Knowledge Base/Glossary

Easy Access

Because Gorman-Rupp self-priming pumps are located at ground level, high and dry above the liquid level, they are easy to access for monitoring, service and repair.

Whereas submersible pumps can only be accessed by opening wet well lids (exposing operators to “working at heights” and “working over water”) and winching or craning pumps to the surface (exposing operators to “working with swinging weights”), operators can access Gorman-Rupp self primers at ground level.

End suction pumps will often need a “dry-well” which is accessed by going downstairs or a ladder. They need isolation valves on the suction. This makes them more difficult to access than Gorman-Rupp self primers

Easy Access

Because Gorman-Rupp self priming pumps are located at ground level, high and dry above the liquid level, they are easy to access for monitoring, service and repair.

Whereas submersible pumps can only be accessed by opening wet well lids [exposing operators to “working at heights” and “working over water”] and winching or craning pumps to the surface [exposing operators to “working with swinging weights”], operators can access Gorman-Rupp self primers at ground level.

End suction pumps will often need a “dry well” which is accessed by going down stairs or a ladder. They need isolation valves on the suction. This makes them more difficult to access than Gorman-Rupp self primers.

Easy Access

Because Gorman-Rupp self priming pumps are located at ground level, high and dry above the liquid level, they are easy to access for monitoring, service and repair.

Whereas submersible pumps can only be accessed by opening wet well lids [exposing operators to “working at heights” and “working over water”] and winching or craning pumps to the surface [exposing operators to “working with swinging weights”], operators can access Gorman-Rupp self primers at ground level.

End suction pumps will often need a “dry well” which is accessed by going down stairs or a ladder. They need isolation valves on the suction. This makes them more difficult to access than Gorman-Rupp self primers..

Edur  Torque- Flow Solids Sizes

The Edur Torque-Flow (FUB) range will handle the following size solids:

FUB 300 = Max. 30mm

FUB 400 = Max. 40mm

FUB 600 = Max. 50mm

FUB 700 = Max. 80mm

FUB 800 = Max. 50mm

Enclosed Pipeline

Because the JS Lamella pump uses an enclosed pipeline system, the product is much less likely to be contaminated by insects, dust or water [rain]. This cannot be guaranteed when using screw conveyers or manual transfer systems like fork lift and bins.

Ramparts P and iPC Series of single acting air driven diaphragm pumps are built tough. Here’s what
makes them the toughest sludge or slurry pumping choice:

• Extra thick cast iron casings (up to 32mm thick – depending on pump model)
• Separately constructed cast iron ball check valves (not just part of the discharge piping)
• Bigger, thicker, heavier diaphragms.
• Replaceable ball seats

Extreme Duty G Series Pumps 

Gorman-Rupp Extreme Duty G Series Pumps are the most rugged, wear resistant gear pumps in the world. Designed to survive the severe challenge of liquids containing abrasives, the Gorman-Rupp GHA Extreme Duty pumps combine proven gear pump technology with state-of-the-art wear-resistant features, making them the world’s toughest, longest-lasting gear pumps. Duty parameters are as follows:

Heavy Duty Pumps

Gorman-Rupp Heavy Duty G Series Pumps are designed for the most demanding clean liquid applications, combining high performance materials and innovative design to outperform all other pumps of their type. They are the most capable and versatile gear pump in the industry. Duty parameters are as follows:-

GHS Cast Iron Pumps

GHS Cast Steel Pumps

GHS Stainless Steel Pumps

Medium Duty G Series Pumps

Gorman-Rupp Medium Duty G Series Pumps are designed for general intermittent duties. Duty parameters are as follows:

G Series Bushing Options

G Series pumps offer the widest range of bushing options in the industry. These options include:-

G Series Housing Ports 

All Gorman-Rupp G Series rotary gear pumps are available in a variety of port sizes,
orientation and flange type. Each hydraulic size has up to 3 different port sizes to
enable the perfect matching to pipe sizes. Ports are also available as 90^o or 180^o,
which can be rotated in 45^o increments.

The various port sizes can be supplied with tapped ports, 125# ANSI Flanged,
250# ANSI Flanged, or 25 bar DIN Flanged.

G Series Housing Ports 
All Gorman-Rupp G Series rotary gear pumps are available in a variety of port sizes,
orientation and flange type. Each hydraulic size has up to 3 different port sizes to
enable the perfect matching to pipe sizes. Ports are also available as 90^o or 180^o,
which can be rotated in 45^o increments.

The various port sizes can be supplied with tapped ports, 125# ANSI Flanged,
250# ANSI Flanged, or 25 bar DIN Flanged.

G Series Pump Variety of Fluids

G Series pumps a variety of fluids, including, but not limited to:

Hydrocarbons, Petrochemicals and similar:

• Oils                                         * Fuels
• Fats                                        * LPG

Viscous Liquids and Polymers:

• Glues/ Adhesives                   *Grease
• Asphalt                                   * Varnish
• Styrenes

Food Process:

• Liquid margarine                   *Honey                              * Corn Syrup
• Shortening                            * Vegetable oils                 * Fats
• Hot cooking oils                    * Blood                              * Liquid sugars
• Chocolates                           * Brewer’s yeast                * Molasses

Thermosensitive Liquids:

• Resins                                   * Tar                                  * Wax

Acids:

• Acetic                                    * Phosphoric                      * Palmitic

Solvents:

• Ketones                                * Acetone

Manufacturing:

• Paints                                    * Inks                              * Hydraulic fluid
• Fuels (diesel, kerosene etc)                                        * Butane
• Alcohols                                 * Anhydrous Ammonia   * Glycol
• Varnish                                  * LP Gas                         * Caustics
• Sulphites                                * Freons                         * Grease

G Series Sealing Options

G Series pumps offer the widest range of sealing options in the industry. These options include:

Less maintenance

Maintenance on a screw conveyor can get expensive. Re-welding flights, straightening screws, wear on the flights are all maintenance issues for screw conveyors transporting tough materials like cattle bones. Also, when distances become too long, a screw conveyor becomes less economical and more problematic.

If the right choice is a pump, to keep product in an enclosed pipe system and/or transport longer distances, then a JS Lamella should be the choice. Advantages of a JS Lamella over “comparable” pumps are as follows:

• All wearing parts are replaceable on JS Lamella pumps.
• Top and Bottom plateswear much slower than cam discs, so they only need replacing every 4-5 times the Cam discs are replaced. In “similar” pumps, the top and bottom plates are part of the cam disc arrangement, meaning repairs are more expensive than with JS Lamella pumps.
• Wearing bars are bolted to the rotor so that no material can lodge between the rotor and the wearing bars. If they are not bolted (like on competitor pumps), pumped material can squeeze between wear bar and rotor, pushing the wear bar onto the lamella’s. This causes premature lamella wear and jamming of lamella’s.
• A standard Lamella pump is designed with Mechanical seals, which take up less space than other seals (like rotoglyde seals and gland packing). Mechanical seals guarantees a 100 % seal. They also protect the bearings better from product ingress.
• On a JS Lamella pump the shaft end and Rotor are assembled with 8 bolts, which are tightened to a specified torque. On “similar” pumps the rotor and shaft end are bolted but also welded together. By not welding those 2 parts, it is much easier to disassemble the parts for service and increases service life.
• Key wearing parts like the rotor, lamellas, wearing plates, cam discs, top- and bottom plates and wearing bars, can be supplied in tool steel quality stainless steel, with high strength, wear resistanceand excellent corrosion resistance.
• JS Proputec Lamella pump customers (who have also used “similar” pumps), claim that JS Proputec wear parts are stronger and last longer than the competitor pump/s. The difference is greater when the pumps are used for hard and tough materials (such as cattle bones).

Maintenance Features

Gorman-Rupp Ultra V Series self priming pumps have been designed to be the easiest and most cost effective wastewater pumps to service and maintain. The following features make life easier for operators and very cost effective for asset owners:

Less Blockages

Because all internal passages will handle a 76mm spherical solid on most models, and pumps come standard with a patented self cleaning wear plate system to resist choking from stringy materials such as rags, Ultra V Series pumps will choke much less than most other wastewater pumps. This minimises downtime, increasing productivity.

Easy Blockage Removal

All pumps will eventually choke on something. But unlike submersible pumps that require cranes, safety barriers and several operators, Ultra V Series pumps have a large removable cover-plate, allowing access to pump internals in minutes, by just one operator, making blockage removal a quick and easy task.

Easy and Simple Clearance Adjustment

Most centrifugal pumps have radial clearances between impeller and wear rings. Gorman-Rupp Ultra V Series pumps have axial clearances that are adjusted through external adjusting screws on the cover-plate. One operator with 2 spanners can adjust clearances in just 4 minutes. Adjusting clearances on some submersible pumps could take several operators most of an entire day.

Easy and Simple Wear Plate Replacement

Wear plates on a Gorman-Rupp Ultra V can be replaced in just a few minutes. Operators just remove the pump inspection cover, and replace the wear plate which is bolted to it via 4 studs. Compare this to some centrifugal and submersible pumps, having wear rings that often require heating the casing ring and/or cooling the wear ring, and often requiring the chiselling off of the old one.

Easy Major Overhaul

The major wearing components in a Gorman-Rupp Ultra V, form part of the rotating assembly. This includes the seal, bearings, impeller and seal plate. This “cartridge” is easily replaced on an Ultra V, without needing to take it back to the workshop or even remove the pump from the piping system. Operators simply remove the old rotating assembly by removing 4 bolts, then “plug in” the new one. The old one can then be taken back to the workshop where operators can take their time to replace any worn parts and then use the repaired rotating assembly as a back-up spare.

Replacing Flap Valve

The Ultra V Series range of pumps has the most easily replaced suction flap valve on the market to replace or clean. Just isolate the pump, remove a small cover, then just slip the flap valve out to clean or replace.

Maintenance Features

Gorman-Rupp Super U Series self priming pumps have been designed to be the easiest and most cost effective effluent pumps to service and maintain. The following features make life easier for operators and very cost effective for asset owners:

Easy Blockage Removal

All pumps will eventually choke on something. But unlike submersible pumps that require cranes, safety barriers and several operators, Super U Series pumps have a large removable cover-plate, allowing access to pump internals in minutes, by just one operator, making blockage removal a quick and easy task.

Easy and Simple Clearance Adjustment

Most centrifugal pumps have radial clearances between impeller and wear rings. Gorman-Rupp Super U Series pumps have axial clearances that are adjusted through external adjusting screws on the cover-plate. One operator with 2 spanners can adjust clearances in just 4 minutes. Adjusting clearances on some submersible pumps could take several operators most of an entire day.

Easy and Simple Wear Plate Replacement

Wear plates on a Gorman-Rupp Super U can be replaced in just a few minutes. Operators just remove the pump inspection cover, and replace the wear plate which is bolted to it via 4 studs. Compare this to some centrifugal and submersible pumps, having wear rings that often require heating the casing ring and/or cooling the wear ring, and often requiring the chiselling off of the old one.

Easy Major Overhaul

The major wearing components in a Gorman-Rupp Super U form part of the rotating assembly. This includes the seal, bearings, impeller and seal plate. This “cartridge” is easily replaced on a Super U, without needing to take it back to the workshop or even remove the pump from the piping system. Operators simply remove the old rotating assembly by removing 4 bolts, then “plug in” the new one. The old one can then be taken back to the workshop where operators can take their time to replace any worn parts and then use the repaired rotating assembly as a back-up spare

Materials of Construction

Gorman-Rupp pumps can be purchased in a variety of materials of construction, to suit the liquid being pumped.

The following table shows the available materials of construction of the Wastewater and effluent pump series.

‘* Denoted all models

‘# Denotes some models

“Fitted” refers to pumps that are supplied with the standard construction pump, but fitted with special material impeller, wear plate, seal plate and shaft.

“HDI” is Gorman-Rupp’s “Hard Iron”. This material is used to resist the action of abrasive materials such as grit. This material has a Brinell hardness of approximately 400, making it approximately twice as hard as cast iron.

316SS is a marine grade stainless steel, used for service where liquids are corrosive. It has a PREN [Pitting Resistance Equivalent Number] of 27.1 and a Brinell hardness of approximately 217.

CD4MCu is a Duplex Stainless Steel, used where services are corrosive and abrasive. It has a PREN of 32.1 and a hardness of 280-300 on the Brinell scale.

High Chrome impellers, available in Super T Series models T3, T4 and T6 have a brinell hardness of approximately 650 and is an excellent material choice for highly abrasive service.

The following table shows the available materials of construction of the clean water and fuel handling pumps pump series.

Gorman-Rupp G Series [rotary gear pumps] are available in the following materials of construction:

• All Iron (including Ductile iron rotors – 2.5 times the strength of cast iron)
• All Steel
• All stainless steel
• Extreme Duty fitted (hardened components to resist wear)

Maintenance Features

Gorman-Rupp PAH Series of “auto prime” pumps have been designed to be the easiest and most cost effective “dry prime” pumps to service and maintain. The following features make life easier for operators and very cost effective for asset owners:

Less Blockages

Because all internal passages will handle a 76mm spherical solid [on trash pump models], PAH Series pumps will choke less than most other wastewater pumps. This minimises downtime, increasing productivity.

Easy Blockage Removal

All pumps will eventually choke on something. But unlike common dry prime pumps, Gorman-Rupp PAH Series pumps have a removable cover-plate, allowing access to pump internals and/or the air separation chamber screen in minutes, by just one operator, making blockage removal a quick and easy task.

Easy and Simple Clearance Adjustment

Most centrifugal pumps [including most dry prime pumps] need to have their wear rings replaced when clearances have worn to an unacceptable level. This will require pumps to be pulled down and maybe casings heated and/or wear rings cooled, and maybe the old wear plate chiselled out, then a new one fitted. Gorman-Rupp PAH Series pumps have clearances that are adjusted through external adjusting screws on the back cover-plate. One operator with 2 spanners can adjust clearances in just 4 minutes. Adjusting clearances on other types of dry prime [or auto prime] pumps could take several operators most of an entire day. This means a Gorman-Rupp PAH Series will spend more time “at the coal face” and less time in the workshop.

Pump Operator Safety

Duty of Care

It is incumbent upon designers, engineers and asset owners to provide the safest possible environment for operators of pumping equipment. For wastewater pump operators, a danger that is ever present is that of falling into open wet well pits. Even covered wells need to be opened for pump maintenance as with sewage pump stations. This risk is unavoidable when using submersible pumps, because the pumps are at the bottom of the wastewater wells. When pumps choke or need maintenance, safety lids need to be opened and operators are exposed to falls. This is a serious risk, with potential of serious injury or even death.

This risk can be greatly reduced or even eliminated by using Gorman-Rupp Super T Series self priming wastewater pumps, because they can be placed high and dry above the wet well, with no need to ever open wet well lids to expose operators to the risk of falling or drowning.

Reduce Fat Build-Up

One of the issues that plague some wastewater pump installations is that of fat, sediment or debris build-up in wet wells. This has the potential of causing odour issues, regular pump chokes, damage to wet well walls and reduced system reliability. By using a “self-cleaning wet well” design in conjunction with Gorman-Rupp Super T series pumps, wet wells have their contents removed (including fat, sediment and other debris) with each and every pump cycle. This removes odour issues, reduces the chances of gas production, reduces the risk of attack to concrete walls, and greatly reduces the need for entry into these wells for the purposes of cleaning etc.

Pump Safety Features

Gorman-Rupp Super T Series pumps also have other safety features. A safety pressure relief valve in the pump will vent any excessive pressure build-up. As a back-up to this, the suction check valve has a burst disc that will “pop” if for some reason the pressure relief valve malfunctions (venting any pressure build-up back to the wet well).

Pump Operator Safety

Duty of Care

It is incumbent upon designers, engineers and asset owners to provide the safest possible environment for operators of pumping equipment. For wastewater pump operators, a danger that is ever present, is that of falling into open wet well pits. Even covered wells need to be opened for pump maintenance as with sewage pump stations. This risk is unavoidable when using submersible pumps, because the pumps are at the bottom of the wastewater wells. When pumps choke or need maintenance, safety lids need to be opened and operators are exposed to falls. This is a serious risk, with potential of serious injury or even death.

This risk can be greatly reduced or even eliminated by using Gorman-Rupp Ultra V Series self priming wastewater pumps, because they can be placed high and dry above the wet well, with no need to ever open wet well lids to expose operators to the risk of falling or drowning.

Pump Safety Features

Gorman-Rupp Super U Series pumps also have other safety features. A safety pressure relief valve in the pump will vent any excessive pressure build-up. As a back-up to this, the suction check valve has a burst disc that will “pop” if for some reason the pressure relief valve malfunctions (venting any pressure build-up back to the wet well).

Duty of Care

It is incumbent upon designers, engineers and asset owners to provide the safest possible environment for operators of pumping equipment. For wastewater pump operators, a danger that is ever present, is that of falling into open wet well pits. Even covered wells need to be opened for pump maintenance as with sewage pump stations. This risk is unavoidable when using submersible pumps, because the pumps are at the bottom of the wastewater wells. When pumps choke or need maintenance, safety lids need to be opened and operators are exposed to falls. This is a serious risk, with potential of serious injury or even death.

This risk can be greatly reduced or even eliminated by using Gorman-Rupp Ultra V Series self priming wastewater pumps, because they can be placed high and dry above the wet well, with no need to ever open wet well lids to expose operators to the risk of falling or drowning.

Reduce Fat Build-Up

One of the issues that plague some wastewater pump installations is that of fat, sediment or debris build-up in wet wells. This has the potential of causing odour issues, regular pump chokes, damage to wet well walls and reduced system reliability. By using a “self-cleaning wet well” design in conjunction with Gorman-Rupp Ultra V series pumps, wet wells have their contents removed (including fat, sediment and other debris) with each and every pump cycle. This removes odour issues, reduces the chances of gas production, reduces the risk of attack to concrete walls, and greatly reduces the need for entry into these wells for the purposes of cleaning etc.

Pump Safety Features

Gorman-Rupp Ultra V Series pumps have more in-built safety features than any other self priming centrifugal pump. A safety pressure relief valve in the pump will vent any excessive pressure build-up. As a back-up to this, the suction check valve has a burst disc that will “pop” if for some reason the pressure relief valve malfunctions [venting any pressure build-up back to the wet well]. Ultra V pumps also have the safest fill port in the industry, by guarding operators against pump contents being sprayed at them when the pump fill port needs to be opened for inspection.

Pump Operator Safety

Duty of Care

It is incumbent upon designers, engineers and asset owners to provide the safest possible environment for operators of pumping equipment. For effluent pump operators, a danger that is ever present is that of falling into open wet well pits. Even covered wells need to be opened for pump maintenance. This risk is unavoidable when using submersible pumps, because the pumps are at the bottom of the wet wells. When pumps choke or need maintenance, safety lids need to be opened and operators are exposed to falls. This is a serious risk, with potential of serious injury or even death.

This risk can be greatly reduced or even eliminated by using Gorman-Rupp Super U Series self priming effluent pumps, because they can be placed high and dry above the wet well, with no need to ever open wet well lids to expose operators to the risk of falling or drowning.

Pump Safety Features

Gorman-Rupp Super U Series pumps also have other safety features. A safety pressure relief valve in the pump will vent any excessive pressure build-up. As a back-up to this, the suction check valve has a burst disc that will “pop” if for some reason the pressure relief valve malfunctions (venting any pressure build-up back to the wet well).

The ES 200 x 200 has several appearance options to help it blend in with the surrounding environment. The fibreglass can be coloured in any colour from the RAL colour spectrum, but can also be fitted with a brick or stone look facing.

Pump Station Controls

Although our Gorman-Rupp packaged pump stations can be supplied “less controls”, we can provide controls that are intuitive and designed specifically for self priming pumps. PLC based controls with simple touch screen interface is combined with pinpoint precision start/stop set points for one or more pumps. Controls can be supplied with DOL starters, soft starters or with VFD’s. Advantages of using Gorman-Rupp designed controls are as follows:

• All components in Gorman-Rupp pump stations are warranted for 5 years [including the controls].
• The controls are purpose built for self priming pumps.
• Controls can incorporate an air bubbler liquid level control, improving reliability and safety.
• Touch screen interface is very intuitive and easy to operate.
• Locally supported in Australia

Fully equipped Auto-Start 

With Gorman-Rupp packaged sewage pump stations, you only need to connect the piping, hook up the power…. and your station is ready to go.

With a Gorman-Rupp engineered system, there is no need to dig a valve vault, no need to install guide rails or discharge elbows in the wet well, and no need to integrate all of the systems on site when all the equipment arrives in pieces. Your Gorman-Rupp ES Auto-Start pump station is fully equipped and ready to go. This includes:

• Sewage pumps
• Pump motors
• Auxiliary combustion engine back-up driver
• Isolation valves
• Non-return valves
• Air release valves
• All inter-connecting piping
• Suction and discharge gauges to monitor pump performance
• Motor control centre
• Liquid level control system
• Ventilation
• Internal lighting
• All equipment is ready to mount into an existing or purpose built enclosure
• Complete system testing prior to the station leaving Gorman-Rupp
• 5 Year warranty on everything within the station

Fully equipped Base Mounted 

With Gorman-Rupp packaged sewage pump stations, you only need to connect the piping, hook up the power…. and your station is ready to go.

With a Gorman-Rupp engineered system, there is no need to dig a valve vault, no need to install guide rails or discharge elbows in the wet well, and no need to integrate all of the systems on site when all the equipment arrives in pieces. Your Gorman-Rupp ES Base Mounted pump station is fully equipped and ready to go. This includes:

• Sewage pumps
• Pump motors
• Isolation valves
• Non-return valves
• Air release valves
• All inter-connecting piping
• Suction and discharge gauges to monitor pump performance
• Motor control centre
• Liquid level control system
• Ventilation
• Internal lighting
• All equipment is ready to mount into an existing or purpose built enclosure
• Complete system testing prior to the station leaving Gorman-Rupp
• 5 Year warranty on everything within the station

Fully equipped ES 200 x 200

With Gorman-Rupp packaged sewage pump stations, you only need to connect the piping, hook up the power…. and your station is ready to go.

With a Gorman-Rupp engineered system, there is no need to dig a valve vault, no need to install guide rails or discharge elbows in the wet well, and no need to integrate all of the systems on site when all the equipment arrives in pieces. Your Gorman-Rupp ES 200 x 200 pump station is fully equipped and ready to go. This includes:

• Sewage pumps
• Pump motors
• Isolation valves
• Non-return valves
• Air release valves
• All inter-connecting piping
• Suction and discharge gauges to monitor pump performance
• Motor control centre
• Liquid level control system
• Ventilation
• Internal lighting
• Complete system testing prior to the station leaving Gorman-Rupp
• 5 Year warranty on everything within the station

Fully equipped ES 210 x 310

With Gorman-Rupp packaged sewage pump stations, you only need to connect the piping, hook up the power…. and your station is ready to go.

With a Gorman-Rupp engineered system, there is no need to dig a valve vault, no need to install guide rails or discharge elbows in the wet well, and no need to integrate all of the systems on site when all the equipment arrives in pieces. Your Gorman-Rupp ES 210 x 310 pump station is fully equipped and ready to go. This includes:

• Sewage pumps
• Pump motors
• Isolation valves
• Non-return valves
• Air release valves
• All inter-connecting piping
• Suction and discharge gauges to monitor pump performance
• Motor control centre
• Liquid level control system
• Ventilation
• Internal lighting
• All equipment mounted in a 2.1m x 3.1m fibreglass enclosure
• Complete system testing prior to the station leaving Gorman-Rupp
• 5 Year warranty on everything within the station

Level Control System

Gorman-Rupp engineered systems can be supplied with all of the usual level control systems, but our preference is for the safest and most advanced “air bubbler system”. The principle involves pumping a low volume of air into a tube, which runs down into the wet well. The pressure is accurately measured using a pressure switch. At a fixed density, the hydrostatic pressure remains proportional to the level of water in the wet well. This measurement technology is used anywhere that reliable liquid measurement is required.

The compact compressor/pressure switch device is located in the control panel “high and dry” out of the wet well. Only the air tubing and the air enter the wet well. Advantages include:

• No opening wet well lids to access the level control device [like ultrasonics, submersible transducers or floats].
• Measurement not affected by surface foam, mist or suspended matter.
• Reliable measurement over the long term.
• Long compressor life
• 24V power supply
• Quick release connection terminals
• Maximum margin for error 0.3%

Lower Civil Costs

With a Gorman-Rupp engineered system, there is great potential to save on civil engineering and site work. Firstly, because the pumps are self priming, only the suction lines are in the wet well, so the sump can be significantly smaller [while delivering the same flow rate capability]. There is also no need to construct a separate valve vault/chamber and assemble all the valves into it as part of the installation procedure, because Gorman-Rupp systems are supplied with all the valves fitted.

The Gorman-Rupp packaged pump stations are pre-tested, completely assembled and ready for installation. Just place them, bolt them down, attach the suction and discharge lines, connect the power, and the job is done.

Lower Operational Costs

A Gorman-Rupp engineered system will save the asset owner many thousands of dollars [when compared to the submersible pump alternative] over the life of the pump station. The reasons are many:

• Access and maintenance are much easier for operators, because the pumps are at ground level and much easier to access.
• The pumps themselves are the easiest to maintain in the industry. Just 10 minutes for one operator to adjust internal pump clearances [on both pumps] is just one example of this.
• Pumps can be set up with a “self cleaning wet well” so that the contents of the wet well can be removed with every pump cycle [including fat and silt]. This reduces the need for “sucker trucks” to remove silt and fat build-up, because the Gorman-Rupp system can greatly slow down or eliminate this build-up from happening. Solving the problem, not treating the symptom is the answer to this often problematic occurrence.
• Very long pump service life when compared to submersible pumps.
• No guide rails or discharge bends to ever replace.
• No real need to ever open the wet well lids. This means the number of operators needed to attend site for blockage removal or maintenance can be reduced.
• Operators can trouble-shoot much easier with pressure gauges than amp readings. Pumps do pressure, not amps. Motor amp readings can be misleading, whereas gauges on the suction and discharge of a self priming pump will tell operators exactly where any issue lies. This cannot be said for amp readings on submersible pumps.
• No false call-outs because of pump seal moisture detectors. Self priming pumps don’t have or need them.

Sound Attenuation

Gorman-Rupp ES 200 x 200 pump stations can be supplied with an internal acoustic lining to reduce sound emissions to as low as 43 dB(A) at 1 metre. This specification is likely to meet all national, state and local requirements for sound emissions near domestic residences in Australia.

This low rating is achieved from a combination of vibration isolation, sound rated panelling, and applying acoustic surrounds to the ventilation system.

Steep System Head

When using Gorman-Rupp’s pump stations, a wide range of pumping solutions is available. One of these is the unique “parallel/series” piping arrangement that is only possible using self priming pumps. With this arrangement, pumps can alternate as is the usual case for sewage pump stations, but when a single pump can’t keep up with the inflow and the 2^nd pump is required to “assist”, this is where the unique set-up comes into play. When two pumps operate together with this unique piping arrangement, the two pumps pump in series (not parallel)!!

This system has the capability of overcoming the losses normally associated with long or undersized rising mains (without “forcing” the pumps to operate outside of acceptable operating areas of their performance curve). It is also a good choice if more than one pump station uses the same rising main.

Accurate Metering

With flow capabilities right down to 0.2 litres per hour, Rotho pumps, being positively driven by electric gear-motors, are ideal for chemical dosing/metering.

The most common environmental applications are for the pumping of Sodium Hypochlorite, Sodium Bisulphate, Ferric Chloride and some polymers, as well as lime slurry and carbon slurry.

Operator Safety

Rotho pumps are perhaps the safest of all peristaltic pumps to operate. Their retractable roller hose replacement and CIP system required very limited “hands – on”.

Also, because Rotho pumps do not have lubrication filled casings, working on the pumps is cleaner and safer. And with fast leak detection, leaks of the pumped media are detected quickly.

Ramparts iPC Integrated Controls

The Ramparts iPC pump has a plug & play “Integrated Pneumatic Control” system. This system allows operators to adjust suction stroke speed so that pump operation can be matched with the characteristics of the fluid being pumped as well as the individual suction characteristics of the application. Speed control of the discharge stroke also allows the pump to be “tuned” to the application.

No other power is required to drive the pump or any of its parts.

Ramparts Materials of Construction

Ramparts Diaphragm pumps are available with diaphragms and ball valves in the following materials:

Consult the Ramparts chemical resistance chart for specific chemicals.The following are the available materials for pump construction:

ETFE is a fluoropolymer (aka – Tefzel). It is the best lining material for chemical and abrasive resistance in acid and organic slurries.

Ramparts P Series Controls

An advanced DRC solid-state controller energises the Ramparts P Series’ solenoid valves to drive the pump’s suction and discharge strokes. The controller provides the following functions:

• Allows independent pressure adjustment of suction and discharge stroke (saving energy and lengthening diaphragm life)
• Allows cycle adjustment from 0-40 strokes per minute
• Allows 0-5 seconds discharge time
• Can run in manual or automatic [remote start/stop] modes
• Has an LCD stroke counter (totaliser)
• Liquid filled suction and discharge panel mounted pressure gauges
• Diaphragm failure alarm (optional)
• Ramp-Up filter press feed option – automatically follows the increasing pressure in a filter press (optional)
• Step-up filter press feed – increases the pump’s discharge pressure in four adjustable timed pressure steps (optional)
• Can be set up for duplex pump operation with sequential strokes (optional)

Using Gorman-Rupp self priming pumps can reduce WHS issues associated with pumping applications. Because pumps are located at “ground level”, high and dry above the wet well [not in it], pumps are easily accessed by operators for monitoring, maintenance or repair. Some of the identified risks that can be reduced or eliminated include:

• Working over water
• Working at heights
• Working with cranes
• Working with heavy swinging weights

Other OH&S issues can also be eliminated with the use of self primers. Unlike submersible pumps, self priming pumps do not need guide rails and discharge base elbows that will need service and replacement over the life of the installation, requiring confined spaces entry and the associated dangers. Submersible pumps also need chains to raise them to the surface. These chains can become corroded and weakened over time, creating a potential danger to operators lifting them.

The SCS system, combined with and above ground Gorman-Rupp pump station would be a revolution to any Water Authority or Council not currently using self priming pumps.

There would be no need for the following “accepted” operational “interventions”:-

• The use of sucker trucks for removing silt or fat build-up
• The use of chemicals to break up and remove fat deposits
• The use of well washers to clean off fat
• The use of baffles to direct flow away from pump suction inlet’s
• The replacement of discharge [duck-foot] bends. Because there is none.
• The replacement of submersible pump guide rails or lifting cranes. Because pumps are surface mounted.
• The use of cranes to lift pumps out of wet wells [because pumps are above ground].
• The use of 3 persons to attend site for a blockage removal [because only one person is needed to attend a self priming pump station].
• The use of specialised vehicles with lifting hoists.
• The use of 3 persons to perform routine maintenance such as oil changes, gauge checks, valve maintenance etc, because these tasks can safely be performed at a self priming pump station with only one person, and without the need for confined spaces access or the need to open wet well lids.
• The use of 3 persons and many hours to adjust pump clearances or change wear rings, as Gorman-Rupp above ground pumps only require one operator for less than 30 minutes to perform this task.

The Venturi Aeration system is the most efficient use of energy for transferring oxygen. The following are Standard Oxygen Transfer Rate [SOTR’s] for various mechanical aeration devices in kg/kW/hr:

• – Venturi Aerator 1.65  –  1.85
• – Surface aerator w/draft tube 0.73  –  1.27
• – Surface high speed 0.73  –  1.21
• – Submerged turbine 0.61  –  1.21
• – Submerged turbine/sparger 0.73  –  1.09
• – Surface brush and blade 0.48  –  1.09