EQ Pure Water Cartridge Kit (1×MEPAK, 1×QUPAK, 1×GAPAK, 1×Vent Filter)

Overview

The EQ Pure Water Cartridge Kit (Model CYEQ700XPKIT) is a purpose-engineered consumable assembly designed for integration into Deepflow ultra-pure water (UPW) systems used in analytical laboratories, pharmaceutical QC environments, and semiconductor-grade water purification loops. This kit comprises four functionally distinct, pre-validated ion exchange and filtration cartridges—MEPAK (mixed-bed cation/anion resin), QUPAK (quartz-based ultra-purification module with sub-ppq metal removal capability), GAPAK (guard cartridge for particulate and organic scavenging), and a sterile vent filter—to ensure sequential, multi-stage polishing of Type I ultrapure water per ISO 3696:1987 and ASTM D1193-2022 specifications. The system operates under controlled flow dynamics (typically 0.5–2.0 L/min) and is engineered to maintain resistivity ≥18.2 MΩ·cm at 25 °C, total organic carbon (TOC) <1 ppb, and bacterial counts <0.1 CFU/mL—key performance benchmarks required for HPLC mobile phase preparation, ICP-MS calibration, cell culture media formulation, and trace elemental analysis.

Key Features

• Modular, plug-and-play cartridge architecture enabling rapid, tool-free replacement without system depressurization or bypass plumbing.
• MEPAK cartridge utilizes high-capacity, nuclear-grade mixed-bed resin with uniform particle size distribution (<0.4 mm) to maximize deionization efficiency and minimize leaching.
• QUPAK module integrates quartz-fiber matrix impregnated with chelating ligands optimized for selective adsorption of transition metals (e.g., Fe, Cu, Ni) down to sub-part-per-quadrillion (ppq) levels—critical for low-background spectroscopy.
• GAPAK functions as a pre-polishing guard stage containing activated carbon and graded polypropylene depth filters (nominal rating: 0.45 µm → 0.22 µm) to extend downstream cartridge life by removing chlorine, chloramines, colloids, and oxidizable organics.
• Vent filter employs hydrophobic PTFE membrane (0.2 µm rated, integrity-testable per ASTM F838-22) to prevent atmospheric contamination during tank venting while permitting vapor-phase equilibration.
• All cartridges comply with USP TOC requirements and are individually packaged in double-bagged, cleanroom-classified (ISO Class 5) PE/Al laminate pouches with lot-specific CoA documentation.

Sample Compatibility & Compliance

This kit is validated for use with Deepflow CYEQ700-series ultrapure water generators and compatible with feed water meeting ASTM Type II specifications (resistivity ≥1 MΩ·cm, TOC <50 ppb). It supports continuous operation under GLP/GMP-aligned workflows and meets the material compatibility requirements outlined in USP “Water for Pharmaceutical Purposes.” All wetted components conform to FDA 21 CFR Part 177 (food-contact polymers) and EU Regulation EC No. 1935/2004. Cartridge service life is monitored via integrated pressure differential sensors and conductivity trending; typical replacement intervals range from 6–12 months depending on feed water quality and daily usage volume (≤100 L/day recommended for full specification retention).

Software & Data Management

While the CYEQ700XPKIT itself is a passive consumable set, it interfaces with Deepflow’s CYEQ700 system controller firmware (v3.2+), which logs cartridge installation timestamps, cumulative runtime, inlet/outlet conductivity profiles, and real-time TOC trend data. Audit trails are stored locally with optional cloud synchronization (via encrypted MQTT protocol) compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, user access controls, and immutable record retention for ≥36 months. System-generated maintenance alerts trigger based on predefined conductivity drift thresholds (>0.05 µS/cm increase over baseline) or ΔP >2.5 bar across any cartridge stage.

Applications

• HPLC and UHPLC mobile phase preparation where ionic residue must be below detection limits for gradient elution stability.
• ICP-MS and ICP-OES sample dilution and standard preparation requiring sub-ppt metal background.
• Preparation of electrophysiology buffers and single-cell sequencing reagents sensitive to endotoxin and nucleases.
• Final rinse water in cleanroom wafer fabrication processes adhering to SEMI F63 standards.
• Calibration of online conductivity and TOC analyzers used in pharmaceutical water-for-injection (WFI) monitoring loops.

FAQ

What is the maximum allowable feed water hardness for optimal MEPAK service life?
Feed water hardness should not exceed 2 ppm CaCO₃ equivalent; higher values necessitate upstream softening or reverse osmosis pretreatment.
Can the QUPAK cartridge be regenerated onsite?
No—QUPAK is a single-use, non-regenerable module due to irreversible metal-ligand binding kinetics and stringent cleanroom packaging requirements.
Is the vent filter sterilizable by autoclaving?
No—autoclaving compromises PTFE membrane integrity; steam sterilization is not supported. Sterility is maintained via gamma irradiation (25 kGy) during manufacturing.
Does this kit include system validation documentation?
Yes—each kit ships with a Certificate of Conformance (CoC), extractables testing report (per USP ), and a batch-specific Certificate of Analysis (CoA) covering conductivity, TOC, and microbial limits.
How is cartridge sequence integrity ensured during installation?
Cartridges feature keyed bayonet fittings and color-coded housings (blue = MEPAK, green = QUPAK, yellow = GAPAK, red = Vent Filter) aligned with Deepflow’s standardized UPW flow path schematic.