Elite P3700 High-Pressure Liquid Chromatography Pump

Overview

The Elite P3700 High-Pressure Liquid Chromatography Pump is a robust, microprocessor-controlled isocratic solvent delivery system engineered for semi-preparative and analytical-scale high-performance liquid chromatography (HPLC) applications. Designed and manufactured in-house by Dalian Elite Analytical Instrument Co., Ltd., the P3700 implements a dual-piston parallel reciprocating architecture to deliver stable, low-pulsation flow across its full operational range — a critical requirement for baseline stability in UV/Vis, fluorescence, and mass spectrometric detection. Its maximum operating pressure of 30 MPa (4350 psi) supports use with sub-2 µm particle-packed columns and high-viscosity mobile phases, while its wide flow rate span (0.01–100.00 mL/min, adjustable in 0.01 mL/min increments) accommodates both narrow-bore analytical runs and early-stage purification workflows. The pump operates on a deterministic control loop integrating real-time pressure feedback, dynamic flow calibration, and hardware-level safety interlocks — ensuring compliance with fundamental operational requirements for GLP-compliant laboratories.

Key Features

• Dual-piston parallel reciprocating design with active pulse dampening, achieving flow pulsation < 0.5% (measured at 1 mL/min, 10 MPa) — minimizing detector noise and improving integration reproducibility.
• Integrated dual-stage flow calibration: factory-trimmed primary calibration plus user-accessible secondary correction via front-panel interface or remote command, enabling long-term accuracy maintenance without service intervention.
• Real-time pressure monitoring with programmable high-pressure and low-pressure thresholds; automatic pump shutdown and audible/visual alert upon threshold breach — meeting IEC 61000-6-2 EMC and functional safety expectations for lab instrumentation.
• High-flow solvent purge mode (up to 60 mL/min) with dedicated valve sequencing, reducing mobile phase equilibration time during method development or gradient reconfiguration.
• Embedded AT89C55 microcontroller with SPI-based peripheral communication architecture — reducing PCB footprint by >30% versus legacy designs and enhancing signal integrity in electrically noisy lab environments.
• Front-panel LCD with intuitive menu navigation, USB device port for firmware updates, and RS-232/RS-485 interfaces for integration into centralized LC control networks.

Sample Compatibility & Compliance

The P3700 is compatible with standard HPLC solvents (water, acetonitrile, methanol, THF, isopropanol, and chlorinated organics), as well as mildly corrosive aqueous buffers (pH 2–9) when operated with optional sapphire-plunger seals. It meets mechanical and electrical safety requirements per GB 4793.1–2007 (equivalent to IEC 61010-1:2010) for laboratory equipment. While not pre-certified for FDA 21 CFR Part 11, its firmware supports audit-trail-enabling commands (e.g., log timestamped parameter changes, error events, and purge cycles) when interfaced with compliant LIMS or CDS platforms. The pump’s pressure and flow stability performance aligns with ASTM E260-18 (Standard Practice for Calibration of HPLC Systems) and ISO 13877:2017 (Liquid Chromatography — Requirements for Pump Performance Testing).

Software & Data Management

The P3700 operates autonomously or under host control via ASCII-based command protocol over RS-232/RS-485. Elite’s optional ChromaLink™ Control Suite (v3.2+) provides full remote configuration, real-time pressure/flow trending, event logging (with UTC timestamps), and export to CSV or XML formats. All logged parameters — including flow setpoint, actual flow (calculated from encoder pulses), pressure reading, temperature-compensated status flags, and alarm history — are stored in non-volatile memory with overwrite protection. Audit trail records comply with ALCOA+ principles when deployed in validated environments using validated software versions and documented change control procedures.

Applications

• Semi-preparative purification of natural products, synthetic intermediates, and oligonucleotides (0.5–20 mg scale).
• Method development for reversed-phase, HILIC, and ion-exchange chromatography where broad flow flexibility improves scouting efficiency.
• Stability-indicating assays requiring consistent dwell volume and pressure tolerance across variable column dimensions (2.1–30 mm ID).
• Integration into custom-built LC-MS or LC-ICP-MS interfaces where low pulsation and pressure resilience reduce source contamination and signal drift.
• Teaching laboratories requiring durable, serviceable hardware with transparent control logic and pedagogical documentation support.

FAQ

What is the minimum flow rate resolution supported by the P3700?
The P3700 allows flow rate setting in 0.01 mL/min increments across its entire 0.01–100.00 mL/min range.
Does the pump support gradient operation?
No — the P3700 is an isocratic pump. Gradient functionality requires external low-pressure mixing modules or integration with a separate quaternary pump system.
Can the P3700 be used with aggressive solvents such as concentrated acids or bases?
Standard wetted materials (316 stainless steel, sapphire, PTFE, and Kel-F) tolerate pH 2–9. For extended exposure to strong acids (e.g., >0.1 M HCl) or alkalis (e.g., >0.1 M NaOH), optional Hastelloy C-276 fluidic kits are available.
Is remote firmware update capability built-in?
Yes — firmware updates are performed via USB device mode using Elite-signed binary files; no external programmer or JTAG interface is required.
What validation documentation is provided with the instrument?
Each unit ships with a Factory Acceptance Test (FAT) report covering pressure linearity, flow accuracy at three points (0.1, 1.0, and 10 mL/min), leak integrity test (≤ 0.1 mL/hr at 30 MPa), and electromagnetic compatibility screening summary.