What are the primary benefits of a peristaltic pump like the 620S/R?

Peristaltic pumps offer contamination-free pumping as the fluid only contacts the tubing. They are also well-suited for viscous, abrasive, or shear-sensitive fluids and provide accurate, repeatable dosing.

Can this pump handle different types of fluids?

Yes, the fluid compatibility is primarily determined by the tubing material. With a range of tubing options, these pumps can handle various chemicals, food products, and biological solutions.

Is this unit suitable for continuous operation?

Yes, units in this series are designed for continuous duty in industrial settings. The brushless DC motor contributes to reliability and extended operational life.

What maintenance is typically required for a peristaltic pump?

Routine maintenance primarily involves replacing the peristaltic tubing, which is a wear part. The frequency depends on the application, fluid properties, and operating hours.

Are spare parts and tubing readily available for this model?

Watson Marlow is a well-established manufacturer, and tubing and spare parts for the 600 series are generally available through specialist suppliers.

used Equipment

Available

Verified seller

Watson Marlow - 620S Peristaltic Pump

Name: 620S Peristaltic Pump
Brand: Watson Marlow
SKU: 45289.SR4B
Availability: InStock

Price: Contact seller for price

This listing is for 1 of 7 Watson Marlow 620S/R Peristaltic Pumps

The units are in full working condition and ready for immediate use

Design & Functionality

The 620S/R model is part of the 600 Series of cased peristaltic pumps featuring a brushless DC motor equipped with digital keypad control (620S) and a sturdy NEMA 2 / IP31 vented, wipe‑down enclosure suited for dry industrial environments ,It operates at dual voltage (100–120 V or 200–240 V, 50/60 Hz) and includes features like MemoDose for one-shot dosing and wireless guard-switching for safety

The casing is chemically resistant, with powder-coated die-cast aluminium construction and an easy-to-clean membrane keypad

Pump Performance

Flow range: 0.00026 to ~4.23 gpm (equivalent to ~0.001 to 16 L/min) with the 620R pump head

With newer 620RE LoadSure heads, the flow increases up to ~4.76 gpm (0.004–18 L/min)

Pressure capability: Up to approximately 60 psi (4 bar) with the appropriate head and tubing

Control accuracy: Exceptional 2,650:1 turndown ratio, fine speed control from 0.1 to 265 rpm in selectable increments (0.1, 0.5, 1, 2, 5, or 10 rpm), with 0.1% speed accuracy

Pump Heads & Tubing

The model supports the following interchangeable pump heads:

620R Mk II (continuous tubing, two rollers)

620RE and 620RE4 (LoadSure elements, two or four rollers)

These heads are compatible with various tubing materials (e.g., Marprene™, Bioprene™, Sta‑Pure™, silicone) and sizes (typically 6.4 mm to 17 mm inner diameter)

The 620RE and RE4 heads feature retractable rollers for easier cleaning (CIP/SIP) and rapid loading

AFAB Lab Resources - Used Lab Equipment

Physical Attributes & Construction

Ingress Protection: IP31 (NEMA 2) for the standard 620S/R; there are IP66/NEMA 4X variants (e.g., 620SN/R) for environments requiring better dust and water resistance

Weight: Around 19.6 kg (with 620R/RE head) to 20.1 kg (with 620RE4)

Sound level: Less than 70 dB(A) at 1 m—relatively quiet for continuous industrial operation

Advanced Features

MemoDose: Delivers precise single-shot volumes—ideal for dosing applications

Ramp function & non‑drip: Ramp improves handling of delicate fluids, preventing splashes/frothing, while non-drip minimizes residual drips at dose end (noted in related Di versions but often included in feature suites)

Data export: Some models (e.g. 620S/RE) support RS‑232 export of batch records—important for GMP compliance

Cambridgeshire, United Kingdom

5,791 km away

Model Number

620S/R

Stock Number

45289.SR4B

Machinery Masters View

Typical context for this category of equipment. Always confirm specifics with the seller.

Applications & Use Cases

Accurate dosing and transfer of shear-sensitive or viscous fluids in laboratory and pilot plant settings.
Chemical metering and transfer, particularly for corrosive or abrasive liquids where pump integrity is critical.
Food and beverage processing for flavourings, additives, and delicate product transfer.
Pharmaceutical and biotechnology applications requiring sterile or hygienic fluid handling.
Water and wastewater treatment for chemical addition and sampling.

Typical Specifications

Typical Flow Range: For this class of equipment, flow rates commonly range from approximately 0.001 L/min up to 18 L/min, depending on the pump head and tubing configuration.
Pressure Capability: Units of this type typically handle pressures up to 4 bar (60 psi) with appropriate tubing and pump head selection.
Speed Control: Fine speed control is commonly available, often from 0.1 to 265 rpm, with high accuracy for precise dosing.
Power Supply: Typically designed for dual voltage operation, commonly 100-120 V or 200-240 V, 50/60 Hz, making them suitable for various industrial environments.
Pump Heads Supported: This model commonly supports interchangeable pump heads such as the 620R Mk II for continuous tubing and 620RE/620RE4 for LoadSure elements, offering flexibility in application.
Tubing Compatibility: Compatible with a range of tubing materials (e.g., Marprene, Bioprene, Sta-Pure, silicone) and inner diameters, typically from 6.4 mm to 17 mm.
Enclosure Rating: Units in this series commonly feature an IP31 or NEMA 2 rated enclosure, suitable for dry industrial environments.

Frequently Asked Questions

Peristaltic pumps offer contamination-free pumping as the fluid only contacts the tubing. They are also well-suited for viscous, abrasive, or shear-sensitive fluids and provide accurate, repeatable dosing.

Machinery Masters Intelligence. General guidance for this category of equipment only, not a substitute for the seller's exact specifications. Always confirm details with the seller.