HNPM MZR-6359 Ex Intrinsically Safe Micro Annular Gear Pump

Overview

The HNPM MZR-6359 Ex is a certified intrinsically safe micro annular gear pump engineered for precise, pulse-free, low-shear fluid metering in hazardous environments. Unlike peristaltic or diaphragm pumps, it operates on rotary positive displacement principle—utilizing a precision-machined micro annular gear rotor housed within a toroidal cavity—to deliver exceptional volumetric accuracy and long-term stability. Its hermetically sealed magnetic coupling (NdFeB) eliminates dynamic seals, preventing leakage and enabling continuous operation with aggressive, corrosive, or high-purity process fluids. Designed specifically for Zone 1 and Zone 2 explosive atmospheres, the MZR-6359 Ex complies fully with ATEX Directive 94/9/EC (now recast as 2014/34/EU) and carries CE marking under II 2G IIC c T4 X classification, indicating suitability for gases including hydrogen, acetylene, and ethylene-group mixtures at surface temperatures ≤135 °C.

Key Features

• Intrinsically safe design certified to ATEX II 2G IIC c T4 X for use in explosive gas atmospheres (IECEx compliant equivalent available upon request)
• Micro annular gear architecture delivering ultra-low pulsation (<0.5% peak-to-peak amplitude) and minimal shear stress—critical for shear-sensitive formulations such as polymer emulsions, biological suspensions, and nanodispersions
• Chemically inert wetted path constructed from Alloy C22 (DIN 2.4602), sintered silicon carbide (SSiC) shaft and bearings, alumina (Al₂O₃) bearing housings, and zirconia (ZrO₂) rotor—resistant to halogenated solvents, strong acids (e.g., aqua regia), oxidizers, and molten salts
• High-precision dosing capability: coefficient of variation (CV) <1% across full flow range; minimum dispense volume of 15 µL; displacement per revolution: 24 µL
• DC brushless motor (24 V, 53 W) with integrated optical encoder (500 pulses per revolution) enabling closed-loop speed control and traceable flow calibration
• Compact footprint (280 mm length) with 1/8″ NPT internal threaded connections; optional thermal insulation module supports extended operating temperature range up to +100 °C (with qualification)

Sample Compatibility & Compliance

The MZR-6359 Ex accommodates Newtonian and mildly non-Newtonian fluids with viscosities from 0.3 to 100 mPa·s. Its ceramic and superalloy construction ensures compatibility with aggressive media including concentrated sulfuric and nitric acids, chlorinated hydrocarbons, fluorinated solvents (e.g., FC-40), and high-concentration caustic solutions. It meets material compatibility requirements referenced in ASTM D471 (elastomer resistance), ISO 15142-1 (pump performance testing), and EU Regulation (EC) No 1907/2006 (REACH). For regulated pharmaceutical or fine chemical applications, the pump supports GLP/GMP-aligned validation protocols—including IQ/OQ documentation templates—and its encoder-based motion control facilitates audit-ready traceability per FDA 21 CFR Part 11 when integrated with compliant SCADA or LIMS platforms.

Software & Data Management

While the MZR-6359 Ex operates as a standalone analog/digital-controlled device, it is compatible with third-party industrial controllers (e.g., Siemens S7, Beckhoff CX series) via 0–10 V analog input or RS-485 Modbus RTU interface (optional). The encoder output enables real-time flow calculation using external PLC logic or custom LabVIEW/Python scripts. HNPM provides configuration utilities for zero-point calibration, ramp profiling, and pulse counting integration. All operational parameters—including speed setpoint, actual RPM, cumulative volume, and runtime hours—are accessible via serial query for integration into MES or electronic batch record systems. No proprietary software lock-in is imposed; firmware updates are delivered via standard UART bootloader protocol.

Applications

This pump serves critical metering roles across multiple high-integrity sectors: continuous catalyst dosing in lab-scale flow hydrogenation reactors; precise co-injection of monomers and initiators in microfluidic polymerization; solvent-resistant adhesive dispensing in electronics encapsulation lines; vacuum-compatible reagent delivery in glovebox-integrated synthesis platforms; and controlled coating fluid supply in R&D-grade slot-die and spray coating rigs. It is routinely specified in OEM equipment for analytical sample introduction (e.g., LC autosampler auxiliary pumps), electroplating bath replenishment, and automated calibration standard preparation where repeatability, chemical resilience, and explosion safety are non-negotiable.

FAQ

What certifications does the MZR-6359 Ex hold for hazardous area installation?
It is certified to ATEX II 2G IIC c T4 X (EN 60079-0, -7, -11, -15, -31) for Group II gas atmospheres, Class IIC gas group, and Temperature Class T4. IECEx certification is available under separate application.
Can the pump handle abrasive slurries or particulates?
No—it is designed exclusively for clean, homogeneous liquids. Suspended solids >1 µm may compromise SSiC/ZrO₂ component longevity and void warranty.
Is flow rate linearly proportional to rotational speed?
Yes, within ±0.3% deviation across the 1–4700 rpm range, verified per ISO 5199 methodology using gravimetric collection and calibrated mass standards.
What is the maximum allowable inlet pressure?
The system supports up to 80 bar total pressure (inlet + differential), but differential pressure must remain within 0–40 bar depending on fluid viscosity (≤15 bar for η < 16 mPa·s).
Does HNPM provide validation support for regulated industries?
Yes—IQ/OQ protocol templates, material compliance dossiers (including EN 10204 3.1), and calibration certificates traceable to PTB (Physikalisch-Technische Bundesanstalt) are supplied with each unit.