Choosing an industrial pumps flow control unit comes down to two immediate questions: which named configuration fits the process, and which condition category fits the job at hand? This group spans USD 255 to USD 1,100, with choices ranging from a new-open-box FRAME S industrial pump to used peristaltic models and a 520DU marked for parts or not working.
Quick take
The most straightforward split is by intended role. The Watson Marlow 730 Series 720RE Loadsure Head is the peristaltic option with stated maximum flow and RPM figures. The Masterflex I/P brushless pump provides the broadest operating description, including speed range, flow range, reversible operation, and I/P tubing sizes. The Watson Marlow 520DU is the clear repair-oriented choice because it cannot power on. The Process Pump & Seal FRAME S is the lowest-priced option and is centered on the FRAME S identifier rather than the peristaltic model references used by the others.
Listed-price comparison
| Option | Condition | Selection cue | Listed price | Price position |
|---|---|---|---|---|
| Watson Marlow 730 Series 720RE | Used | Peristaltic pump with Loadsure head, 2,000 liter/hour maximum flow rate and 360 maximum RPM | USD 399.95 | |
| Watson Marlow 520DU | For parts or not working | Peristaltic process pump identified as 520DU | USD 500.00 | |
| Process Pump & Seal FRAME S | New - Open box | Industrial pump identified by FRAME S MPN | USD 255.00 | |
| Masterflex I/P Millipore XX80EL000 | Used | Brushless peristaltic pump with 33-650 RPM range | USD 1,100.00 |
Decision matrix
- For a 720RE peristaltic configuration: focus on the Watson Marlow 730 Series unit, which pairs the 720re MPN with a Loadsure head.
- For a 520DU restoration or component project: the Watson Marlow 520DU is specifically identified as for parts or not working and cannot power on.
- For a FRAME S-specific requirement: the Process Pump & Seal unit is the direct match, with FRAME S shown as its MPN.
- For an I/P brushless configuration with detailed controls: the Masterflex I/P Millipore XX80EL000 has the most extensive operating description of the four.
Product notes
Watson Marlow Peristaltic Process Pump From 730du 730 Series 720RE Loadsure Head
This Watson Marlow unit fits a process selection driven by stated throughput and speed figures. Its maximum flow rate is 2,000 liter/hour, its maximum RPM is 360, and the title identifies a 730 Series 720RE Loadsure Head arrangement. The used condition makes it a different proposition from the new-open-box FRAME S unit, while the 720re MPN gives the configuration a clear reference point. Smooth movement is noted for the pump. Its concrete limitation is condition: it could use a general cleaning and is sold as-is. Choose it when the 720RE Loadsure-head format and the stated operating figures are central to the requirement.
Watson Marlow 520DU Peristaltic Process Pump
The Watson Marlow 520DU is the focused choice for a buyer seeking the 520DU model specifically for repair, parts, or a restoration-oriented project. It is clearly identified as a peristaltic process pump, but its condition is for parts or not working. The unit has moderate cosmetic wear, is missing its power inlet, and cannot power on. Those points are the key limitation as well as the deciding factor separating it from the operationally described 720RE and Masterflex choices. It also comes with no other accessories. Select the 520DU when the model reference matters and the work planned is consistent with a non-powered unit.
Process Pump & Seal FRAME S Industrial Pump FNOB
The Process Pump & Seal FRAME S Industrial Pump is the direct option when FRAME S is the identifier guiding the purchase. It is marked New - Open box and carries the lowest listed price in this comparison. That condition designation differentiates it from the used Watson Marlow and Millipore-branded units, while its industrial-pump title keeps the choice squarely in a flow-control context. Its limitation is the specificity of the FRAME S focus: it is a narrower match for a requirement keyed to that identifier than for shoppers comparing named 720RE, 520DU, or XX80EL000 configurations. Choose it for a FRAME S-centered selection rather than as a substitute based solely on price.
Masterflex I/P (Millipore XX80EL000) Brushless Process Pump, 33-650 RPM
The Masterflex I/P Millipore XX80EL000 is the choice for a process needing a detailed brushless peristaltic-pump specification. It has a 33-650 RPM speed range, a stated flow-rate range of 205 ml/min to 13 L/min, and an I/P pump head that accepts I/P 26, I/P 73, and I/P 82 tubing sizes. The three-turn potentiometer provides continuously adjustable speed from 5% to 100%, while the LED display shows speed in 1% resolution; the pump is also described as running in both directions. Its limitation is the used condition and its position at the highest listed price. The listed intended disciplines are biological and microbiological laboratory.
Final recommendation by use case
Choose the Watson Marlow 720RE when a 730 Series peristaltic setup with a Loadsure head is the target. Pick the Masterflex I/P when the decision depends on a brushless I/P configuration with detailed control and tubing information. Reserve the Watson Marlow 520DU for work centered on its non-powered, for-parts condition. Choose the Process Pump & Seal unit when FRAME S is the required identifier and its new-open-box condition is the preferred fit.
