Deepflow CYTANKPE100 Ultra-Pure Water Storage Tank

Overview

The Deepflow CYTANKPE100 Ultra-Pure Water Storage Tank is a purpose-engineered, polyethylene (PE) based static reservoir designed for integration into laboratory ultra-pure water distribution systems. Unlike recirculating or pressurized storage units, the CYTANKPE100 functions as a passive, gravity-fed or pump-sourced buffer tank—optimized to minimize contamination risk during intermediate storage of Type I ultrapure water (resistivity ≥ 18.2 MΩ·cm at 25 °C, TOC < 5 ppb). Its design adheres to core principles of low-leachability material science and laminar-flow hydraulics, ensuring that stored water maintains its specified purity grade over defined holding periods under controlled environmental conditions. The tank is intended for use downstream of primary purification modules (e.g., reverse osmosis + EDI + UV oxidation + 0.22 µm final filtration) and upstream of point-of-use dispensers or analytical instrumentation requiring stable feed pressure and minimal particulate/ionic recontamination.

Key Features

• Material construction: Food-grade linear low-density polyethylene (LLDPE), certified compliant with USP Class VI and ISO 10993-5 biocompatibility standards—ensuring negligible extractables and non-reactive surface chemistry.
• Double-walled, insulated design with integrated air gap to reduce thermal fluctuation and condensation-induced microbial ingress.
• Integrated 0.22 µm hydrophobic vent filter (PTFE membrane) with validated bacterial retention (≥ log 7 reduction of Brevundimonas diminuta) and automatic moisture trap to prevent back-diffusion.
• Full drain capability via bottom-mounted sanitary tri-clamp outlet (DIN 11851, 1.5″) enabling complete emptying and cleaning-in-place (CIP) compatibility.
• Calibrated level sensing port (4–20 mA output) compatible with SCADA and building management systems for real-time volume monitoring and automated refill control.
• Smooth, electrostatically discharged (ESD-safe) interior surface finish (Ra ≤ 0.4 µm) minimizing biofilm nucleation sites and facilitating validation of cleaning efficacy.

Sample Compatibility & Compliance

The CYTANKPE100 is validated for continuous storage of ASTM Type I ultrapure water and meets functional requirements outlined in ISO 3696:1987 (Water for analytical laboratory use) and CLSI EP23-A guidelines for water system qualification. It supports compliance workflows for GLP and GMP environments when deployed within a documented water system lifecycle management framework—including IQ/OQ/PQ protocols, periodic microbial and endotoxin testing, and traceable calibration of level and temperature sensors. While the tank itself does not generate purified water, its design facilitates adherence to FDA 21 CFR Part 11 data integrity requirements when paired with compliant supervisory software logging fill/drain cycles, ambient temperature, and vent filter service history.

Software & Data Management

The CYTANKPE100 operates as a standalone mechanical component but interfaces seamlessly with third-party water system controllers via analog (4–20 mA) and digital (Modbus RTU) outputs. Optional integration kits support connection to Deepflow’s AquaTrack™ Water System Management Platform, enabling centralized visualization of tank status, predictive maintenance alerts for vent filter replacement (based on cumulative exposure time and differential pressure), and audit-trail generation for all operational events. All data logs are timestamped, user-authenticated, and exportable in CSV or PDF formats for regulatory submission.

Applications

• Buffer storage in centralized ultrapure water networks serving multiple laboratories or cleanroom zones.
• Stabilization of flow and pressure prior to sensitive applications such as HPLC mobile phase preparation, ICP-MS sample introduction, and cell culture media formulation.
• Temporary hold vessel during scheduled maintenance of upstream purification units—maintaining uninterrupted supply to critical endpoints.
• Integration into pharmaceutical QC labs where water-for-injection (WFI)-adjacent storage must demonstrate low endotoxin carryover and validated sanitization cycles (e.g., ozone or hot water circulation).
• Research facilities requiring long-term stability assessment of ultrapure water quality parameters (resistivity, TOC, particle count) under static storage conditions.

FAQ

Is the CYTANKPE100 suitable for storing WFI (Water for Injection)?
No—it is engineered for ASTM Type I ultrapure water, not pharmacopeial-grade WFI. WFI requires validated sterilizing-grade storage with steam sanitization capability and dynamic circulation; the CYTANKPE100 is a static, non-sterilizable reservoir.
What is the recommended maximum storage duration for ultrapure water in this tank?
Under controlled lab conditions (20–25 °C, filtered air environment, regular vent filter replacement), storage up to 72 hours is supported with documented purity retention. Longer durations require site-specific validation per ISO 22196 or ASTM D5667.
Can the tank be retrofitted with a UV lamp or recirculation loop?
Not without voiding certification. The CYTANKPE100 is validated only as supplied. Any modification compromises material compatibility and microbial control claims.
Does it include a calibration certificate for the level sensor?
Yes—each unit ships with a factory-issued NIST-traceable calibration report for the 4–20 mA level transmitter, valid for 12 months from date of shipment.
What cleaning agents are approved for CIP procedures?
0.5% v/v phosphoric acid or 1% w/v sodium hydroxide solutions at ambient temperature; avoid chlorine-based oxidants and organic solvents which may degrade PE integrity.