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Product category: Peristaltic Pumps
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620S Peristaltic Pump by Watson Marlow is a used peristaltic pumps listing available on Machinery Masters. Browse specifications, request seller details, and find similar equipment on Machinery Masters.
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Watson Marlow - 620S Peristaltic Pump
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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 Kingdom5,791 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.