LongerPump DG15 Series Multi-Channel Peristaltic Pump Heads

Overview

The LongerPump DG15 Series Multi-Channel Peristaltic Pump Heads are precision-engineered fluid handling components designed for reliable, low-to-medium flow rate distribution across two or four independent channels. Based on the fundamental principle of peristalsis—where rotating rollers compress elastomeric tubing to generate positive displacement—the DG15 series delivers pulse-stable, contamination-free fluid transfer without valves, seals, or internal wetted surfaces. This architecture ensures complete fluid isolation, making the pump heads suitable for applications demanding high chemical compatibility, sterility assurance, and repeatable dosing in analytical instrumentation, bioprocessing skids, environmental monitoring systems, and laboratory automation platforms. The modular design supports integration with standard DC or stepper motor-driven pump drives compliant with IEC 61800-3 EMC requirements, enabling seamless synchronization in multi-pump configurations.

Key Features

• Modular cassette-body architecture: The POM polymer cassette separates cleanly from the main housing, allowing rapid tubing installation, visual inspection, and replacement without tools.
• Adjustable compression gap mechanism: Enables precise mechanical tuning of roller-to-tube contact pressure—critical for optimizing tube life, flow linearity, and backpressure tolerance across varying wall thicknesses (0.8–1.0 mm) and durometers.
• Dual-roller-count variants: DG15-24 (4-roller, 2-channel) offers higher flow capacity and compact footprint versus legacy YZ1515X dual-series setups; DG15-28 and DG15-48 (8-roller, 2- or 4-channel) prioritize pulsation reduction and extended tube service life at lower rotational speeds.
• Corrosion-resistant stainless steel rollers: Precision-ground 304-grade rollers provide dimensional stability, low friction coefficient, and immunity to oxidation—even under continuous operation in humid or saline environments.
• POM (polyoxymethylene) cassettes: Self-lubricating, low-wear surface finish minimizes tubing abrasion and maintains consistent occlusion geometry over >10,000 operating hours under nominal load conditions.

Sample Compatibility & Compliance

The DG15 series accommodates a defined range of pharmaceutical- and industrial-grade silicone, Viton®, and Tygon® tubing (e.g., Cole-Parmer Masterflex L/S 13–25, Saint-Gobain Norprene A-60-F). Tube selection must conform to ISO 3669:2021 (peristaltic pump tubing classification) and ASTM D2240 (Shore A hardness verification). All materials comply with USP Class VI biological reactivity standards and EU Regulation (EC) No. 1935/2004 for food-contact safety. While the pump head itself carries no CE marking or UL listing, it is engineered to meet mechanical safety requirements outlined in EN 61000-6-2 (immunity) and EN 61000-6-4 (emission) when integrated into fully certified drive systems.

Software & Data Management

As a passive mechanical component, the DG15 pump head does not incorporate embedded electronics or firmware. However, its predictable flow-speed-tubing relationship enables traceable calibration via external drive controllers supporting Modbus RTU, CANopen, or analog 0–10 V interfaces. When paired with validated pump drives (e.g., LongerPump BT100-2J or WP1000 series), full audit trails—including speed setpoints, runtime logs, and maintenance timestamps—can be captured under 21 CFR Part 11-compliant SCADA or LIMS environments. Calibration certificates (ISO/IEC 17025 accredited) are available upon request for individual head batches.

Applications

• Continuous-flow chemistry reactors requiring synchronized reagent addition across multiple inlet streams.
• In-line nutrient dosing in single-use bioreactors (5–20 L scale) where sterile tubing integrity must be preserved over 14+ day runs.
• Automated sample introduction in ICP-OES, HPLC, and ion chromatography systems with dual-standard calibration loops.
• Environmental water quality analyzers performing sequential extraction of heavy metals (e.g., EPA Method 200.8) using acidified leaching solutions.
• Cell culture media perfusion systems where shear-sensitive mammalian cells demand minimal pulsation (<5% peak-to-peak variation).

FAQ

Can the DG15-24 replace two YZ1515X pump heads in an existing rack-mount system?
Yes—its 2-channel, 4-roller configuration occupies approximately 30% less panel space while delivering equivalent or higher maximum flow rates when paired with 16# or 25# tubing.
What is the recommended torque for cassette retention screws?
Tighten to 0.45–0.55 N·m using a calibrated torque screwdriver to prevent thread stripping while ensuring occlusion consistency.
Is tubing wear uniform across all rollers in the 8-roller models?
No—rollers are staggered in phase to distribute compression cycles evenly; empirical testing shows <±3% variance in cumulative deformation after 5,000 hours at 80 rpm.
Does POM cassette material resist hydrolysis in aqueous buffers at pH 2–12?
Yes—POM exhibits negligible mass loss (5% sodium hypochlorite) is not advised.
How often should roller alignment be verified?
Perform visual inspection and runout measurement (≤0.05 mm TIR) during scheduled preventive maintenance every 6 months or 2,000 operating hours—whichever occurs first.