The Vaughan name is widely becoming accepted as the ultimate solution for solving difficult solids handling pumping problems in both municipal and industrial processing environments. The newly introduced self-priming range utilises the same proven and patented design of other Vaughan chopper pumps with a hardened impeller, cutter bar and upper cutter which allows the pump to chop and pump solids laden waste material without the risk of clogging.

Pump Systems Ltd have recently supplied a Vaughan self-priming chopper pump to a large New Zealand wine company for pumping wastewater from an underground tank where solids material such as leaves, wine bottle tops, pieces of string, plastic caps and strapping caused clogging problems for the existing pumps. Installation of the Vaughan pump meant that existing suction screens could be removed, which have only caused problems in the past by getting clogged or “blanketed” with leaves and other debris.

Vaughan self-priming chopper pumps are available in four sizes with suctions and discharges up to 250mm. They are ideally suited for applications in all types of processing industries and local authority wastewater treatment plants where traditional submersible and surface pumps in pump stations suffer continual clogging problems and pipework blockages. Using a Vaughan self-priming chopper pump will allow for solids in the waste stream such as rag, rope, gloves, mop heads, bags, spoons, cardboard, wire, wood, metal strapping, meat wastes, offal, vegetables, chicken and turkey feathers, fish waste, scum and sludge to be handled with ease.

For more information on Vaughan Chopper Pumps please click here.

The Vaughan Rotamix Tank Mixing System is today’s most cost effective means of mechanical mixing available for digesters, sludge storage and other high-volume applications. Since the conception of Rotamix over 8 years ago by Vaughan Co., USA, there are now over 550 systems operating worldwide in a wide range of municipal and industrial applications.
Looking after Vaughan and Rotamix sales for Australasia, Pump Systems Ltd have extensive experience in this area with Rotamix systems operating throughout New Zealand and Australia, as well as in Singapore.

The Rotamix system comprises of fixed nozzle assemblies that are mounted inside the tank to factory specified angles and are permanently tightened. No additional adjustment is required. The nozzles are constructed in ductile cast iron and are glass lined for abrasion resistance and reduced friction. The entire assemblies are then white metal sandblasted and powder coated to provide superior surface protection. Each nozzle mixing assembly comes with a 10-year full replacement warranty for wear and corrosion. There are no moving or rotating parts within the process and no scheduled nozzle assembly maintenance is required.

The unique mixing flow pattern created by Rotamix eliminates dead spots, reduces energy requirements and prevents against the formation of scum mats and solids settling inside the tank. The Rotamix system uses an externally mounted Vaughan Chopper Pump to recirculate and precondition the contents of the tank. The Vaughan Chopper Pump will handle solids laden material and sludge containing rags, fibres and hair. This virtually eliminates problems with fibrous material and other debris reweaving into clumps, while ensuring the pumps and nozzles remain clog-free.

When compared to conventional mixing systems, the Rotamix System can save the end user up to 60% in combined capital, operation and maintenance costs. With the ability to operate intermittently, even when mixing tanks after periods of storage, overall energy costs are significantly reduced. Depending on the process and layout of tanks, it is even possible to fill, mix and transfer multiple tanks using only one pump. The Rotamix system easily retrofits into existing tanks. All Rotamix systems come with a Mixing Performance Guarantee, where Vaughan Co. provide complete mixing system responsibility.

Having represented Vaughan Co. for the past 16 years, Pump Systems Ltd is pleased to be able to offer its clients world-class support and technical assistance. With their expertise in solving difficult solids handling problems and other challenging pumping applications, Pump Systems Ltd is perfectly positioned to offer leading solutions for today’s modern waste management processes.

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With over 450 Rotamix installations worldwide, Vaughan Company have now taken mixing to the next level. This new concept named Ro2mix, combines existing proven Rotamix nozzle mixing technology with the use of aeration. The end result: Hydraulic mixing with minimal aeration requirements.

Vaughan’s success in providing even distribution of solids using dual-zone rotation has allowed them to further enhance this highly efficient mixing system by providing excellent oxygen dispersion in a homogeneously mixed tank. All while providing complete process flexibility and reduced energy costs.

Features & Benefits

- Ability to handle higher solids concentrations
- Significant reductions in required aeration
- Proven design for both odor control and biological demands
- Diffuser quantities significantly reduced
- Ability to handle higher concentrations can reduce total number of tanks required
- Process flexibility with intermittent aeration and mixing as required

Applications

- Aerobic Digestion
- Storm water holding tanks
- Sludge holding tanks
- Assistance in mixing existing secondary treatment to prevent deposition issues

Design Options

- Disc diffusers
- Aspirating inline injectors
- Wall-mounted mechanical aerators

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It is with great sadness we announce, that after a long illness, Alastair McLachlan, one of the founding Directors of Pump Systems Ltd, passed away peacefully on the 14 August 2009.

Since Pump Systems Ltd was formed in 1984, Alastair was responsible for all engineering aspects of the company’s activities, ranging from large-scale pump system design, to testing and repair work. He was responsible for the successful completion of a wide range of projects throughout New Zealand and Australia.

Alastair’s engineering and technical expertise was an invaluable asset to the company and this along with his experience and much sought-after advice, will be greatly missed.

To his wife, Helen and family, we express all of our support for the future.

Four model HCD 055 screw impeller centrifugal pumps have recently been supplied to a customer who requires pumps with the ability to transfer water containing fine soft solids. The key to their process is to obtain a flow rate with a gentle low shear pumping action to preserve the original features of the transferred media. The special shape of the HCD screw impeller enables the centrifugal pump to transfer solids without any damage to the product and without the risk of clogging the pump.

Manufactured by Tecnicapompe (Italy), the HCD and ZCD screw impeller centrifugal pump is available in many different sizes and versions for flow rates up to 1,400 m3/h and heads up to 30 metres. The pump will handle solids up to a maximum size 100 mm and will withstand operating temperatures up to 120 degrees Celsius. These innovative screw impeller centrifugal pumps can be used with a wide variety of thick products up to 1000 centipoise or with products that have solid particles in suspension of up to 60% solids and 40% water.

Tecnicapompe centrifugal screw impeller pumps are supplied in either polished 316 stainless steel materials for food related applications or in 304 stainless steel. There are a range of mechanical seal options available as well as connection fittings that make these pumps ideally suited to a wide range of industrial and food processing applications.

The HCD and ZCD centrifugal pump has a long history of pumping delicate green and black olives in Spain, Greece, Turkey and Italy. Other products include fruit, whole vegetables such as onions, potatoes, peas, beans, mushrooms, carrots, cucumbers, peppers, sauces like Italian pesto, boiled poultry meat, tomato sauce, cheese curd, juice concentrates, winery must, tallow and dairy products. The largest version of the ZCD centrifugal pump can even transfer live fish up to 40 cm long and 1 kg in weight without damage.

Ongoing clogging problems with existing pumps at a large wastewater treatment plant in Sydney, Australia has lead to the supply of two Vaughan Self Priming Chopper Pumps. The wastewater treatment plant has been struggling to overcome problems due to pumps and pipework clogging with clumps of rag and ropey fibrous lengths of rag and hair etc.

The existing pumps are being replaced with two model SP4K heavy duty Vaughan Self Priming Chopper Pumps. Vaughan use a patented and innovative design of hardened impeller, cutter bar and upper cutter which allows the pump to chop and pump solids laden waste material without the risk of clogging. The clearances inside the pumps can be adjusted externally for ease of servicing and these particular pumps have been supplied with special ceramic-coated casings to resist wear from suspended grit in the wastewater.

Vaughan Self Priming Chopper Pumps are now operating throughout a wide range of industries in New Zealand and Australia. They are ideally suited for applications in all types of processing industries, local authority wastewater treatment plants and pump stations where traditional submersible style wastewater pumps suffer clogging problems. Typical applications include pumping solids laden wastewater, storm water and sewage from waste streams containing solids such as rags, rope, gloves, mop heads, plastic lids, bags, spoons, strapping, cardboard, wire, metal strapping, meat wastes, offal, vegetables, chicken wastes, fish wastes, scum and sludge, to name a few.

For more information on Vaughan Chopper Pumps please click here.

Innovative thinking and 40 years experience in the municipal and industrial wastewater sector lead Lackeby Products from Sweden to develop their unique VSV sludge/water heat exchanger. The VSV heat exchanger can also be used for sludge to sludge heating applications using two units with closed circuit water loop and pump. The all stainless steel, insulated, high performance heat exchanger has been developed to meet special requirements for the heating or cooling of sludge in wastewater treatment plants. The unique patented design provides a compact heat exchanger with minimal maintenance needs and low running costs, making a heat exchanger unit from Lackeby Products a good investment.

The VSV heat exchanger channels provide a large throughput area that keeps pressure loss low and minimises the risk of clogging. Each level of sludge channels is surrounded by a rectangular water circuit, in which water for heating/cooling flows in the opposite direction to the sludge. The unique patented open turning chambers at each end contribute to a very compact design of heat exchanger that is simple to install. Inspection, disassembly and maintenance are made easy because the turning chambers are mounted on a common flanged assembly which also allows for ease of servicing if required. The innovative turning chambers provide even higher heat transfer by equalising the sludge’s temperature profile, delivering low running costs and higher energy efficiency.

A recent project involved the supply of several large Lackeby heat exchanger units to a wastewater treatment plant in Christchurch for sludge. Current ongoing projects include the upgrades of two large wastewater treatment plants in Australia.

Installation of a Lackeby heat exchanger will provide the end user with many process benefits including; an enhanced efficiency of digestion and hygenisation, equilisation of the sludge’s temperature profile, easy maintenance and elimanation of problems with multiple flanges and loose connections, minimises installation volume, reduces pressure losses, minimises risks of clogging and eliminates the risk of sludge contamination.

For more information on Lackeby Sludge Heat Exchangers please click here.

Pump Systems have recently supplied a custom built Micropump to a large chemical manufacturing company in New Zealand for pumping Peroxymonosulfuric Acid, better know as Caro’s Acid, which is a corrosive, hazardous and highly reactive chemical.

The requirement was for a pump to produce flows ranging from 4 to 10 L/min at a differential pressure of 2.5 bar. To achieve this, a Series 5500 Micropump was selected and due to the volatile nature of the liquid, would need to be run at very slow speeds ranging from 400 to 800rpm.

The body of the pump was to be constructed in Hastelloy C-276 material, which is extremely hard and offers excellent corrosion resistance to Sulfuric Acid and Hydrogen Peroxide, both of which make up part of the preparation. The gears and all static seals were in PTFE (Teflon) meterial.

As the exclusive distributor for Micropump in New Zealand, Pump Systems are able to offer clients state-of-the-art technology from a market leader in sealless, low-flow gear pumps for precise fluid control.

For more information on Micropump Magnetically Driven Gear Pumps please click here.

Pump Systems recently supplied a Vaughan Vertical Wet Well Chopper Pump to a large processing company in the North Island of New Zealand for pumping sheep casings and other process wastes including Mucosa, slime, threads and intestines. The Vertical Wet Well design is Vaughan’s most popular sump pump with sizes available from 3” up to 12” and capacities from 20 m3/hr up to 1800 m3/hr.

Material of this nature is notoriously difficult to pump, as most pumps will not cope due to clogging and binding of impellers and shafts. This is where a Vaughan Chopper Pump stands out from the rest with its patented chopping action and robust construction for use in heavy-duty solids handling applications.

The unique configuration of a Vaughan Chopper Pump consists of three main parts; the Cutter Bar, Impeller and Upper Cutter, which are all hardened to 60 Rockwell C for wear and impact resistance. The sharpened vanes on the Impeller meet with the arms on the Cutter Bar to effectively chop material as it enters the suction. To prevent stringy material from wrapping behind the Impeller, which is particularly important when pumping casings, the Upper Cutter is finely positioned with minimum clearances to shred and remove any stray solids that enter the mechanical seal area.

One of the main advantages of using a Vaughan Chopper Pump apart from its ability to pump difficult to handle solids is that potential blockages and plugging in the piping system are eliminated because the material is preconditioned and broken down.

To view further information on Vaughan Chopper Pumps please click here