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Watson-Marlow Bredel Series

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Watson-Marlow Bredel Series


The animation shows fluid being drawn into a pump, trapped between two shoes (in a Bredel pump) or rollers (in a Watson-Marlow pump), and finally being expelled from the pump. The gaps between the packets of fluid are shown only to help visualise the action.

The complete closure of the hose which is squeezed between a shoe and the track gives the pump its positive displacement action, preventing backflow and eliminating the need for check-valves when the pump is not running.

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Nothing but the hose or tube touches the fluid, eliminating the risk of the pump contaminating the fluid, or the fluid contaminating the pump.
Ideal for pumping shear-sensitive fluids, sludges, slurries, viscous fluids, aggressive acids and caustics.
Minimal set-up time, simple to operate.
Virtually maintenance-free: pumps have no expensive seals, check valves, diaphragms, or rotors to leak, clog, corrode, and replace.
Changing the pump over from one fluid to another takes only minutes and is as simple as changing the hose or tube.
Designed for continuous duty 24 hours a day, 7 days a week.
The yield is directly proportional to the pumps revolutions per minute and independent of the inlet pressure, discharge pressure, and the fluid viscosity. This results in superior flow rate stability and metering accuracy to 0.5%.
Low-pulse pumpheads for applications requiring smooth flows.
Pumphead design prevents backflow and siphoning without the need for ball check, backpressure, or foot valves.
Continuous dry-running and self-priming capability up to 30 feet (9 metres).
Reversible flow direction allows for easy draining of delivery lines and eliminates product waste or the need for flushing.
Wide range of tubing and hoses includes pharmaceutical and food-grade materials.
Hygienic design and Clean-in-Place (CIP) / Steam-in-Place (SIP) capability.
Long-life chemical resistant tubing and hose.
Rugged high-quality construction with 2- and 3-year warranties.

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Watson-Marlow Bredel's range of pumps meets the demands of processes across all industries from the heaviest of manufacturing duties to the most precise research task. Please refer to a Capabilities overview brochure or see the information for specific industries below.

Industry Applications
Agricultural Seed coating; dosing vaccines, vitamins and medication into the drinking water of animals; accurate diluting and dispensing animal semen.
Brewing Reliable, low-cost transfer and dosing yeast, finings and other additives. Please see Brewing brochure for details.
Ceramics Pumping abrasive ceramic slip, metering chemical additives. Elimination of airholes and metallic contaminants results in the minimisation of scrap. Please see Ceramics brochure for details.
Chemicals Accurate and repeatable metering of process fluids in paint pigments production;  precise metering photographic chemicals; transfer of a highly corrosive solution of zirconium and alcohol to miniature automotive light bulbs; pumping calcined kaolin clay without shear-induced thickening; transfer of an extremely corrosive high sulphur slurry.
Contact lenses Accurate and rapid monomer dosing; hydrating lenses for quality control checks; dosing solvent and polymer mix; dispensing saline and deionised water to finished lenses.
Engineering Transfer of a coating solution - a highly abrasive and toxic suspension of minerals, clay and catalytic agents - in the production of glass-coated steel plates or panels; condensate pumping systems; delivery of a consistent, volumetrically accurate samples. Please see Engineering brochure for details.
Food and Beverage Transfer of cider, soft fruit, potato slurry, batter, onion gravy, flavourings slurry, pie fillings, casseroles and stews, corrosive brine, abrasive thixotropic paste; high and low viscosity dressings containing a variety of particulates like mustard seeds, onion, chopped olives, rosemary, horseradish and peppers. Please see Food and beverage Brochure for details.
Mining Flocculants / reagent feed, cyanide metering, acid slurry and thick sludge transfer. Please see Mining Brochure for details.
Pharmaceuticals and biotechnology Dispensing anaesthetics sterilising agents, anthrax vaccine preparation, dispensing the copper sulphate for haemoglobin tests, metering acids, alkalis and antifoaming agents for fermenters, nutrient feed. Please see Pharmaceuticals Brochure for details.
Print and packaging Contamination-free transfer of varnishes, lacquers and glues, metering inks and coatings without foaming, pulsation or variation in flow. Please see  Print and packaging Brochure for details.
Pulp and paper Metering dyes, sizing agents, retention aids, optical brightening agents, phosphoric acid, soda ash and sodium nitrate solution; adding and transferring alum, latex, pulp chemicals, and acids and alkalis; pumping defoamer, recycling Composil, feeding polymer, re-circulating ink, and pumping titanium dioxide. Please see Pulp and paper Brochure for details.
Science and research Diverse applications requiring accuracy and sterility: from the transfer of ultra-pure concentrated acids needed to separate out rare earth elements to high precision dispensing of viscous nutrient media. Please see Pumps for Science brochure for details.
Water and waste treatment Metering and transferring polymers, ferric chloride, sodium hypochlorite, sodium bisulphite, lime slurry, hydrofluorosilisic acid, carbon slurry, potassium permanganate, aqueous ammonia, alum, sludge feed. Please see Water and waste treatment Brochure for details.

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Pumps Specification

Please click thumbnails below to view details, documentation and ordering information on specific pumps. You can also refer to a Pumps overview brochure for key figures and code description.

Pump Series Description Key Features
100 Series
Low flow single channel pumps. Fixed and manual / auto control variable speed. Flow rates from 1l/min to 53ml/min.
Rapid and simple tube loading.
Manual, auto and digital TTL control.
200 Series
Near pulseless, multi-channel cassette pumps with up to 32 channels. Flow rates from 0.6l/min to 22ml/min per channel.
Precise flow control for each individual channel.
Manual, auto and digital TTL control.
300 Series
Single or multi-channel benchtop pumps with manual, remote, analogue, RS232 control and accurate dispensing. Flow rates from 2l/min to 3 litre/min.
High visibility digital display with membrane keypad.
Single channel or up to ten separate channels.
Zero maintenance brushless DC motors.
New 323Dz general purpose dispensing pump.
400 Series
Ultra-compact scientific pumps for low flow single or multi-channel applications. Flow rates from 1l/min to 610 ml/min.
Precision multi-roller pumpheads for accurate flows.
Single channel 102R pumphead for use with Silicone or Marprene tubing.
Digital and analogue process signal control.
500 Series
Superb range of IP31 and IP66 rated pumps for science and industry as well as fixed and variable speed close-coupled pumps. Flow rates from 10l/min to 4.4 litre/min.
Manual, analogue and digital RS232/RS485 control.
ATEX rated, three phase and pneumatic drives.
Seven pumpheads options including low-pulse high accuracy 505L.
Dosing and dispensing pump for 0.5% accuracy.
600 Series
NEMA 4X mid-flow process pumps with full clean-in-place and steam-in-place capability. Flow rates from 0.0003 gpm to 4.8 gpm.
Manual, auto and digital control.
Close coupled pumps for the three phase operation including pneumatic and ATEX options.
One minute maintenance LoadSure elements.
700 Series
Industrial cased and baseplate mounted pumps for use with continuous tubing or new LoadSure elements. Three phase motors, ATEX rated drives or pneumatic. Flow rates from 0.4 gpm to 17.4 gpm.
Single or twin channel operation.
Driven roller pumphead extends tube life.
LoadSure elements ensure correct tube loading every time.
Fixed or variable speed drives.
800 Series
High-flow hygienic pumping using USP Class VI Bioprene tubing or STA-PURE tubing. Flow rates from 0.5 gpm to 35 gpm.
Full Clean-In-Place and Steam-In-Place capability.
Extensive motor/gearbox control options.

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Hoses and Tubing Specification

A hose or tubing is a key element of any peristaltic pump. Watson-Marlow Bredel pumps use either hoses which are reinforced against high pressure, or tubing which is unreinforced for lower pressure duties. Only Watson-Marlow tubing and Bredel hoses are to be used in Watson-Marlow Bredel pumps.


Constructed from high quality compounded rubbers, the hose is reinforced with four layers of braided nylon and finished by high precision machining. It is available with four different liner materials:

Hose Material Applications Product Temperature Colour Code
Natural rubber Always the first choice. A highly resilient material with excellent abrasion resistance and mechanical strength. Generally resistant to dilute acids and alcohols. From -20C to 80C
(-4F to 176F)
Buna N (NBR) Highly abrasion and wear resistant. Compatible with oils, fats, alkalines, and detergents. Suitable for a wide range of food applications. FDA, USDA and 3A approved. From -10C to 80C
(20F to 176F)
EPDM Excellent chemical resistance, especially to concentrated acids, ketones and alcohols. From -10C to 80C
(20F to 176F)
Hypalon Excellent chemical resistance. Recommended for strong oxidizing products like concentrated acids (nitric, sulphuric, chromic, hydrochloric etc.), alkaline liquids (sodium and potassium hydroxide) and oxygen generating substances such as hydrogen peroxide. Note: Pump speed may be limited with hypalon hose. From -10C to 80C
(20F to 176F)

Please also see:
Hosepump material compatibility chart
Chemical compatibility table
Your pump datasheet for hose ordering information.


Tube selection is initially based on the chemical compatibility of the material. Compatible tubing is then normally selected for the longest life, which will usually be Bioprene, Sta-Pure, or Marprene. Otherwise, silicone tubing is most often chosen for sizes up to 9.6mm (3/8"), and Neoprene tubing for bore sizes of 12.7mm (1/2") or more. Tube selection is also governed by the type of pumphead.

For maximum tube life, use a large bore tube at low speed. For maximum flow rate use the largest tube at maximum speed. For maximum accuracy, use a small bore tube at maximum speed. For maximum suction lift or pressure, use the smallest practicable bore size of tubing and run the pump at the slowest possible speed.

Tube Material Applications Product Temperature
Marprene Most often recommended tubing material. Highly resistant to oxidizing agents such as ozone, peroxides, and hypochlorite. Marprene is also opaque to both visible and ultra-violet light, and maintains low permeability to gases such as oxygen, carbon dioxide, and nitrogen. From 10C to 80C
(50F to  176F)
Bioprene Offers the same benefits as Marprene with the added feature of compliance with USP Class VI, FDA requirements 21 CFR 177.2600, and USDA standards for food handling. Both Bioprene and Marprene can be sterilized by autoclave, and repeated autoclaving will not affect overall life. Additionally Bioprene can be sterilized by ethylene oxide or gamma radiation. From 10C to 80C
(50F to  176F)
Silicone Standard laboratory tubing most used for smaller bore sizes to 3/8". This food and medical quality material meets USP Class VI standards and is autoclavable. Also available is platinum-cured silicone tubing for additional protection from contamination during the pumping process. Platinum-cured tubing has a smoother surface which means less protein binding. Ideal for medical device, chemical analysis, bulk active drug and pharmaceutical production applications, particularly where there is long-term contact with the process fluid. From -20C  to 80C
(-4F to 176F)
Neoprene Offers excellent performance in abrasive slurry and sustained pressure applications. This food quality tubing is most often utilized in bore sizes greater than 1/2". For most applications, Marprene tubing will be recommended instead of Neoprene. Black. From 0C to 80C
(32F to 176F)
Butyl Butyl can be useful in providing chemical resistance where Neoprene is unsuitable. Not food quality. Black. From 0C to 80C
(32F to 176F)
Fluorel Has been developed for chemical resistance to solvents, oils and strong acids. Expensive, but is sometimes the only chemically suitable material. Not food quality. Black. From -20C  to 80C
(-4F to 176F)
Chem.Sure Offers extraordinary chemical resistance, long life and very high burst pressures. USP VI and food grade approved making it suitable for foods and pharmaceuticals as well as aggressive chemicals. From -20C  to 80C
(-4F to 176F)
STA-PURE Has a unique composite construction for superior burst resistance compared to unreinforced silicone rubber and thermoplastic elastomers. Operates at pressures up to 7 bar (100psi), lasts 18 times longer than silicone tubing and virtually eliminates spallation. USP Class VI approved, non-toxic and autoclavable. From -20C  to 80C
(-4F to 176F)
Pumpsil Platinum-cured silicone tubing. Full bio-pharm certification USP Class VI, ISO10993, FDA regulations CFR 177.2600 for contact with food, USDA, 3A standards. Ultra-smooth bore to control protein binding and bacterial growth.  
Pumpsil-D High accuracy dispensing platinum-cured silicone tubing. Full bio-pharm certification USP Class VI, ISO10993, FDA regulations CFR 177.2600 for contact with food, USDA, 3A standards. Ultra-smooth bore to control protein binding and bacterial growth.  

Please also refer to:
Tubing selection guide
Chemical compatibility table
Your pump datasheet for tubing ordering information.

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