500 series close-coupled pumps
Liquid handling (pumps and systems)
Industrial equipment
Industrial close-coupled peristaltic pumps designed for reliable transfer of aggressive, abrasive, and viscous fluids. Deliver flow rates from 2.6 to 4,600 ml/min, operating pressures of up to 7 bar, and IP55 environmental protection.
500 series close-coupled pumps
About the Product
Watson-Marlow 500 Series Close-Coupled Pumps combine the pumphead and electric motor into a single compact assembly, providing a reliable and low-maintenance solution for continuous industrial fluid handling. The close-coupled design minimizes installation space while improving durability and simplifying maintenance in demanding process environments.
The range includes 520R and 520R2 pumpheads for continuous tubing, together with 520REL, 520REM, and 520REH pumpheads for LoadSure® tubing elements designed for low-, medium-, and high-pressure applications. For hazardous environments, 501RLA and 501RL2A ATEX-certified pumphead options are also available.
A spring-loaded rotor with large-diameter rollers provides smooth tubing compression, reducing tubing fatigue while maintaining highly accurate and repeatable flow rates. Pumphead components manufactured from chemically resistant PPS, together with stainless steel rollers and bearings, ensure long service life when handling aggressive chemicals and abrasive slurries.
The series is available in fixed-speed, integrated inverter, and external inverter drive configurations, allowing users to select the most suitable control method for their application. With high performance, industrial durability, and compact construction, the 500 Series is widely used in chemical processing, mining, water treatment, food production, and many other industrial sectors.
Mining Industry
Transfer of abrasive slurries, process chemicals, and mineral processing reagents.
Chemical Processing
Accurate dosing and transfer of aggressive chemicals, acids, and process reagents.
Food and Beverage Production
Pumping viscous food ingredients, additives, and process fluids.
Water and Wastewater Treatment
Metering coagulants, flocculants, disinfectants, and other treatment chemicals.
Applications
500 series close-coupled pumps
Flow Rates up to 4,600 ml/min
Operating Pressure up to 7 Bar
Extended Tubing Life
Excellent Chemical and Abrasion Resistance
Industrial Reliability
Flexible Drive Options
500 series close-coupled pumps
Specifications
Flow Range
2.6–4,600 ml/min
2.6–4,600 ml/min
Maximum Operating Pressure
Up to 7 bar
Up to 7 bar
Speed Range
60–291 rpm
60–291 rpm
Drive Options
Fixed speed, integrated inverter, external inverter
Fixed speed, integrated inverter, external inverter
Pumphead Types
520R, 520R2, 520REL, 520REM, 520REH, 501RLA, 501RL2A
520R, 520R2, 520REL, 520REM, 520REH, 501RLA, 501RL2A
Tubing Type
Continuous tubing and LoadSure® tubing elements
Continuous tubing and LoadSure® tubing elements
Protection Rating
IP55
IP55
Fluid Temperature
–20 to +80 °C (up to +65 °C for ATEX versions)
–20 to +80 °C (up to +65 °C for ATEX versions)
Power Supply
400 V, 50 Hz, 3-phase
400 V, 50 Hz, 3-phase
Weight
10–20 kg
10–20 kg
Additional Resources
Operating Manuals
Specifications
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