – 500 gpm (946 – 1,893 L/min)
AVAILABLE CERTIFICATES
- Hydrostatic Test
- Performance Test
- NPSH Test
- Material (actual or typical)
- Dimensional (pump only or unit)
DIFFERENTIAL PRESSURE
- 2″ & 2.5″: 125 psi (8.6 bar)
- 3″ & 4″: 100 psi (6.9 bar)
MIN/MAX SPEED (rpm)
- 2″ & 2.5″: 323 – 814 rpm
- 3″: 332 – 700 rpm
- 4″: 257 – 563 rpm
VANE MATERIALS
- Duravane
- EC Laminate
- EC Cast Iron
VISCOSITY
- 0.2 – 4,250 cP
MAXIMUM WORKING PRESSURE (MAWP)
- 175 psi (12.1 bar)
TEMPERATURE
- -25°F to 240°F (-32°C to 115°C)
PRIMARY MATERIALS OF CONSTRUCTION
- Ductile Iron, Cast Iron
CONNECTION ORIENTATION
- Side Inlet | Top Outlet (GNX)
- Side Inlet | Side Outlet (GNXH)









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