Why Selecting the Right Mine Dewatering Pumps is of Vital Importance

Enhancing Efficiency and Safety:
The Importance of Choosing the Right Mine Dewatering Pumps

Introduction
In the dynamic and challenging world of mining, ensuring efficient operations and maintaining a safe working environment are of paramount importance. Choosing the right mine dewatering pumps is essential for the smooth functioning of the mine, as well as safeguarding the workforce. In this blog post, we will delve into the various mine dewatering pumps that are available to mine asset owners.

Some key considerations include materials of construction, how pumps are to be driven, and what style of pump suits the particular application.

Materials of Construction
Selection of appropriate materials is very important. Abrasive applications will require harder materials. Corrosive applications will require stainless steel or duplex stainless-steel materials. Areas not containing abrasives and not corrosive, may only need standard materials, like cast iron.

For abrasive applications, selecting the right material will ensure longevity of the pump, but these materials can get quite expensive. High chrome or N-hard materials, although very hard and the best for wear resistance, can be many times more expensive than hardened iron parts. So, if an application does not need “super-hard” materials, capital savings can be made by selecting durable hardened iron parts with hardness levels in the order of 400 BNH.

For corrosive applications, a variety of stainless steels are available [eg Grade 304 or 316], as well as duplex and super-duplex stainless steels. Again, it is important to get material selection right. While highly corrosion resistant super-duplex materials are suitable for very corrosive applications, water that is not so aggressive can possibly be handled by pumps manufactured from SS316, or even manufactured from cast iron, with wearing parts only fabricated from corrosion resistant materials.

Pump Drivers
Pumps can be driven in a number of ways. By electric motors, diesel engines, or even hydraulic motors.

Naturally, if power is not available at the site of particular applications, the electric motor drive is not an option. Where power is available, electric motor drives are easier to maintain, do not require re-fuelling, and are quite efficient.

Where mains power is not available, combustion engine driven pumps are most widely used, with diesel being the preferred fuel. The wide size range of sizes allows for the driving of a vast range of pumps, from small 2” ones through to high head high flow dewatering pumps.

Some applications may also suit hydraulically driven pumps. Here, PTO pumps from diesel engines are used to drive hydraulic motors. These may suit pumps mounted on trucks, or where suction lift applications exceed the limitations of self-priming pumps, and where mains power may not be available.

Pump Style
The application often drives the style of pump, but there are some “cross-over areas” where the choice of the pump is down to experience, preference or availability.

Large, high-head dewatering pumps are generally large prime-assisted diesel driven units. Water sources are often away from an electrical power source, and water needs to be pumped a long way, or over high mine walls, limiting choices to these large units.

When the flow rate is lower, mining operations may have a choice between true self-priming [wet-prime] pumps, prime assisted [dry-prime] pumps and submersible pumps [if power is available].

Prime Assist [Dry-Prime] Pumps
These pumps can be driven by electric motors or diesel engines. They need an auxiliary priming system, inclusive of an air separation [priming] chamber, a non-return valve [to prevent the pump trying to pull a vacuum on the discharge side of the pump, as well as the suction], and a priming system [could be a compressor/venturi, diaphragm priming pump, or dedicated vacuum pump]. Although more versatile, with larger flow ranges and larger pressures, these pumps do require more maintenance than “true” self-priming pumps, and because they are more complicated, may not be considered as reliable as “wet-prime” pumps.

Self-priming Pumps
Also known at “true” self-priming or “wet-prime” pumps, these pumps use an integral tank within their casing to allow the impeller to turn in a “flooded” environment to create the required vacuum to prime. A much simpler pump that is easier to maintain, and more reliable. The only drawback of this technology is that they are limited in their flow range [to about 250 L/s], and their pressure [limited to about 90 metres]. They also need to be charged with water to enable priming. These pumps provide a genuine alternative where applications fall within their hydraulic range.

Submersible Pumps
Electro submersible pumps are another alternative when electrical power is available. These pumps are available with wide flow ranges, and some with high pressures. Voltages at sites vary, with 415v and 1000v being popular.

These pumps can be mounted under pumptoons, or be located in purpose built wet wells. They are also available in a wide variety of materials.

Hydraulic Submersible Pumps
When electric power is not available and the suction lift is higher than a wet or dry self-priming pump can reach, a hydraulically driven submerible pump could be the answer. These pumps have a hydraulic motor that is driven by a diesel engine power-pack.

Ready to build the perfect diesel fuel pump system for your project? We’re standing by to help.

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Videos:

Watch videos here showcasing Gorman-Rupp pumps:

GORMAN-RUPP PUMPS FOR THE MINING INDUSTRY

GORMAN-RUPP PUMPS DELIVERING EXCELLENCE

GORMAN-RUPP PUMP VS. COMPETITOR PUMP

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Our expert team is standing by for any questions you have about how best to configure your pump system.

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Gorman-Rupp Pumps

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6500 Series® end suction centrifugal pumps are based on the proven technology of Gorman-Rupp’s Prime Aire® and Prime Aire Plus® priming-assisted pump models. The 6500 Series was designed to extend Gorman-Rupp’s end suction centrifugal pump offering and to better serve applications where a suction lift is not required.  A double volute mitigates shaft breakage and extends the life of the mechanical seals, wear rings and bearings, all while maintaining hydraulic efficiency, while a side access port allows for easy access to pump interior for inspection and clean out while the pusher bolt capability assists in the removal of the suction flange.

Advantages include:

  • High efficiency
  • Alloy steel shafts with stainless steel options
  • Dual sight gauges for bearing and seal cavities
  • Smart Scroll® indexable discharge location
  • Atmospheric vent
  • Oversized bearings for longer bearing life
  • Double volute on larger models
  • Solids-handing models include side access for inspection and clean out

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The Gorman-Rupp G Series range of self priming positive displacement rotary gear pumps is designed to provide superior performance in the transfer of process fluids, unmatched in the industry. Available in Medium-Duty , Heavy-Duty and Extreme-Duty (abrasive service) models, pump materials include cast iron, cast steel and stainless steel.

G Series self priming pumps are manufactured with unique features that enable them to perform better and last longer on countless applications, providing quality and reliability that make the G Series the premier pump in the industry.

Advantages include:

  • An automatic idler pin lubrication system uses the pumped fluid to continuously cool and lubricate the idler pin and bush to reduce wear in this area.
  • An internal seal cavity venting system provides a continuous flow of liquid through the seal area, ensuring cooling and reducing pressure. This reduces seal face
  • load, increasing seal life.
  • A deep “end-feed” area offers superior priming performance under low inlet pressure conditions and/or high viscosity liquids.
  • Easy to service
  • Viscosities to 440,000 cSt
  • Pressures to 20.7 bar (300 psi)
  • Flows to 2200 litres per minute
  • Handle a variety of liquids , including highly viscous, high temperature and abrasive fluids
  • Widest range of sealing options in the industry
  • High strength material eliminates the need for special steel fittings traditionally needed for viscous applications.
  • Widest range of housing ports
  • Widest range of bushing materials

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The Gorman-Rupp Super T Series self-priming dewatering pump has been the world benchmark for this technology since 1963 (>55 years). These engine driven pumps are direct coupled to diesel engines through flexible flywheel couplings to ensure perfect alignment between pump and engine. These are mounted onto our “engitank” platform. This platform includes an extra heavy duty fuel tank base with a 450 litre capacity, lifting points on 4 corners, fork lift pockets, and a central lifting frame. A sheet-metal roof is provided to help protect the engine from the elements.

Advantages include:

  • Simple priming system. Just fill casing with water.
  • No complicated “add-on” priming systems.
  • Pump solid particles up to 76mm dia
  • Pump stringy materials [rags, bags and wipes] with Eradicator technology
  • Greatly reduced OH&S issues
  • Easy access for monitoring or service
  • Advanced safety features to protect operators
  • Improved maintenance features to greatly reduce maintenance time and costs, with externally adjustable clearances.
  • A variety of materials of construction to handle abrasive and/or corrosive fluids
  • Any engine brand required by the customer.
  • Choice of skid or trailer mounted configuration

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The Ultra V Series is Gorman-Rupp’s higher pressure self-priming dewatering pump. These engine driven pumps are direct coupled to diesel engines through flexible flywheel couplings to ensure perfect alignment between pump and engine. These are mounted onto our “engitank” platform. This platform includes an extra heavy duty fuel tank base with a 450 litre capacity, lifting points on 4 corners, fork lift pockets, and a central lifting frame. A sheet-metal roof is provided to help protect the engine from the elements.

Advantages include:

  • Higher pressures
  • Simple priming system. Just fill casing with water
  • No complicated “add-on” priming systems
  • Pump solid particles up to 76mm dia
  • Pump stringy materials [rags, bags and wipes] with Eradicator technology
  • Greatly reduced OH&S issues
  • Easy access for monitoring or service
  • Advanced safety features to protect operators
  • Improved maintenance features to greatly reduce maintenance time and costs, with externally adjustable clearances.
  • A variety of materials of construction to handle abrasive and/or corrosive fluids
  • Any engine brand required by the customer.
  • Choice of skid or trailer mounted configuration

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The Gorman-Rupp Super U Series self-priming effluent and grey water pumps combine the best features of quality trash pumps in Australia with increased efficiency and higher heads to pump through smaller and/or longer discharge piping systems or overcome the losses in filter systems.
These centrifugal pumps have been designed for economical, heavy duty (24/7) trouble-free operation.

Advantages include:

  • Ability to mount high and dry above the water (not in it)
  • Self-prime to 7 metres
  • Low cost of ownership
  • High efficiencies [to 70%] for lower energy costs
  • Greatly reduced OH&S issues
  • Easy access for monitoring or service
  • Advanced safety features to protect operators
  • Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
  • A variety of materials of construction to handle abrasive and/or corrosive fluids

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The Gorman-Rupp PAH Series of prime assist (also known as dry prime or auto prime) centrifugal pumps are capable of delivering high heads and/or high flows for applications from wastewater bypassing to mine dewatering.

Field adjustable running clearances mean this pump can be kept at peak efficiency and left in the field for longer (instead of having a trip back to the workshop for a wear ring change).

Advantages include:

  • Ability to mount high and dry above the water (not in it)(to 7.6m)
  • Low cost of ownership
  • Greatly reduced OH&S issues
  • Easy access for monitoring or service
  • Improved maintenance features to greatly reduce maintenance time and costs
  • A variety of materials of construction to handle abrasive and/or corrosive fluids
  • Any engine brand required by the customer
  • Choice of skid or trailer mounted configuration

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The Gorman-Rupp Super T Series self-priming centrifugal wastewater/sewage pump has been the world benchmark for this technology since 1963 (>50 years). They have been designed for economical, trouble-free operation, with superior solids handling capability and a large inspection cover to access pump internals for service or blockage removal. Super T Series pumps now have several variants that either improve solids handling or efficiency.

Advantages include:

  • Self-Priming pump has the ability to mount high and dry above the wet well (not in it)
  • Up to 7.6 metre suction lift
  • Handle spherical solids to 76mm in diameter
  • Low cost of ownership
  • Greatly reduced OH&S issues – no more working over water/heights/cranes/heavy swinging weights
  • Surface-mounted pumps with easy access for monitoring or service
  • Advanced safety features including pressure relief valve to protect operators
  • Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
  • A variety of materials of construction to handle abrasive and/or corrosive fluids
  • “Eradicator” technology for handling rags, wet wipes, rope etc
  • “Eradicator Plus” technology for extreme-duty stringy materials applications

Super T Series With Eradicator
Super T Series with Eradicator Plus

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The Gorman-Rupp Super T Series pump with Eradicator™ Solids Management System are a series of self-priming centrifugal pumps designed specifically for handling municipal and industrial wastewater containing stringy, difficult-to-pump, solids in suspension (such as wet wipes, rags and feathers).

They have been designed for economical, trouble-free operation, with design features that deliver superior solids handling capability and a large inspection cover to access pump internals for service or blockage removal. Gorman-Rupp Super T Series wastewater and sewage pumps have been used for pumping of WAS and RAS and for digester recirculation with great success in wastewater treatment plants around the country, as well as food process plants, paper mills and other heavy industries. The Eradicator™ system advances the solids handling capabilities of this range.

Advantages include:

  • Ability to mount high and dry above the wet well [not in it]
  • Self-priming to 7.6 metres
  • Low cost of ownership
  • Greatly reduced OH&S issues
  • No cranes or hoists for access
  • Easy access for monitoring or service
  • Advanced safety features to protect operators [such as the lightweight inspection cover-plate]
  • Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
  • A variety of materials of construction to handle abrasive and/or corrosive fluid.
  • Sizes 2” to 10”, with flows to 200 L/s and heads to 40 metres.

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The Gorman-Rupp Ultra V Series is the most advanced self-priming centrifugal wastewater and sewage pump range on the market today.

They are high performance, high head, and high-efficiency pumps, designed to deliver a long and low maintenance service life, with a low cost of ownership.

Ultra V Series pumps are now also available with “Eradicator” technology to enable them to handle stringy materials such as rags, wet wipes, feathers and other debris that might otherwise block a pump.

Advantages include:

  • Ability to mount high and dry above the wet well [not in it]
  • Self-priming to 7.6 metres
  • Flows to 110 L/s and pressures upwards of 95 metres
  • Efficiencies up to 20% higher than any other solids handling self-primer
  • Higher pressures (heads) (up to 300%) than any other solids handling self-primer
  • Greatly improved operator safety
  • Easy access for monitoring or service
  • Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
  • A variety of materials of construction to handle abrasive and/or corrosive fluids

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Hydro’s experts are standing by to help you get the best pump, aerators and genuine spare parts for your specific project.

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Hydro Innovations is proud to distribute a broad range of quality, reliable and industry-leading industrial pumps and aerators.

Gorman-Rupp is the world leader in self-priming centrifugal wastewater pump technology, and invests heavily in R&D, and in training for their international representatives – like Hydro Innovations.

This puts us in an excellent position to make the very best recommendations for our Australian customers.

Our other suppliers, Ragazzini of Italy and EDUR of Germany, are also world leaders in their respective technologies (Peristaltic Pumps – Ragazzini, and Specialist centrifugal pumps – EDUR).

We carry a very large inventory of pumps and spare parts for all of these brands, to help us to deliver industry-leading service.

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