HNPM MZR-6305 / MZR-11508 Precision Micro-Gear Metering Pumps

Overview

The HNPM MZR-6305 and MZR-11508 are high-precision, positive displacement micro-gear metering pumps engineered for ultra-low-flow, high-viscosity fluid handling in regulated pharmaceutical and advanced materials manufacturing. Based on the fundamental principle of volumetric displacement via precision-machined ceramic or stainless-steel gear sets, these pumps deliver deterministic flow control across an exceptionally wide dynamic range—from 1 microliter per hour (1 µL/h) up to 1 liter per minute (1 L/min)—without requiring recalibration or flow compensation algorithms. Their design eliminates pulsation inherent in diaphragm or peristaltic systems, ensuring laminar, continuous delivery critical for microencapsulation, API synthesis, controlled-release formulation development, and lab-scale continuous manufacturing. As German-engineered instruments, they meet stringent mechanical stability and dimensional repeatability requirements essential for Good Manufacturing Practice (GMP) and Good Laboratory Practice (GLP) environments.

Key Features

• Precision micro-gear architecture with sub-micron gear tooth tolerances, enabling consistent volumetric displacement independent of backpressure (up to 10 bar typical, model-dependent)
• Integrated temperature-controlled housing (optional heating up to 120 °C), maintaining fluid rheology during delivery of thermosensitive or high-melt-viscosity encapsulants (e.g., PLGA, ethylcellulose, chitosan derivatives)
• Chemically inert wetted path: ceramic gears, PTFE-sealed stainless steel body, and optional sapphire bearings—compatible with aggressive solvents, acids, bases, and biopolymer solutions
• Direct-drive brushless DC motor with closed-loop speed control, supporting both analog (0–10 V / 4–20 mA) and digital (RS-485, Modbus RTU) interfaces for seamless integration into PLC- or SCADA-controlled process lines
• No external pulse dampeners or check valves required—self-priming capability and dry-run tolerance (limited duration) enhance system robustness and reduce footprint

Sample Compatibility & Compliance

These pumps are validated for use with fluids ranging from low-surface-tension solvents (e.g., dichloromethane, acetone) to non-Newtonian suspensions exceeding 100,000 mPa·s—such as polymeric microcapsule precursors, lipid nanoparticle dispersions, and peptide-loaded hydrogels. They comply with ISO 9001:2015 quality management standards and carry CE marking per EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. For pharmaceutical applications, their construction supports cleaning validation (CIP/SIP protocols), and documentation packages include material traceability (EN 10204 3.1), surface roughness reports (Ra ≤ 0.4 µm), and FAT/SAT test records. While not inherently 21 CFR Part 11 compliant, their digital interface enables integration with audit-trail-capable SCADA or MES platforms supporting electronic record integrity.

Software & Data Management

The MZR series operates natively via analog input or Modbus RTU protocol, allowing direct interfacing with LabVIEW, MATLAB, DeltaV, or Siemens SIMATIC controllers. Optional HNPM PumpControl software (Windows-based) provides real-time flow monitoring, multi-pump synchronization, batch logging (CSV export), and calibration curve management—including viscosity-correction tables derived from Newtonian reference fluids. All operational parameters (setpoint, actual RPM, temperature, run time) are timestamped and stored locally with configurable retention periods. When deployed within validated IT infrastructure, data logs satisfy ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) for regulatory submission.

Applications

• Microencapsulation of APIs, probiotics, flavors, and agrochemicals using interfacial polymerization or solvent evaporation techniques
• Continuous-flow synthesis of nanomedicines, including liposomes, polymeric nanoparticles, and micelles
• Precision dosing in hot-melt extrusion (HME) feed systems and twin-screw granulation processes
• Calibration fluid delivery in analytical instrument sample introduction (e.g., LC-MS, ICP-MS)
• Small-batch coating of gelatin or HPMC capsules with sealants, plasticizers, or enteric polymers (dosing volumes as low as 2–5 µL per capsule)

FAQ

What is the minimum measurable flow rate with guaranteed accuracy?
The MZR-6305 achieves ±1 % accuracy down to 1 µL/h when operated at reduced RPM with appropriate gear ratio selection and temperature stabilization.
Can these pumps handle abrasive suspensions or particle-laden formulations?
Yes—ceramic gear variants (standard on MZR-11508) demonstrate superior wear resistance against micronized APIs, silica, or TiO₂ suspensions; recommended maximum particle size is <5 µm.
Is validation support available for GMP-compliant installations?
HNPM provides IQ/OQ documentation templates, material certifications, and factory acceptance test reports; site-specific PQ must be performed by the end user per internal SOPs.
How does heating affect long-term pump performance?
Integrated heating maintains thermal equilibrium across the gear cavity, minimizing viscosity drift-induced flow deviation; thermal expansion is compensated by matched-coefficient housing design.
Are spare parts and service kits available globally?
Yes—HNPM maintains authorized service centers in North America, EMEA, and APAC; gear sets, seals, and motor modules are stocked with lead times under 10 business days.