Gorman-Rupp Pump Performance Checklist 

Keeping your pump in shape will help reduce costs and boost profits!

Cut fuel consumption, reduce replacement parts costs and minimize pumping time on every job!

A Pump That Lets You Down

When you need it most causes obvious losses of time and money. Not so obvious, but every bit as costly, are losses you can incur with pumps that operate at less-than-peak efficiency. A pump labouring under the handicap of a suction line air leak, a corroded discharge line or a clogged impeller uses excessive energy, takes longer than necessary to do the job, and subjects parts to undue stress, causing premature failure.

How High Can The Losses Run?

A 6-inch diesel-driven, self-priming centrifugal pump operating at 25% less than peak efficiency through an eight-hour day uses approximately 30 litres more fuel than a pump operating efficiently. At $2.00 per litre over a 40-hour week that’s $2,400.00 per week LOST! And that figure doesn’t include additional service costs!

Multiply these possible hidden losses by the number of pumps you have in operation and you see why it pays to keep your pumps in top working order.

Gorman-Rupp Wants To Keep Your Pumps Efficient.

If you already own Gorman-Rupp pumps, you know how easy they are to service, so there is really no reason to let them deliver less than their best.
But even if you don’t own Gorman-Rupp pumps, you’ll find our 9-point checklist helpful because today every penny of profit counts, and we want your pumps to work as efficiently as possible.

Centrifugal Pumps

Indications that your pump isn’t operating at peak efficiency may not be dramatic, but they’re easily recognized. Look for these signs of inefficiency:
There is a noticeable difference in pump flow. Has the discharge flow visibly decreased? Is it taking your pump longer to do the same job than it used to? The slow-up might be caused by a collapsed suction hose lining, a leaking gasket, a blocked suction line, or a damaged or worn impeller or wear plate.

Your Pump Isn’t Repriming As Rapidly As It Once Did.

Most commonly, slower reprime can be attributed to excessive face clearance. If this is not the cause of your slowdown, check the following: Is the seal leaking? Are all hardware at gaskets tight? Is the suction check valve sealing properly? Is the cutwater section of the volute badly worn? Is the recirculating port blocked?

Your Pump Is Making Excessive Noise.

Does it sound like a bunch of marbles rattling in a can? This may be an indication of cavitation and could be caused by a suction lift that’s too high, a suction hose that’s too long or blocked or that has a collapsed lining, a blocked strainer, a combination of any of these, or perhaps a problem on the discharge side of the pump.

Failing Bearings Can Also Cause Excessive Noise.

Your pump is blocking frequently. The suction check valve may be blocked, the strainer may be too large or too small, face clearance could be too wide, or the strainer may be stuck in mud, blocking the suction side.

Your pump is overheating. Very likely the flow of liquid into or out of the pump is being restricted. Improper impeller clearance could be slowing repriming, or the suction strainer may be blocked.

Use This Checklist To Improve Pump Performance And Profits

Although this list is not a complete guide to pump inspection and service, it does cover the more common conditions that can impair pump efficiency. Keep in mind that excessive wear could also be the cause of any of the problems in the above paragraphs.

Suction Line

Check for air leaks. Using a vacuum gauge, make sure that the suction line, fittings and pipe plugs are airtight. Most Gorman-Rupp pumps have a tapped hole for easy connection of a vacuum gauge. Use pipe tape to seal gauge threads and pipe plugs. Replace leaky seals and badly worn hoses.

Check the suction hose lining. The rubber lining in a suction hose can pull away from the fabric, causing partial blockage of the line. If the pump develops a high vacuum but low discharge pressure, the hose lining may be blocking suction flow. Replace the hose.

Check the suction strainer. Frequent inspection and cleaning of the suction strainer is particularly important when pumping liquids containing solids. Always use the proper size strainer to prevent the pump from blocking.

Pump

Check the impeller vanes, wear plate or wear rings. The removable cover plate on many Gorman-Rupp pumps provides quick, easy inspection of the impeller and wear plate. These components should be inspected every six months or sooner, depending on pump application. They are subject to faster wear when pumping abrasive liquids and slurries. Gorman-Rupp wear plates can be replaced without replacing expensive castings.

Check the impeller clearance. Pumping efficiency will be reduced if the clearance between the impeller and wear plate is beyond the recommended limits. If the clearance is less than recommended, components will wear by rubbing, causing excess work for the engine or motor. Check the impeller clearance against the pump manual specifications and adjust it if necessary.

Check the seal. Many Gorman-Rupp pumps are equipped with a double seal which is lubricated under pressure by a spring-loaded grease cup, or an oil-lubricated seal for long, trouble-free service. Some pumps are equipped with a single seal that is lubricated by the liquid being pumped. Sand or other solids can cause rapid wear of the seal faces. Check and replace the seal if worn. Replace the seal liner or shaft sleeve if they have scratches.

Check the bearings. Worn bearings can cause the shaft to vibrate. Eventually, the pump will overheat, and sooner or later it will seaze up and stop. Replace bearings at the first sign of wear.

Check the engine or motor. The pump may not be getting the power it needs to operate efficiently. The engine may need a tune-up, or the motor may need service.

Discharge Line

Check the operating condition. Check air release devices, valves, and shock control devices for proper operation. Old discharge lines are subject to internal rusting and pitting, which cause friction loss and reduce flow by as much as 15%. Replace badly deteriorated lines.

A Word About Submersible And Diaphragm Pumps

If your submersible pump is operating at a reduced capacity, it could be caused by a worn impeller, excessive impeller clearance, low or incorrect voltage, or it could be running backward. A discharge head that’s too high, a blocked or kinked hose, or a blocked strainer could also be responsible for reduced flow. Use an amp meter and volt meter to determine if the pump is getting the proper power it needs to operate efficiently. Normal amp readings are provided in the manual accompanying your pump.

If your diaphragm pump isn’t pumping as it should, check the diaphragm, suction and discharge check valve flappers [or balls] and seats, and replace any worn parts. Check suction hose fittings for leaks, and check the plunger rod for proper adjustment.

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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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Gorman-Rupp 10 Series pumps are suitable for a range of solids handling duties, including wastewater, effluent and blood at animal process plants to re-use water at concrete batch plants. They have been delivering excellent service to industry since 1946, with their large removable cover-plate and thick vaned impellers being popular with operators. They are also available in materials of construction [SS316 or CD4MCuN], making them suitable for brine or chemical pumping applications.

10 Series Pump Advantages:

  • Ability to mount high and dry above the wet well [not in it]
  • Capital cost savings over wet well/ dry well constructions
  • Low cost of ownership
  • Greatly reduced OH&S issues
  • Easy access for monitoring or service

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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 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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The Gorman-Rupp Ultra V Series solids handling sewage and wastewater pumps 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 Ultra V Series wastewater and sewage pumps have been used 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]
  • Up to 7.6 metre suction lift
  • Handles up to 76mm spherical solids as well as stringy materials
  • Low cost of ownership
  • 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
  • Flows to 110 L/s and pressures upward of 95 metres

Download the Brochure | Ask Our Team

The Gorman-Rupp VG and VGH Series range of standard centrifugal pumps come in two styles. A general purpose style (VG) for clean liquids and a heavy duty style (VGH) for clean petroleum fluids as well as dirty water and mild abrasives.

The VG centrifugal pump has a cast iron casing and impeller, whereas the VGH centrifugal pump has a ductile iron casing, cast iron impeller with replaceable iron wear rings and a tungsten carbide/silicon carbide cartridge type mechanical seal with fluorocarbon elastomers.

Advantages include:

  • High efficiency
  • Ethanol capable [with a seal upgrade]
  • Low lifecycle costs
  • Hand primer kit available in some centrifugal pump models

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Our Team is available to answer your pump query within the hour

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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