Jiapeng DHL-A Digital Peristaltic Pump with Microcomputer Control
| Brand | Jiapeng |
|---|---|
| Origin | Shanghai, China |
| Model | DHL-A |
| Pump Type | Dual-Channel Peristaltic Pump |
| Flow Rate Range | 2 × (0.6–900) mL/h |
| Speed Range | 0–65 rpm |
| Speed Resolution | 0.1 rpm |
| Maximum Pressure | ≥3 kg/cm² |
| Tube Compatibility | Ø1.2×3 mm, 3×5 mm |
| Quantitative Volume Range | 0.01–99990 mL |
| Flow Calibration Range | 1–300% |
| Power Supply | AC 220 V, 50/60 Hz |
| Dimensions (L×W×H) | 125×150×180 mm |
| Weight | 1.55 kg |
Overview
The Jiapeng DHL-A Digital Peristaltic Pump is a dual-channel, microprocessor-controlled peristaltic pump engineered for precise, repeatable fluid delivery in analytical and preparative laboratory workflows. Operating on the principle of positive displacement via roller compression of flexible tubing, the DHL-A delivers accurate flow rates without internal fluid contact—ensuring sample integrity, cross-contamination prevention, and compatibility with aggressive or shear-sensitive solutions. Its design supports integration into modular chromatography systems, including nucleic acid/protein detection units and fraction collectors, enabling automated eluent delivery, gradient formation, and timed collection protocols under ambient or controlled environmental conditions.
Key Features
- Dual independent channels with synchronized or asynchronous operation, each supporting flow rates from 0.6 to 900 mL/h—ideal for parallel processing or balanced buffer/solvent delivery.
- High-resolution speed control (0.1 rpm resolution) across a 0–65 rpm range, enabled by a high-torque stepper motor with multi-step subdivision drive technology for smooth, low-vibration rotation.
- Real-time flow calibration function: users input measured actual flow against setpoint values, and the system automatically calculates and applies correction factors—improving long-term volumetric accuracy without hardware adjustment.
- Ergonomic 80° inclined front panel with large-backlit blue-membrane LCD display, showing real-time flow rate, rotational speed, direction, elapsed time, and quantitative volume—optimized for visual clarity and operational accessibility.
- Full-directional motor control (forward/reverse), programmable sleep mode (1 second to 59 hours 59 minutes), and selectable operating modes—including constant-flow mode and calibration mode—for method flexibility.
- Robust housing molded from high-strength, flame-retardant ABS polymer; chemically resistant, non-porous, and compliant with standard lab cleaning protocols.
Sample Compatibility & Compliance
The DHL-A accommodates standard silicone or fluoropolymer tubing sizes (Ø1.2×3 mm and 3×5 mm), supporting aqueous buffers, organic solvents, mild acids/bases, and viscous biological media up to 3 kg/cm² backpressure. While not certified for hazardous area use, its electrical design conforms to IEC 61010-1 safety standards for laboratory equipment. The pump’s tube-based fluid path eliminates valves and seals, simplifying validation and reducing maintenance requirements—making it suitable for GLP-aligned workflows where traceability and repeatability are critical. It does not meet FDA 21 CFR Part 11 requirements out-of-the-box but supports audit-ready manual logging when used with validated SOPs.
Software & Data Management
The DHL-A operates as a standalone instrument with embedded firmware—no external PC software required. All parameters (flow rate, duration, volume, direction, calibration offset) are stored in non-volatile memory and retained after power cycling. An analog/digital external control interface (TTL-level trigger input/output) enables synchronization with fraction collectors, UV detectors, or PLC-based automation systems. While no proprietary data export protocol is provided, time-stamped operational logs can be manually recorded using the built-in timer and quantitative counters—supporting basic traceability in ISO/IEC 17025-compliant testing environments.
Applications
- Preparative liquid chromatography: consistent mobile phase delivery in column-based purification of proteins, peptides, and small molecules.
- Nucleic acid and protein analysis: coupled with UV absorbance monitors and fraction collectors for automated peak-directed collection during gel filtration or ion-exchange runs.
- Cell culture media perfusion: low-shear transfer of sensitive biologics and conditioned media in benchtop bioreactor support systems.
- Calibration and standard preparation: gravimetrically verified dispensing for analytical reference solution generation.
- Environmental and food testing labs: handling of extractants and digestates in EPA- or AOAC-aligned sample preparation protocols.
FAQ
What tubing sizes are compatible with the DHL-A pump head?
The DHL-A supports two standard inner/outer diameter configurations: Ø1.2×3 mm and 3×5 mm—commonly used silicone or Pharmed®-grade tubing.
Can the DHL-A operate in reverse direction continuously?
Yes—the motor supports bidirectional continuous rotation, enabling backflushing, priming, or recirculation applications.
Is flow calibration performed per channel or globally?
Calibration is channel-specific; each of the two pump heads can be independently calibrated using its own reference measurement.
Does the DHL-A include overload or dry-run protection?
No automatic dry-run or stall detection is integrated; users must ensure tubing is properly loaded and primed prior to operation.
What is the maximum allowable backpressure for sustained operation?
The pump maintains rated flow performance up to ≥3 kg/cm² (≈294 kPa); prolonged operation above this threshold may accelerate tubing fatigue.
