Grinder pumps are specialized sewage pumps that use cutters to macerate difficult waste solids into a fine slurry so that wastewater can easily be transported out of a building's sewage system. Grinder pumps are perfect for applications in which excess solids - think hand wipes or feminine products - are present in the system in high volume and regular sewage pumps just won't cut it. For instance, the service division of Pump Products recently installed new grinder pumps on Liberty Island to replace sewage ejector pumps.
In this buyer's guide, we'll be walking you through three series of grinder pumps from Liberty Pumps, one of our esteemed manufacturers. The ProVore PRG-Series, the Omnivore LSG200-Series and the Omnivore LSGX-Series are highlighted.
Pump Products experts want to help you make the best grinder pump purchase for your application and budget.
(When doing your research, keep in mind the taxonomy of sewage pumps: all grinder pumps are sewage pumps, but not all sewage pumps are grinder pumps)
Comparison Chart of the Liberty ProVore, LSG200 and LSGX Grinder Pumps
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ProVore PRG-Series Grinder Pumps
The ProVore PRG-series is expressly designed for use in residential or home wastewater systems. ProVore pumps are equipped with Liberty’s patented V-Slice stainless steel cutter that is capable of turning solids such as plastic bags, feminine products and towels into a fine slurry to be collected and exported.
The pumps are constructed with a cast iron corrosion resistant frame. The motor is oil-filled and thermally protected.
Each model in the series operates at 1 HP, 115 or 230 V, single phase power. The pumps have a 2 inch discharge and can be used as replacement pumps for systems that also have 2 inch discharge lines (that already use LE40 or LE50-series solids handling pumps).
All models in the PRG-series come with three-year warranties serviced by Liberty.
Liberty PRG Series: Model-Specific Differences
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Omnivore LSG200-Series Grinder Pumps
The Omnivore LSG200-series grinder pumps are designed for use in systems that produce high amounts of wastewater. Think motels, apartment complexes, hotels, shopping centers - any type of facility, whether commercial or residential, with high frequency usage and high volume of waste.
LSG200 series pumps are constructed with a sturdy one-piece uni-body cast iron housing, while the impeller is 316 stainless steel. The impeller contains back vanes (or pump out vanes) to better clear solids. The pumps also feature dual seals - one unitized silicon carbide, the other Viton double-lip - for extra protection from solids.
Each model uses Liberty’s patented V-Slice cutter to macerate waste solids. The cutter is constructed of hardened 440 stainless steel - Rockwell C 58 and can perform up to 108 alternated cuts per revolution - perfect for turning waste solids into a fine slurry to be collected and transported. This video demonstrates the powerful macerating ability of the Omnivore's cutter.
The pumps operate at 2 HP and feature a 1-¼” discharge. Depending on the model, the pump could operate at 208-230 volts, 208/230 volts, 440-480 volts or 575 volts. Each model operates at either one or three phases of power.
The LSG202M and LSG202A have internal capacitors, so they do not need an external control. The LSG202M-C has an external capacitor so that model requires an additional control panel.
All models in the LSG200-series come with three-year warranties serviced by Liberty.
Liberty LSG200-Series: Model-Specific Differences
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Omnivore LSGX-Series Grinder Pumps
The Omnivore LSGX-series pumps are ideal for multi-unit land developments that share a sewage system, such as apartment complexes. LSGX pumps are similar to their cousins the LSG200, except that they are 2-stage pumps designed for high head applications.
2-stage simply means that each LSGX pump has two stainless steel impellers. The double impellers increase the velocity and can drive the maximum head up to 180 feet.
Both the LSG200 and the LSGX are constructed with the same construction materials, outer dimensions and V-Slice cutter technology. Both series also have the same guide rail configuration. Thus, Omnivore pumps are easily interchangeable within the same basin and guide rail system.
All models in the LSGX-series come with three-year warranties serviced by Liberty.
Liberty LSGX-Series: Model-Specific Differences
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Pump Products applications engineers are standing by to provide sizing assistance, price quotes and to answer any questions you may have about Liberty grinder pumps. Call our toll-free number: 1-800-429-0800.
