500 series mid-flow process pumps. Watson-Marlow Pumps Group

520 series IP31 process pumps
Mid-flow peristaltic pumps specifically designed to meet the needs of biotech, pharmaceutical, scientific and process pumping by delivering unrivalled performance, accuracy and reliability.
520 IP66 washdown cased industrial pumps
IP66-rated pumps satisfy the requirements of the toughest processing industries providing unrivalled levels of accuracy, reliability and control for the harshest operating environments.
521 series close-coupled pumps
521 series close-coupled pumps are tough and compact, making them ideal for process and industrial applications, in general metering and dosing duties, particularly in water and waste treatment.

The 500 series is Watson-Marlow's top-selling pump range for applications from biotechnology to food processing and from contact lens monomer dosing to water and waste treatment.

Flow rates up to 3.5 litre/min
0.1 rpm to 220 rpm with speed accuracy to 0.1 rpm: 2,200:1 turndown
Manual control; remote auto and analogue control; RS232, RS485, Profibus
Intuitive, easy-to-use membrane keypad with large keys
Durable, corrosion-resistant case

LoadSure element models use three sizes of elements in a choice of four materials, offering three maximum pressures. Industrial or sanitary connectors are available. Continuous tubing models use tubing in sizes from 0.5mm to 9.6mm internal diameter, in a choice of eight materials.

Featuring sprung stainless steel rollers for high accuracy and gentle pumping. Low rotational speeds and a large swept volume greatly increase tube life and system reliability.

Highly resistant to acid, alkaline and solvent attack
Robust enough for the harshest environment
Durable track and rotor with no paint or surface treatments
Shatter-proof guard
Easy, fast tube loading

520 options include:

520 washdown cased pumps have NEMA 4X (IP66) protection for industrial and process applications
520 cased pumps have NEMA 2 (IP31) ingress protection for clean process and scientific applications
Close-coupled pumps are fitted with industrial electrical or pneumatic drives with inverter or mechanical variator control options
520Bp and 520BpN PROFIBUS cased pumps for direct connection to PROFIBUS DP networks. Available in NEMA 2 (IP31) and NEMA 4X (IP66) options.

The pumphead range includes LoadSure tube element options and continuous tubing and a wide choice of cased and close-coupled drives. Click on your chosen pumphead, below.

Pumphead options

REL LoadSure low-pressure pumphead

520REL LoadSure tube element pumphead offers up to 30 psi (2 bar) pressure and flow rates up to 3,500 ml/min.

Elements are available in Bioprene TL, Pumpsil, GORE STA-PURE PCS and GORE STA-PURE PFL with quick-release industrial connectors or world-standard ¾in PVDF sanitary connectors.
REM LoadSure medium-pressure pumphead

520REM LoadSure element pumphead offers up to 60 psi (4 bar) pressure and flow rates up to 1,500 ml/min.

Elements are available in Bioprene TM, GORE STA-PURE PCS and GORE STA-PURE PFL with quick-release industrial connectors or world-standard ¾in PVDF sanitary connectors.
REH LoadSure high-pressure pumphead

520REH LoadSure element pumphead offers up to 100 psi (7 bar) pressure and flow rates up to 1,500 ml/min.

Elements are available in Bioprene TH, Marprene TH and GORE STA-PURE PCS with quick-release industrial connectors or world-standard ¾in PVDF sanitary connectors.
R2 continuous tubing pumphead

The 520R2 pumphead is designed for continuous tubing with a wall thickness of 2.4mm. It offers up to 30 psi (2 bar) pressure and flow rates from 0.25 ml/min to 4.6 litres/min.

2.4mm wall tubing is avalable in five materials for almost any chemical requirement, in tube sizes from 0.5mm to 9.6mm internal diameter.
R continuous tubing pumphead

The 520R pumphead is designed for continuous tubing with a wall thickness of 1.6mm. It offers up to 30 psi (2 bar) pressure and flow rates from 0.25 ml/min to 3.0 litres/min.

1.6mm wall tubing is available in eight materials for almost any chemical requirement, in tube sizes from 0.5mm to 8.0mm internal diameter.