Masterflex I/P Programmable Separable Peristaltic Pump System Model 77970-27

Overview

The Masterflex I/P Programmable Separable Peristaltic Pump System (Model 77970-27) is an industrial-grade, digitally controlled peristaltic pumping solution engineered for precision fluid handling in regulated laboratory, bioprocessing, and analytical environments. Based on the proven principle of positive displacement via occlusion—where rollers compress flexible tubing against a rigid housing—the system delivers repeatable, contamination-free transfer without valves, seals, or wetted metal components. Its separable architecture—comprising a remotely mounted motor drive and a standalone controller connected via a 7.6 m shielded cable—enables flexible installation in fume hoods, biosafety cabinets, or wall-mounted enclosures while maintaining operator safety and ergonomic access. Designed for compliance-critical workflows, the system supports programmable volumetric dispensing, bidirectional operation, and real-time monitoring of flow rate, rotational speed, cumulative volume, elapsed time, and cycle count—all displayed on a three-digit LED interface. The modular digital drive delivers stable torque across the full 20–650 rpm range, ensuring consistent performance with high-viscosity fluids and extended duty cycles.

Key Features

• Separable design with 7.6 m interconnect cable for remote motor placement—ideal for containment, sterilization, or space-constrained setups.
• Three-digit LED display showing real-time parameters: flow rate (L/min), speed (rpm), total volume dispensed (L), elapsed time (s), and cycle count.
• Full bidirectional control with pre- and post-run tubing rinse capability to minimize carryover and support cleaning-in-place (CIP) protocols.
• Programmable dispensing logic: define target volume (0.1–999 L), inter-dispense interval (1–999 s), and repetition count (1–99), enabling unattended batch processing.
• Onboard calibration memory stores correction factors for up to one set of tubing dimensions—automatically adjusting flow output based on selected I/P tubing type (e.g., I/P 26, 73, 82, 88, 89).
• Dual-head compatibility: two identical pump heads may be daisy-chained to a single drive unit, doubling throughput or enabling parallel sample handling—supported exclusively with silicone or C-Flex tubing.
• Robust motor architecture (1/5 HP, 150 W) with thermal protection and variable-speed digital control ensures long-term stability under continuous load.
• Keyboard lock function prevents inadvertent parameter changes during active operation—critical in shared-lab or GMP environments.

Sample Compatibility & Compliance

The Masterflex I/P system accommodates a broad spectrum of chemically resistant, USP Class VI–certified tubing—including Masterflex platinum-cured silicone, Saint-Gobain SPX50, Tygon® LFL, and C-Flex—ensuring compatibility with aggressive solvents, biological buffers, and sterile media. Tubing selection directly governs flow range and accuracy: I/P 26 (0.12–4.0 L/min), I/P 73 (0.2–8.0 L/min), I/P 82 (0.4–13.0 L/min), I/P 88 (0.5–17.0 L/min), and I/P 89 (0.52–17.0 L/min). All configurations maintain ±0.5% volumetric accuracy over calibrated ranges and ±0.3% speed repeatability. The system meets CE and cULus safety standards and conforms to ISO 9001:2000 quality management requirements. While not inherently 21 CFR Part 11–compliant, its deterministic control logic, non-volatile parameter storage, and hardware-based interlock functions support integration into validated systems under GLP/GMP frameworks when paired with compliant data acquisition software.

Software & Data Management

This standalone pump operates without proprietary software—relying instead on embedded firmware for all motion control and timing functions. Analog and digital input interfaces (0–20 mA, 4–20 mA, 0–10 V, TTL pulse) allow seamless integration with PLCs, SCADA systems, or custom LabVIEW/HAL-based automation platforms. The controller retains user-defined programs and calibration offsets in non-volatile memory, eliminating reconfiguration after power loss. For audit-ready environments, external data loggers can capture analog outputs synchronized to pump status signals (e.g., run/stop, direction, fault). Optional accessories—including foot switches (07595-42, 07595-43), hand-held controllers (07592-83), and extended remote cables (77300-32)—extend operational flexibility without compromising traceability or control integrity.

Applications

• Automated reagent dispensing in clinical chemistry analyzers and ELISA workstations.
• Continuous feed of cell culture media or harvest streams in upstream bioprocessing skids.
• Calibration standard delivery in HPLC and IC autosamplers requiring low pulsation and high reproducibility.
• Controlled dosing of pH adjusters, antifoams, or nutrients in bioreactor control loops.
• Environmental sampling systems where chemical resistance and leak-free operation are mandatory.
• Pharmaceutical formulation lines performing sequential addition of excipients under SOP-defined volume/time constraints.

FAQ

Can this pump be integrated into a 21 CFR Part 11–compliant workflow?
Yes—when used with validated third-party data acquisition software that provides electronic signatures, audit trails, and role-based access control. The pump itself provides deterministic analog/digital I/O and retains configuration state, satisfying core technical prerequisites.
What is the maximum allowable tubing wall thickness for dual-head operation?
Dual-head mode requires tubing with consistent durometer and wall geometry; only Masterflex silicone and C-Flex tubing are certified for this configuration. Wall thickness must match the I/P series designation (e.g., I/P 70: 4.8 mm wall) to ensure synchronized occlusion and torque distribution.
Does the system support dynamic flow rate adjustment during a running program?
No—flow rate is fixed at program initiation. To vary speed mid-cycle, external analog voltage or current signals must be applied in real time via the 0–10 V or 4–20 mA inputs, overriding the internal setpoint.
Is the controller rated for use in humid or washdown environments?
The 07592-27 desktop controller carries IP22 rating (drip-resistant); for splash-prone areas, specify the 07592-35 wall-mount variant (IP56-rated controller) with sealed mounting gasket and corrosion-resistant enclosure.
How does tubing calibration affect volumetric accuracy?
Calibration compensates for nonlinear flow vs. rpm relationships inherent to tubing elasticity and roller geometry. Each stored factor adjusts the drive’s output curve to deliver true volume within ±0.5%—provided tubing is correctly seated, undamaged, and operated within its specified pressure and temperature limits.