PreFluid WF300 High-Precision Dispensing Peristaltic Pump

Overview

The PreFluid WF300 High-Precision Dispensing Peristaltic Pump is an industrial-grade peristaltic fluid handling system engineered for repeatable, gravimetrically validated dispensing in regulated laboratory and manufacturing environments. Based on the principle of positive displacement via sequential occlusion of flexible tubing by rotating rollers, the WF300 delivers precise volumetric delivery without contact between the pump mechanism and the fluid—ensuring contamination-free operation essential for diagnostic reagent production, pharmaceutical formulation, and fine chemical synthesis. Its core architecture integrates a high-torque brushless DC servo motor with real-time closed-loop speed feedback, enabling stable rotational control across its full 0.1–600 rpm range. The pump supports both continuous flow and discrete dispensing modes, with programmable acceleration/deceleration profiles to mitigate splashing, foaming, and post-dispense drip—critical for sub-second, high-cycle-volume applications such as automated assay kit filling.

Key Features

• Dispensing accuracy ≤ ±0.5% (gravimetrically verified under ISO 8655-compliant conditions), supporting compliance with USP & FDA 21 CFR Part 11 requirements for electronic records when paired with audit-trail-capable software.
• Large backlit LCD display with intuitive bilingual (English/Chinese) menu navigation, real-time parameter visualization (speed, volume dispensed, elapsed time, pulse count), and on-screen calibration prompts.
• IP54-rated metal enclosure with electrostatically applied corrosion-resistant coating; front-mounted control panel with tactile feedback keys and configurable audible alerts (enable/disable).
• Dual-pump-head configuration support (e.g., YZ15-II in Y-configuration with 30° phase offset) reduces pulsation amplitude by >65% versus single-head operation—verified per ASTM D4007 pulse measurement guidelines.
• Programmable dispensing parameters including pre-fill priming, post-dispense retraction (0–360° adjustable), no-bottle detection, auto-empty cycle, and volume-based or time-based termination.
• External control compatibility via isolated 4–20 mA analog signal or RS485 serial interface using Modbus RTU protocol—enabling integration into PLC-driven production lines or LIMS-controlled workflows.
• Non-volatile memory stores up to 12 complete dispensing protocols with full parameter recall after power interruption; retains last-used interface language, speed, and volume settings.

Sample Compatibility & Compliance

The WF300 accommodates standard peristaltic tubing sizes from #13 to #36 (ID 0.5–6.4 mm), including silicone, PharMed® BPT, and C-Flex® chemically resistant elastomers. Tubing selection directly governs flow range, pulse profile, and chemical compatibility—users must validate tubing performance against their specific fluid matrix (e.g., glycerol-buffered diagnostic reagents, ethanol-based flavor carriers, or low-surface-tension surfactant solutions). The system complies with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emission) electromagnetic compatibility standards. While not certified to GLP or GMP out-of-the-box, its deterministic control logic, traceable calibration routines, and protocol memory meet foundational prerequisites for validation under ISO/IEC 17025 or Annex 11 frameworks when deployed with documented SOPs.

Software & Data Management

The WF300 operates autonomously via its embedded firmware but supports external supervisory control through Modbus RTU over RS485. Integration-ready commands allow remote initiation/termination of runs, dynamic speed adjustment, direction reversal, and status polling (e.g., “is dispensing active?”, “current volume delivered”). For traceability-critical applications, third-party SCADA or MES platforms can log timestamped operational events—including start/stop triggers, error codes (e.g., tubing occlusion, motor stall), and final dispensed volume—to structured databases. Optional PC-based configuration utilities enable batch protocol export/import and firmware updates compliant with secure boot verification.

Applications

• Diagnostic reagent manufacturing: High-frequency dispensing of 20 mL aliquots at ≤2 s/cycle with ≤±1% RSD—validated using calibrated balance and NIST-traceable weights per CLSI EP10-A3 protocol.
• Cell culture media preparation: Sterile transfer of pH- and temperature-sensitive formulations using gamma-irradiated silicone tubing and laminar-flow hood-compatible mounting.
• Food & beverage R&D: Precise metering of natural colorants, sweeteners, or probiotic suspensions into ready-to-drink formats where shear sensitivity and oxidation avoidance are critical.
• Microfluidic device priming: Low-flow (<1 mL/min) controlled filling of capillary networks and cartridge-based assays without bubble entrapment.
• Continuous chromatography buffer delivery: Stable gradient elution support in preparative HPLC systems where flow consistency directly impacts resolution and column lifetime.

FAQ

What tubing sizes are supported, and how do they affect flow accuracy?
The WF300 accepts tubing IDs from 0.5 mm (#13) to 6.4 mm (#36). Smaller IDs improve low-flow precision but increase backpressure sensitivity; larger IDs maximize throughput but require tighter roller compression control. Accuracy specifications assume validated tubing material and consistent wall thickness per ISO 3307.

Can the WF300 be integrated into a 21 CFR Part 11-compliant workflow?
Yes—when used with validated Modbus-enabled SCADA software that provides electronic signatures, audit trails, and role-based access control, the WF300 serves as a compliant actuator within a broader Part 11 system architecture.

Is pulse suppression mandatory for diagnostic reagent dispensing?
For volumes ≥10 mL dispensed in <3 seconds, dual-head Y-configuration is strongly recommended to maintain ≤±0.8% RSD under dynamic load conditions, as confirmed by internal repeatability testing per ISO 5725-2.

Does the pump support automatic calibration verification?
It includes guided on-screen calibration routines using user-provided reference weights, generating a calibration log file with date, operator ID, and deviation values—exportable via USB or serial interface.

What is the expected service life of the brushless motor under continuous operation?
Rated for >20,000 hours MTBF at 40 °C ambient, with thermal protection circuitry preventing demagnetization or winding degradation during sustained high-torque operation.