HNPM MZR-11557 Ex Intrinsically Safe Micro-Dosing Gear Pump

Overview

The HNPM MZR-11557 Ex is an intrinsically safe, precision micro-dosing gear pump engineered for continuous or intermittent metering of aggressive, corrosive, and high-value fluids in hazardous environments. Based on rotary micro annular gear technology, it delivers volumetrically accurate flow through positive displacement—eliminating reliance on fluid properties such as viscosity or compressibility for consistent dosing performance. Its robust mechanical design centers on chemically inert wetted materials—including Alloy C22 (DIN 2.4602) housing, sintered silicon carbide (SSiC) shafts and bearings, and stabilized zirconia (ZrO₂) rotors—enabling reliable operation across demanding chemical processing, pharmaceutical manufacturing, and vacuum-integrated coating applications. Certified to ATEX Directive 94/9/EC (now superseded by 2014/34/EU) for use in Zone 1 and Zone 2 explosive atmospheres (Group IIB, T3 temperature class), the pump integrates thermal protection via a six-element PTC resistor and meets IP55 ingress protection standards for dust and low-pressure water exposure.

Key Features

• ATEX-certified explosion protection (II 2G c IIB T3) for safe deployment in classified hazardous areas
• Volumetric accuracy with coefficient of variation (CV) < 1%, validated per ISO 5725-2 for repeatability under controlled process conditions
• Wide operational viscosity range (0.3–1,000 mPa·s), supporting aqueous solutions, solvents, adhesives, greases, gels, and shear-sensitive formulations
• Low-pulsation, low-shear delivery enabled by optimized micro-annular gear geometry and tight rotor-to-housing clearances
• High-pressure capability: up to 60 bar system pressure (inlet + differential), with differential pressure scaling inversely with fluid viscosity (e.g., 30 bar at 1 mPa·s; 60 bar ≥16 mPa·s)
• Modular wetted material options: FFKM (Kalrez® Spectrum™ 6375) seals standard; SS316L housing and tungsten carbide–nickel (WC-Ni) rotors available on request
• IEC 063-frame three-phase AC motor (250 W, 2-pole, 50 Hz) with integrated thermal monitoring and IP55 enclosure rating

Sample Compatibility & Compliance

The MZR-11557 Ex is compatible with a broad spectrum of process fluids encountered in fine chemical synthesis, formulation labs, and regulated production environments. Its wetted path—comprising Alloy C22 (resistant to chloride-induced stress corrosion cracking), SSiC (Vickers hardness >2500 HV), and ZrO₂ (low thermal expansion, high fracture toughness)—ensures long-term stability when handling halogenated solvents, strong acids (e.g., HCl, HNO₃), oxidizers, and high-polarity media. The pump complies with EU Machinery Directive 2006/42/EC, Electromagnetic Compatibility Directive 2014/30/EU, and Low Voltage Directive 2014/35/EU. For GMP-aligned installations, its sealed architecture supports cleaning-in-place (CIP) protocols using compatible caustic or acidic solutions (pH 1–13), and documentation packages include material traceability certificates (EN 10204 3.1) and ATEX conformity declarations.

Software & Data Management

While the MZR-11557 Ex operates as a standalone analog-controlled pump, it is fully compatible with industrial automation systems via 0–10 VDC or 4–20 mA analog input for speed regulation. Optional integration with programmable logic controllers (PLCs) enables synchronized dosing sequences, batch tracking, and audit-ready event logging. When deployed in FDA-regulated facilities, the pump may be incorporated into 21 CFR Part 11-compliant control architectures—provided upstream supervisory software implements electronic signatures, audit trails, and role-based access control. All firmware updates and configuration changes are documented per internal quality management system (QMS) procedures aligned with ISO 9001:2015 and ISO 13485:2016 requirements.

Applications

• Continuous catalyst injection in multiphase reactor trains (petrochemical & specialty polymer synthesis)
• Precision metering of UV-curable adhesives and conductive pastes in electronics assembly
• Dosing of active pharmaceutical ingredients (APIs) and excipients during lyophilization or spray drying feed preparation
• Controlled delivery of pigments and resins in inkjet ink formulation and high-solids coating lines
• Vacuum-compatible fluid transfer in thin-film deposition chambers (e.g., ALD, CVD precursors)
• Automated reagent dispensing in analytical sample preparation workflows requiring sub-milliliter reproducibility

FAQ

What certifications does the MZR-11557 Ex hold for hazardous area use?

It carries full ATEX certification (II 2G c IIB T3) per Directive 2014/34/EU, permitting installation in Zone 1 and Zone 2 gas explosion hazard areas.
Can this pump handle abrasive slurries or particulate-laden fluids?

No—it is designed exclusively for homogeneous liquids. Suspended solids exceeding 5 µm or concentrations >50 ppm may accelerate wear of ceramic components and void warranty coverage.
Is the pump suitable for sterile or aseptic processing?

While not autoclavable, its smooth, crevice-free wetted surfaces support SIP (steam-in-place) validation when installed with tri-clamp fittings and appropriate elastomer selection (e.g., EPDM for low-end temperature cycles).
What is the recommended maintenance interval under continuous operation?

HNPM specifies 6,000 operating hours or 12 months—whichever occurs first—for full inspection and bearing/seal replacement, based on ISO 15243 vibration and wear analysis thresholds.
Does the pump support bidirectional flow?

No—rotation direction is fixed per motor winding configuration; reversal requires hardware modification and invalidates ATEX certification.