HNPM MZR-2909 Ex ATEX-Certified Micro-Dosing Gear Pump

Overview

The HNPM MZR-2909 Ex is a precision-engineered, ATEX-certified micro-dosing gear pump designed for safe, repeatable, and pulse-free delivery of low-to-high viscosity fluids in explosive atmospheres. Based on rotary micro annular gear technology, it operates on the principle of positive displacement through synchronized, non-contacting ceramic-coated gears—eliminating sliding friction and minimizing shear stress on sensitive media. Unlike peristaltic or syringe-based systems, this pump delivers inherently low pulsation (<0.5 % ripple amplitude) and exceptional volumetric accuracy across its full operational range. Its compact footprint (length < 295 mm, including explosion-proof motor) enables integration into confined process skids, analytical instrumentation, and automated lab-scale reactors where space, safety, and metrological traceability are critical. The MZR-2909 Ex complies with Directive 94/9/EC (ATEX 95) and carries CE marking under Category II 2G c T5 X, permitting use in Zone 1 and Zone 2 classified areas per EN 60079-0 and EN 60079-31.

Key Features

• ATEX-certified explosion-proof design (II 2G c T5 X) for continuous operation in hazardous environments (gas group IIB, temperature class T5)
• Ultra-low coefficient of variation (CV < 1 %) validated per ISO 5725-2 for reproducible dosing in GLP/GMP-aligned workflows
• Wide dynamic viscosity range: 0.3–5000 mPa·s — compatible with methanol, solvents, adhesives, lubricating oils, gels, and shear-thinning formulations
• Ceramic-enhanced wetted components (tungsten carbide gears, SS 316L housing, Ni-based alloys) ensure long service life and chemical resistance to aggressive media
• Rotary annular gear architecture delivers inherently low pulsation and minimal shear, preserving integrity of emulsions, suspensions, and biologics
• Modular expandability: optional fluid seal modules support inlet pressures up to 10 bar; encoder feedback (500 ppr) enables closed-loop speed and position control
• 24 V DC brushless motor with integrated thermal protection and IP65-rated enclosure for industrial-grade reliability

Sample Compatibility & Compliance

The MZR-2909 Ex is suitable for precise metering of aqueous solutions, organic solvents, low- to medium-viscosity oils, polymer dispersions, and thixotropic pastes. Its wetted path—comprising ASTM A276 Type 316L stainless steel (1.4404 / 1.4435), tungsten carbide gear surfaces, and graphite-reinforced PTFE shaft seals—meets USP Class VI and FDA-compliant material requirements for pharmaceutical and food-contact applications (when specified). Static seals utilize FPM (Viton®) as standard; EPDM and FFPM variants are available for enhanced compatibility with polar solvents or high-purity water systems. The pump conforms to IECEx and ATEX directives, and its mechanical design satisfies EN 13463-1 (non-electrical equipment for explosive atmospheres) and EN 60079-31 (equipment protection by encapsulation). Documentation includes EU Declaration of Conformity, test reports from notified body PTB (Physikalisch-Technische Bundesanstalt), and traceable calibration certificates upon request.

Software & Data Management

While the MZR-2909 Ex operates as a standalone analog/digital-controlled pump, it is fully compatible with third-party PLCs (e.g., Siemens S7, Beckhoff CX series), SCADA platforms, and laboratory automation frameworks via 0–10 V analog input or RS-485 Modbus RTU interface. Encoder feedback supports real-time speed monitoring and dose verification, enabling audit-ready data logging in compliance with FDA 21 CFR Part 11 when integrated with validated software environments. Optional HNPM Control Suite (v3.x) provides dose programming, multi-step sequence execution, error logging with timestamped event history, and export of CSV-formatted dosing records for QA review. All firmware updates follow IEC 62443-2-4 secure update protocols, and configuration changes are logged with user ID and time stamp for full traceability.

Applications

• Continuous reagent dosing in explosion-proof chemical synthesis reactors and pilot-scale flow chemistry systems
• Precision metering of catalysts, initiators, or crosslinkers in adhesive and coating formulation lines
• Controlled delivery of solvents and monomers in vacuum-assisted impregnation and resin transfer molding (RTM)
• Automated sample introduction in GC, HPLC, and ICP-MS front-end systems requiring inert, pulse-free flow
• Dose-critical applications in pharmaceutical manufacturing: excipient addition, API solution handling, and lyophilization buffer preparation
• Low-volume dispensing in semiconductor wafer cleaning, photoresist application, and MEMS packaging processes
• Calibration fluid delivery in field-deployable gas analyzers and environmental emission monitors operating in Zone 1 areas

FAQ

What ATEX zone classifications does the MZR-2909 Ex support?
It is certified for Zone 1 and Zone 2 (gas group IIB, T5 temperature class) per Directive 94/9/EC and EN 60079-0.
Can the pump handle abrasive or particulate-laden fluids?
Yes—ceramic-coated gears and hardened SS 316L components provide robust resistance to mild abrasion; however, filtration to ≤10 µm is recommended for extended service life.
Is the flow rate linearly proportional to rotational speed across the entire 1–4700 rpm range?
Yes, linearity deviation is ≤±0.25 % of full scale within the specified viscosity and pressure envelope, verified per ISO 5167-1 calibration methodology.
Does the pump require periodic recalibration?
No scheduled recalibration is mandated; however, users performing critical GxP work should validate performance annually using gravimetric or timed-collected volume methods per USP .
Are custom wetted materials or sealing options available for highly corrosive chemistries?
Yes—HNPM offers bespoke configurations including Hastelloy C-276 housings, sapphire bearings, and Kalrez® 4079 static seals upon engineering review and qualification testing.