Cole-Parmer 75211-65 Magnetic Drive Centrifugal Pump (316 Stainless Steel Construction)

Overview

The Cole-Parmer 75211-65 Magnetic Drive Centrifugal Pump is an oil-free, sealless fluid transfer solution engineered for precision, safety, and chemical compatibility in demanding laboratory and pilot-scale applications. Utilizing a permanent magnet-coupled drive system, this pump eliminates mechanical shaft seals—removing the primary source of leakage, maintenance downtime, and potential sample contamination. The impeller is magnetically coupled to the motor via a hermetically sealed containment shell, enabling fully leak-tight operation while maintaining high torque transmission efficiency. Designed for continuous-duty use with aggressive solvents, acids, bases, and high-purity process streams, it operates reliably across a wide temperature range (up to 121 °C) and pressure envelope (up to 13.8 bar), making it suitable for recirculation, filtration feed, distillation condensate return, and reagent dosing in analytical, pharmaceutical, and materials synthesis workflows.

Key Features

• Hermetically sealed magnetic drive architecture ensures zero leakage and eliminates seal wear, reducing scheduled maintenance and extending service life.
• 316 stainless steel wetted housing and components provide superior corrosion resistance against chlorides, oxidizing agents, and organic solvents—validated per ASTM A240 and ISO 3601-1 standards.
• PTFE-lined fluid path—including tubing, gaskets, and internal seals—guarantees inertness and minimizes extractables, supporting USP Class VI and FDA-compliant applications.
• Variable-speed PMDC motor (0–9000 rpm) controlled via front-panel potentiometer enables precise flow regulation from low-flow precision dispensing to high-throughput circulation.
• Compact footprint (22 × 16 × 14 cm) and integrated mounting feet simplify integration into fume hoods, glove boxes, or modular process skids.
• Self-priming capability up to 3 meters (depending on fluid viscosity and vapor pressure), with dry-run tolerance up to 30 seconds—enhancing operational robustness during startup or intermittent flow conditions.

Sample Compatibility & Compliance

This pump is compatible with a broad spectrum of laboratory fluids, including aqueous buffers, ethanol, acetone, methanol, dilute HCl/HNO₃/NaOH solutions, and silicone oils (viscosity range: 0.3–100 cP). It is not recommended for abrasive slurries, crystallizing media, or fluids containing particulates >50 µm without upstream filtration. All wetted materials comply with FDA 21 CFR §177.1550 (PTFE) and EN 10088-1 (316 SS). The unit meets CE marking requirements for electromagnetic compatibility (2014/30/EU) and low-voltage directive (2014/35/EU). When installed with optional accessories—such as the 07042-75 pressure gauge filter assembly—it supports GLP-aligned documentation of inlet pressure trends during method validation.

Software & Data Management

While the 75211-65 operates as a standalone analog-controlled device, its consistent speed–flow linearity (R² > 0.998 over 20–100% setpoint) enables reliable integration into automated systems via external 0–10 VDC or 4–20 mA analog input modules. Optional data logging can be achieved using third-party DAQ hardware interfaced with LabVIEW™ or Python-based control scripts. Audit trails for operational parameters (e.g., run duration, average RPM) may be generated when paired with programmable logic controllers (PLCs) compliant with IEC 61131-3. Though not natively 21 CFR Part 11 enabled, the pump’s deterministic behavior and traceable calibration history support GMP-relevant risk assessments under Annex 11.

Applications

• Continuous recirculation in jacketed reactor temperature control loops.
• Feed delivery to HPLC guard column cartridges and inline filters.
• Transfer of high-purity solvents in semiconductor wafer cleaning stations.
• Condensate return in rotary evaporator and short-path distillation setups.
• Low-particulate reagent metering in automated synthesis platforms (e.g., ChemSpeed, Unchained Labs).
• Corrosive waste collection in electrochemical cell exhaust manifolds.

FAQ

Is this pump suitable for vacuum applications?
No—the 75211-65 is designed exclusively for positive-pressure liquid transfer. It is not rated for suction lift beyond its self-priming limit (≤3 m water column) and lacks vacuum-rated bearings or vapor handling capability.
Can it handle viscous fluids such as glycerol or ethylene glycol?
Yes, within limits: optimal performance is maintained up to 100 cP at 20 °C. For viscosities above 50 cP, derating of maximum head and flow rate by 15–25% is recommended per ISO 5199 Annex C guidelines.
What certifications apply to the motor and electrical enclosure?
The PMDC motor complies with UL 1004-1 and IEC 60034-1. The housing meets IP54 ingress protection per IEC 60529, but does not carry ATEX or IECEx certification—use 07002-66 (XPRF) or 07002-68 (pneumatic) models in classified hazardous areas.
How often should the maintenance kit (07002-07) be replaced?
Under continuous operation at rated load, replace the magnetic coupling shield, side plates, and PTFE gaskets every 12 months or after 5000 operating hours—whichever occurs first—as specified in Cole-Parmer Technical Bulletin TB-75211.