Watson-Marlow Fluid Technology Group

- Hose Pump



APEX hose pumps: Flows to 6,200 litre/hour, 8bar. Dosing, metering, transfer. Optimised for process uptime. Engineered for a more competitive price/performance.

The newly expanded range of APEX hose pumps is ideal for aggressive and abrasive applications up to 8bar (116psi). With their seal-less, valve-less design, APEX pumps are engineered for a more competitive price/performance ratio vs high pressure hose pumps. Designed to suit all dosing, metering and transfer applications with unmatched flow stability from 2.8-6,200 l/hr, the APEX 10, 15, 20. 28 and 35mm pumps offer users these important benefits:

Seal-less, valve-less design

  • Affordable, accurate and reliable
  • Engineered for a more competitive price/performance
  • Reduced cost of ownership compared to other PD pumps

Increased process uptime

  • Precision machined hose elements for accurate, repeatable performance
  • Visual verification of correct hose loading
  • Optimised hose compression for unmatched flow stability

Long service intervals

  • The hose element is the only component to wear
  • Hose element can be replaced in-situ quickly and easily in minutes

Direct-coupled drive and maximum flexibility

  • No separate couplings to align or maintain
  • Ultra compact design with flexibility to mount standard gear motors
  • Rotor supported by own bearings to maximise gearbox life

Lower maintenance costs

  • More flow per revolution and long lasting hose elements
  • Single component change means fewer spare parts inventory
  • Shorter maintenance times compared to other pump types


The APEX pump range from Bredel has set the standard for lowering acquisition, operating and maintenance costs for low to medium pressure applications. Higher flows per revolution means APEX pumps can be run at lower speeds, increasing hose life and reducing wear. Compared with other pump types, APEX uptime periods are significantly longer.

APEX10, APEX15 and APEX20 pumps

  • One pump housing for easy conversion between three different size hose elements
  • Triple the flow without investing in a new pump
  • Achieve future-proofing for rising production volumes

 APEX28 and APEX35 pumps

  • New connector design without hose clamps enables hose change in minutes
  • Now just 8 bolts to change a hose

 Robust and compact

  • The APEX pump incorporates Bredel’s long proven direct-coupled technology, delivering the most reliable pump design in a compact footprint.  While the APEX gearbox mounts directly to the pump housing, the APEX pump rotor is supported by its own sealed bearing hub, isolating and protecting the gearbox from integral forces.


Pigment dosing in paper production

  • APEX10 hose pump replaces PC model
  • Stator and rotor wear now eliminated
  • Excessive downtime and maintenance a thing of the past

Paper mill installs APEX hose pumps for abrasive pigment dosing

The Beetham, Cumbria plant of BillerudKorsnäs has replaced a progressive cavity (PC) pump with APEX10 hose pump technology from Watson-Marlow Fluid Technology Group on an application dosing abrasive pigment in kraft paper manufacture. The move has solved the problem of stator and rotor wear on the PC pump that was leading to a drop in performance, downtime, and the need for regular maintenance.

Abrasive pigment

“We put the pigment into the stock preparation end of the paper machine to introduce a colour shade to certain grades,” explains Engineering Manager Tony Halhead. “We dose very low, precise volumes as the shade is critical. However, the abrasive nature of the pigment was causing the stators and rotors in our 1” PC pump to wear, leading to a drop in performance.” As a result, the engineering team at Beetham would have to speed up the three-phase inverter in the control box to maintain flow rates at the required levels, causing even faster wearing. However, if the drop in performance went unnoticed, it could lead to a variation in shade and to rejected paper. On a long production run this could be very expensive.

“We were experiencing dips in performance on a regular basis so we decided to address the situation, particularly when also considering the downtime and maintenance issues,” says Mr Halhead. “Other Watson-Marlow pumps were being used on site successfully so we thought they would be a natural first port of call.”

Uptime and continuity

Watson-Marlow recommended the use of an APEX10 hose pump. APEX pumps are engineered for maximum uptime and process continuity. Through design attributes such as heat dissipation, precision machined hose elements and optimised hose compression, APEX pumps reduce hose element fatigue compared to other hose pumps and when a hose replacement is required, this is a quick task which can be carried out in-situ by maintenance staff.  The benefit for APEX users such as BillerudKorsnäs is reduced maintenance intervals, leading to decreased cost of ownership. Operating and inventory costs are also less, as a single hose element is all that needs to be replaced. 

Reliable performance

“Since installation the APEX10 pumps have been running reliably in a 24/7 operation,” says Mr Halhead. “We are now considering the replacement of other PC pumps on site with APEX models.”


Lime slurry dosing and high solids, lead-based slurry transfer

  • Tough process conditions with flows up to 2500 litre/hour
  • Hose replacement not expected before 14 months running is complete

Bredel APEX35 hose pumps improve quality and reduce maintenance costs

The New Braunfels, Texas plant of the Canyon Regional Water Authority is keen on sourcing an alternative to its progressive cavity (PC) pump to increase the accuracy of pH control. The potable water plant currently controls pH by dosing lime slurry using a PC pump, which runs for approximately 12-16 hours a day at a rate of 900 litre/hour.

 Reliable, consistent flow

Watson-Marlow has supplied a Bredel APEX35 hose pump to the New Braunfels CRWA plant so that engineers can see the benefits of using a hose pump to handle the lime slurry. First of all, insufficient flow consistency of the PC pump is prone to causing fluctuations in the pH control, which means variations in water quality. Installation of the APEX35 hose pump with its stable and consistent flow means that these problems have already been eliminated.

Another huge practical advantage of this new hose pump at the site is reduction in maintenance. The abrasive nature of the lime slurry means that maintenance is required on the PC pump every three months and takes up to five hours to complete. Furthermore, this often requires expensive consumables such as stators, rotors or linings. In contrast, the APEX35 pump has required no maintenance in its first six months of operation at CRWA, and when maintenance is finally required, it will take no more than 30 minutes, with the only consumable part being a single hose element.

Direct comparison

The outstanding success of the CRWA APEX pump trial was replicated at the plant of Addenda Corporation, which is in the process of comparing its existing hose pump to a new Bredel APEX35. Here the task involves the accurate transfer of a very abrasive, high solids, lead-based slurry between process stages. The existing hose pump and the APEX35 are being run under exactly the same process conditions, with flow at approximately 2500 litre/hour.

The company’s existing pump requires hose replacement every 8-9 months; a very acceptable and cost effective uptime period. The APEX35 pumps' hose replacement significantly is not expected before 14 months running is complete. This is thanks largely to the APEX design, which is optimised for medium pressure applications and long lasting hose elements, and increase it pump uptime arrives as a consequence of selecting the right pump for the application.

Advantages to customers handling abrasives

When handling abrasive substances, a major advantage of APEX hose pumps is that they have no costly wearing components like seals, valves, membranes, stators, rotors or glands to maintain. Self-priming, dry running, and with no internal valves, hose pump technology also helps users improve their processes by eliminating troublesome ancillary items like anti-siphon valves, back-pressure valves, degassing valves or run-dry protection. Consequently, APEX hose pumps are perfectly suited for transfer and metering abrasive, corrosive, viscous, shear-sensitive, gaseous, crystallising fluids, or even fluids with a combination of these properties.

Designed for longevity

Another important factor in being able to reduce maintenance costs at Addenda is that the APEX35 requires 18% less hose compressions for the same volume transferred by the existing hose pump (which needs around 1500 strokes for each 1000 litres). What’s more, the direct coupled technology and self-supporting rotor on the APEX35 help maximise gearbox and bearing life to further add to the package of savings for the plant.


Abrasive brine causes progressive cavity pump problems

  • Progressive cavity pump stator or rotor replaced every month. APEX35 still running after 6 months
  • Minimum 4 hours pc pump repair time v 20 minutes APEX35 hose installation

New Bredel APEX35 hose pump cuts maintenance costs at ‘energy from waste’ plant

The trial of a new APEX35 hose pump from Watson-Marlow Fluid Technology Group at EEW Saarbrücken GmbH, a producer of energy from waste, has indicated the significant potential savings in pump maintenance costs. Not only is the APEX35 pump able to run without clogging, for a much longer period when pumping abrasive brine at EEW, but downtime and the cost of replacement parts is reduced greatly.

EEW Saarbrücken GmbH, MHKW Pirmasens operates a waste-heat power plant in Pirmasens, Germany. Each year the facility recycles around 180,000 tons of waste, generating around 75,000 MWh of electricity (enough for 20,000 households) as well as 25,000 MWh of district heating (enough for 2000 households). These figures also allow some 52 million litres of heating oil to be saved in energy production every year.

Abrasive slurry

Among the site’s operations is the separation of crystalline sodium chloride from its highly concentrated solution in the process water before disposal. Here, a special centrifuge is used as a thickener to separate the solution from the abrasive salt slurry (density 2.16 kg/l), which is called brine or ‘solebrei’.

EEW has been using a progressive cavity pump to feed the centrifuge (flooded suction, 1 bar back pressure), for approximately 1.5 hours every 3-4 hours in a 24/7 operation. However, the abrasive nature of the brine demanded the repair of the pc pump stator or rotor every month, along with occasional replacement of the linings. Furthermore, not only would it take a minimum of four hours to perform the repairs (using expensive replacement consumables), but the pump would also have to be removed from the process line.

Dissatisfied with the situation, plant engineers at EEW requested a trial of the new Bredel APEX35 hose pump. This model was selected because it was thought to offer the greatest potential maintenance savings in this abrasive handling, intermittent duty application. The results were nothing short of impressive.

Outstanding results

During the first six months of the trial, the APEX35 required no maintenance whatsoever. Additionally, as the only wear part in APEX pumps is the hose, this could be replaced quickly (20 minutes) and easily without removing it from the process line. Considering that a replacement stator alone for the progressive cavity pump is thought to cost around €1500, the projected payback period for the APEX35 hose pump is extremely short. In addition, there is the saving in inventory as only the hose will need to be kept in stock.


Abrasive core wash slurry transfer

  • AOD pump needed two weekly maintenance v APEX35 ten weeks uptime
  • APEX35 maintenance less than 50% of the time to return AOD pump to operating condition

A new APEX35 hose pump from Watson-Marlow Fluid Technology Group is proving that it can deliver significantly reduced maintenance requirements at the world’s largest manufacturer of freight carriage components, Amsted Rail. Put to the test in a process-critical abrasive slurry transfer operation, the trial has demonstrated that in comparison with existing air operated diaphragm pumps, the Bredel APEX35 can extend the time between scheduled maintenance intervals dramatically at this important producer of rail side frames and bolsters.

Scott Schuette, Amsted Rail’s Engineering Manager had worked with Bredel hose pumps in the past at Elementis Pigments, and brought his confidence in the technology to Amsted Rail.

New pump offers cost savings

Kurt Krummrich, Industrial Sales Manager at Watson-Marlow Pumps Group explains, “Amsted Rail has used air-operated diaphragm [AOD] pumps in this particular process for many years. Scott's willingness to try something new, coupled with our discussion that maintenance cost savings could be achieved by installing the new APEX35, got our foot in the door.”

Perfectly suited to abrasive handling

When handling abrasive substances such as the core wash slurry, a major advantage of APEX hose pumps is that they have no costly wearing components like seals, valves, membranes, stators, rotors or glands to maintain. The pumps are also self-priming and dry running.

Significantly reduced maintenance costs

The Bredel APEX35 hose pump replaced an AOD pump on one of the dip tanks, running with flooded suction and virtually no pressure. While the AOD pumps need to be maintained every two weeks, the APEX35 hose pump ran continuously for ten weeks before any maintenance was carried out.In addition to the significantly longer uptime periods, when maintenance of the APEX pump is required, additional savings are apparent as it takes less than 50% of the time needed to reinstate the AOD pump to operating condition, with only a single replacement part required – the precision machined hose element.

Energy cost savings

Although the AOD pumps have been in use for many years, Mr Schuette's aims for the future are to choose pumps that not only reduce maintenance and downtime, but also that do not require compressed air for their operation.

In conclusion

The benefits of the APEX pumps' increased uptime and process continuity at Amsted Rail are clear, and the company can look forward to substantial savings in labour and parts, with a greatly decreased cost of ownership.

  • There is no contamination of the pump or fluid
  • Ideal for slurries, viscous, shear-sensitive and aggressive fluids
  • Easy to install, simple to operate, inexpensive to maintain.
  • Pump design prevents backflow and syphoning without valves

The peristaltic pumping action of APEX works by alternately compressing and relaxing a machined hose between the pump housing and the rotor, ensuring optimal compression. The fluid ahead of the rotor is pushed towards the discharge while the rebounding hose behind the rotor draws more fluid in. There are no seals, seats or valves in the flow path and the fluid contacts only the inner wall of the hose.

Maintenance consists of replacing a single hose element, a task that can be performed in minutes.

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