Redi-Flo2 Submersible Well Purging and Sampling Pump by SAIL HERO

Overview

The Redi-Flo2 Submersible Well Purging and Sampling Pump, manufactured by SAIL HERO under licensed technology collaboration with Geotech, is an engineered solution for regulated groundwater monitoring programs requiring high-fidelity sample integrity and methodologically compliant well development. Based on positive displacement peristaltic pumping principles, the Redi-Flo2 delivers laminar, low-shear fluid transport—minimizing turbulence-induced resuspension of sediments and preventing cross-contamination between sampling intervals. Its design adheres to U.S. EPA Method 5310B (Low-Flow Groundwater Sampling), ASTM D6771 (Standard Guide for Low-Flow Purging and Sampling of Groundwater), and ISO 5667-11 (Water Quality – Sampling – Part 11: Guidance on Sampling of Groundwater). The pump operates continuously at stable flow rates across its full range, enabling simultaneous purging and sampling without equipment changeover—a critical requirement for time-sensitive field campaigns and regulatory audits.

Key Features

• Chemically inert wetted materials—including FDA-listed silicone tubing, PTFE-coated stainless-steel housing, and 316 SS drive components—ensure minimal analyte adsorption and facilitate rapid decontamination between sampling events.
• Compact 4.6 cm outer diameter allows deployment in narrow-diameter monitoring wells (≥5 cm ID), including PVC, stainless steel, and HDPE casings commonly used in environmental site assessments.
• Integrated compatibility with the Redi-Flo VFD variable frequency drive enables precise, stepless flow control from 100 mL/min (for low-flow VOC or trace-metal sampling) up to 30 L/min (for efficient initial well purging).
• No external flow-control valves or throttling devices required—the VFD adjusts motor speed directly, eliminating pressure spikes, pulsation artifacts, and mechanical wear associated with traditional gate-valve regulation.
• Modular construction supports rapid field disassembly for cleaning, calibration verification, or component replacement; all major subassemblies are serviceable without specialized tools.
• Robust architecture rated for continuous submerged operation at depths up to 85 meters, with IP68 ingress protection and temperature tolerance from 0 °C to 40 °C.

Sample Compatibility & Compliance

The Redi-Flo2 meets stringent sample integrity requirements for volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), metals (including hexavalent chromium and methylmercury), nutrients (nitrate, phosphate), and dissolved gases (e.g., methane, radon). Its low-turbulence delivery preserves redox conditions and prevents degassing during ascent—critical for accurate speciation analysis. The system complies with U.S. EPA Region 9 Low-Flow Sampling Protocol, California Department of Toxic Substances Control (DTSC) Technical Guidance, and European Standard EN ISO 5667-3. All wetted surfaces conform to FDA 21 CFR §177.2600 for repeated-use elastomeric components. Documentation packages include factory calibration certificates traceable to NIST standards and material compliance declarations (RoHS, REACH).

Software & Data Management

While the Redi-Flo2 operates as a hardware-integrated analog system, its VFD controller logs real-time operational parameters—including runtime, average flow rate, motor RPM, and thermal load—via RS-485 Modbus RTU output. These data streams integrate natively with industry-standard environmental data management platforms (EDMs) such as EQuIS, GeoVision, and AQUA. Optional firmware upgrades support audit-trail-enabled logging compliant with 21 CFR Part 11 when paired with validated EDM software. Field technicians can export timestamped CSV reports for QA/QC review, chain-of-custody documentation, and regulatory submission (e.g., EPA Form 1010, DTSC Form 153).

Applications

• Regulatory groundwater monitoring at RCRA, CERCLA, and UST sites
• Long-term trend analysis in multi-level monitoring wells
• Pre-construction baseline characterization for brownfield redevelopment
• Source identification and plume delineation studies
• Validation of in-situ remediation performance (e.g., ISCO, bioremediation)
• Drinking water supply well assessment under SDWA guidelines

FAQ

Can the Redi-Flo2 be used for both purging and sampling during a single well visit?

Yes. Its wide dynamic flow range and stable low-flow performance eliminate the need to switch pumps, reducing field time and contamination risk.
Is calibration required before each sampling event?

Field verification using a certified flow meter is recommended per ASTM D6771; full recalibration is performed annually or after component replacement.
Does the pump meet GLP/GMP requirements for laboratory-conducted environmental testing?

When deployed within a documented SOP framework—including logbook entries, maintenance records, and traceable calibration—its operational consistency supports GLP-compliant data generation.
What maintenance intervals are recommended for extended field deployment?

Tubing replacement every 200–300 operating hours; full inspection and O-ring replacement every 6 months or after 500 cumulative hours.
Is technical support available outside China?

SAIL HERO provides multilingual engineering support via regional partners in Southeast Asia, the Middle East, and Latin America; firmware updates and troubleshooting guides are accessible through secure customer portal.