Tongtian TBP-5H02 Dual-Piston Constant Flow Pump

Overview

The Tongtian TBP-5H02 Dual-Piston Constant Flow Pump is a microprocessor-controlled, high-stability positive displacement pump engineered for precise, pulse-minimized liquid delivery in analytical, preparative, and process-critical laboratory applications. Based on dual-piston reciprocating architecture with active flow compensation, it operates on the principle of synchronized displacement cycles—where one piston draws while the other delivers—achieving continuous volumetric flow with minimal pressure fluctuation (< 0.10 MPa). This design eliminates the need for passive dampeners while maintaining mechanical robustness and long-term calibration stability. The pump is specifically optimized for medium-pressure operation (up to 2.0 MPa), making it suitable for HPLC auxiliary delivery, solvent recycling loops, reaction feed systems, and continuous extraction workflows where reproducible mass transfer and low shear stress are essential.

Key Features

• Dual-piston hydraulically balanced architecture ensures inherently low pulsation and extended sapphire ball/stem service life
• Chemically inert wetted path composed of sapphire (piston balls and seats), 316L stainless steel (manifolds and housing), and zirconia ceramic (seals and check valves)—validated for compatibility with acetonitrile, THF, chlorinated solvents, and aqueous acids/bases up to pH 2–12
• Integrated overpressure protection circuitry with automatic shutdown at user-defined thresholds (adjustable from 0.5–2.0 MPa)
• Real-time digital monitoring via backlit LCD: simultaneous display of setpoint and actual pressure (MPa), flow rate (mL/min), elapsed runtime, and system status flags
• RS232 serial interface compliant with standard SCPI command syntax, enabling direct integration into LabVIEW, Python-based control frameworks, or custom LIMS environments
• Onboard flow calibration routine with linearization correction across full dynamic range (1–500 mL/min), traceable to gravimetric standards per ISO 4064-2
• Manual and automated air purge mode with dedicated vent valve—designed to evacuate entrained gas without disassembling fluidic path

Sample Compatibility & Compliance

The TBP-5H02 accommodates a broad spectrum of Newtonian and mildly non-Newtonian liquids including organic solvents, buffer solutions, polymer solutions (up to 10 cP), and suspensions with particle sizes < 5 µm. Its material construction meets ASTM F2083 requirements for biocompatible fluid-contact surfaces and complies with ISO 13485 manufacturing controls for medical device-related fluid handling components. While not certified as Class I medical equipment, its design supports GLP-compliant operation when deployed in validated analytical workflows (e.g., USP method transfer, EPA Method 8081B sample introduction). All firmware revisions maintain audit trail functionality—including timestamped parameter changes and emergency stop events—as required under FDA 21 CFR Part 11 for electronic records in regulated pharmaceutical QC labs.

Software & Data Management

The pump ships with Tongtian PumpControl v3.2 (Windows 10/11 compatible), a deterministic real-time control application supporting both manual setpoint entry and script-driven sequence execution. Key software capabilities include: programmable multi-step gradient profiles (flow + pressure ramps), scheduled start/stop timers with calendar-based triggers, live pressure vs. time curve plotting with export to CSV/PNG, and automated report generation (PDF) containing operational metadata, calibration logs, and deviation alerts. Data integrity is enforced via SHA-256 hashing of all configuration files and write-protected internal EEPROM storage for critical parameters. Remote diagnostics are accessible via encrypted Telnet session when connected through industrial Ethernet-to-RS232 gateways.

Applications

• HPLC mobile phase delivery in method development labs requiring stable flow under variable backpressure conditions
• Continuous feeding of reagents in flow chemistry reactors (e.g., photochemical halogenations, enzymatic cascades)
• Automated solvent exchange in membrane filtration and diafiltration setups
• Calibration fluid delivery for flowmeter validation per ISO/IEC 17025 accredited testing laboratories
• Process-scale chromatography buffer preparation and loading in pilot bioprocessing suites
• Environmental water analysis systems performing on-line solid-phase extraction (SPE) with programmable elution volumes

FAQ

What is the maximum allowable particulate concentration in the pumped fluid?
Particles must be < 5 µm in diameter and non-abrasive; filtration through a 0.45 µm inline filter is strongly recommended prior to inlet connection.
Can the TBP-5H02 be operated in parallel with another pump for higher total flow?
Yes—dual-pump synchronization is supported via TTL trigger input/output ports for master-slave timing; however, independent pressure regulation per channel requires external pressure regulators.
Is firmware upgrade available remotely?
Firmware updates require local USB-to-RS232 adapter connection and must be performed using Tongtian’s signed update utility; no over-the-air (OTA) capability is implemented for security reasons.
Does the pump support analog input for external flow setpoint modulation?
No analog voltage/current input is provided; all setpoints are digitally defined via RS232 or front-panel interface.
What maintenance intervals are recommended for optimal performance?
Sapphire components require inspection every 2,000 operating hours; seal replacement is advised every 12 months or after 500 hours of aggressive solvent use (e.g., DMSO, DMF, concentrated HCl).