HNPM MZR-2509 Ex ATEX-Certified Micro Annular Gear Pump
| Brand | HNPM |
|---|---|
| Origin | Germany |
| Model | MZR-2509 Ex |
| Flow Rate | 0.0015–7 mL/min |
| Speed Range | 1–4700 rpm |
| Viscosity Range | 0.3–5000 mPa·s |
| Precision (CV) | <1% |
| Displacement | 1.5 µL |
| Minimum Dose | 0.25 µL |
| Max. Differential Pressure | 0–5 bar (≥16 mPa·s) |
| Max. Inlet Pressure | 5 bar (10 bar with optional fluid seal module) |
| Wetted Materials | SS 316L, tungsten carbide, Ni-based alloy, graphite-reinforced PTFE, FPM (FKM), optional EPDM/FFPM |
| Motor | 24 V DC, 2 A, 53 W, encoder 500 ppr (HEDL 5540) |
| Cable Length | 10 m |
| Weight | ~2700 g |
| ATEX Certification | II 2G c T5 X |
| Installation Zone | Zone 1 & 2 |
| Operating Temperature | −5 to +40 °C |
Overview
The HNPM MZR-2509 Ex is a precision-engineered, ATEX-certified micro annular gear pump designed for safe, continuous, and discrete dosing of low-to-high viscosity liquids in potentially explosive atmospheres. Based on the proven principle of rotary positive displacement via a micro annular gear mechanism, it delivers highly reproducible volumetric flow without reliance on elastic tubing or compressible elements—eliminating pulsation-related inaccuracies common in peristaltic systems. Its compact footprint (<295 mm length, ~2.7 kg) integrates a certified explosion-proof DC motor (24 V DC, 53 W) and high-resolution optical encoder (500 pulses per revolution), enabling closed-loop speed control and traceable dose verification. Unlike conventional gear pumps, the MZR-2509 Ex employs wear-resistant ceramic components—including tungsten carbide gears and nickel-based alloy shafts—and chemically inert wetted materials (SS 316L, graphite-reinforced PTFE, FPM seals), ensuring long-term stability across aggressive solvents, oils, adhesives, gels, and low-lubricity media down to 0.3 mPa·s.
Key Features
- ATEX certification per Directive 94/9/EC (II 2G c T5 X), approved for use in Zone 1 and Zone 2 hazardous areas
- Volumetric accuracy with coefficient of variation (CV) <1% even at ultra-low flow rates (down to 0.0015 mL/min)
- True micro-dosing capability: 1.5 µL per revolution, minimum dispense volume of 0.25 µL
- Wide operational viscosity range: 0.3–5000 mPa·s—compatible with methanol, hydrocarbons, resins, silicones, and non-lubricating aqueous solutions
- Low-shear, low-pulsation delivery due to smooth annular gear kinematics—preserves shear-sensitive formulations
- Robust wetted path: SS 316L housing and rotors, tungsten carbide gearing, Ni-based alloy drive shaft, FPM primary seals (EPDM/FFPM optional)
- Integrated 24 V DC motor with feedback encoder supports precise speed regulation and audit-ready process logging
Sample Compatibility & Compliance
The MZR-2509 Ex is engineered for compatibility with chemically diverse process streams encountered in fine chemical synthesis, pharmaceutical intermediate handling, and functional coating formulation. Its wetted materials comply with FDA 21 CFR §177.2400 (for PTFE components) and EU Regulation (EC) No 1935/2004 for food-contact applications where applicable. The pump meets IEC 60079-0 and IEC 60079-31 standards for equipment protection by enclosure “nA” and construction safety for use in gas atmospheres (Group IIB, T5). It supports GLP/GMP-aligned operations through deterministic dosing behavior, mechanical traceability (encoder-based rotation counting), and absence of consumable tubing—reducing variability sources in regulated workflows.
Software & Data Management
While the MZR-2509 Ex operates as a standalone analog-controlled pump, its encoder output (quadrature signal, 500 ppr) enables seamless integration into PLC-based or PC-driven automation platforms (e.g., LabVIEW, TwinCAT, Siemens S7). When paired with compatible motion controllers or PID-enabled drivers, it supports time-stamped dose logging, batch record generation, and real-time flow monitoring. For FDA 21 CFR Part 11 compliance, system-level validation requires integration with electronic lab notebooks (ELNs) or MES platforms that enforce user authentication, audit trails, and electronic signatures—functions external to the pump but fully supported by its deterministic mechanical performance and encoder fidelity.
Applications
- Accurate metering of catalysts, initiators, and crosslinkers in continuous flow reactors under Class I Div 1 / Zone 1 conditions
- Dose-controlled dispensing of UV-curable adhesives and conductive inks in vacuum-assisted coating systems
- Stable feed of high-viscosity silicone oils and grease emulsions into precision filling stations
- Low-flow solvent delivery in automated sample preparation modules for GC/HPLC analysis
- Calibration fluid transfer in pressure and density standardization rigs requiring sub-microliter repeatability
- On-demand reagent injection in microfluidic synthesis platforms with intrinsic safety requirements
FAQ
Is the MZR-2509 Ex suitable for sterile or biopharmaceutical applications?
It is not designed for direct aseptic processing; however, its SS 316L wetted path and cleanable geometry support CIP/SIP-compatible system integration when validated per ISO 13408-1 and ASME BPE standards.
Can the pump handle abrasive slurries or particulates?
No—this is a precision gear pump intended for homogeneous liquids only. Suspended solids >10 µm may cause premature wear or seizure.
What is the maximum allowable backpressure at 5000 mPa·s viscosity?
Up to 5 bar differential pressure is permitted at viscosities ≥16 mPa·s; operation above this requires the optional fluid-seal module (rated to 10 bar inlet pressure).
Does HNPM provide calibration certificates traceable to national standards?
Yes—factory calibration reports (DIN EN ISO/IEC 17025-accredited laboratories) are available upon request, including flow vs. speed characterization across the full 1–4700 rpm range.
Is remote speed control possible via analog or digital interface?
Standard configuration includes 0–10 V analog speed input; RS-485 Modbus RTU and CANopen variants are available as OEM options.
