Experimental Cheese Vat GL-20

Overview

The GL-20 Experimental Cheese Vat is a precision-engineered laboratory-scale cheese-making system designed to replicate and optimize traditional and industrial cheese production processes under controlled, repeatable conditions. Based on the fundamental principles of dairy enzymology and thermal mass transfer, the GL-20 enables researchers, product developers, and quality assurance specialists to conduct rigorous process validation—from milk standardization and starter culture inoculation to rennet-induced coagulation, curd cutting, scalding, salting, and whey separation. Its triple-walled stainless steel vat architecture supports precise thermal management via jacketed water circulation driven by a magnetically coupled pump, ensuring uniform heat distribution across the entire 20 L working volume. This design eliminates localized hot spots and supports ISO 22000-aligned hygiene practices through fully drainable, crevice-free construction and food-grade surface finish (Ra ≤ 0.8 µm).

Key Features

• Triple-layer insulated stainless steel vat (AISI 316L contact surfaces) with removable, hygienically designed agitator shaft and impeller
• Adjustable agitation system: 90 W motor with dual-speed control—rotational speed 0–60 rpm (continuous), oscillatory motion 0–90 cycles/min (programmable waveform)
• Integrated magnetic-drive recirculation pump (max. 20 L/min) for jacket temperature uniformity and rapid thermal response
• Wide-range temperature control: ambient +5°C to 90°C, ±0.3°C stability over full load, PID-regulated with PT100 sensor redundancy
• Digital pH monitoring: calibrated food-grade electrode (0–14 pH, ±0.02 pH accuracy), auto-compensated for temperature, with RS-485 output
• Dual-axis curd cutting system: one horizontal stainless steel wire blade and one vertical stainless steel wire blade, manually adjustable depth and spacing
• Modular whey drainage assembly with perforated stainless steel false bottom and gravity-assisted outlet valve
• Two interchangeable cheese molds: 0.5 kg and 1.0 kg capacity, with integrated venting and pressure-release mechanisms
• Full electrical safety compliance: IP54 enclosure rating, CE-marked power supply (220–240 V AC, 50 Hz, 3 kW), grounded chassis and EMI-filtered input

Sample Compatibility & Compliance

The GL-20 accommodates raw, pasteurized, or standardized bovine, caprine, and ovine milks—including high-fat, low-lactose, and ultrafiltered variants—without modification. All wetted parts meet EC No. 1935/2004 and FDA 21 CFR §177.1520 requirements for repeated-use food contact materials. The system supports GLP-compliant documentation workflows: time-stamped temperature/pH logs (via optional USB/RS-232 interface) are exportable in CSV format for audit trails. It is routinely deployed in laboratories adhering to ISO/IEC 17025 accreditation standards and aligns with critical steps referenced in Codex Alimentarius Standard CXS 221-2003 (Cheese) and IDF Standard 168:2012 (Determination of Coagulation Time).

Software & Data Management

While the GL-20 operates as a stand-alone instrument with intuitive front-panel controls, its digital sensors support external data acquisition via Modbus RTU or analog 4–20 mA outputs. When connected to a host PC (Windows/Linux/macOS), real-time temperature and pH profiles can be logged at user-defined intervals (1 s to 5 min resolution) using open-protocol software compatible with LabVIEW, MATLAB, or custom Python scripts. All measurement data include embedded metadata: timestamp (ISO 8601), sensor ID, calibration date, and operator code. Optional firmware upgrade enables 21 CFR Part 11-compliant electronic signatures and audit trail generation for regulated R&D environments.

Applications

• Strain screening and starter culture performance evaluation under defined thermal-pH trajectories
• Optimization of rennet dosage, coagulation time, and cut size for texture and syneresis control
• Scalding profile development (e.g., gradual vs. stepwise temperature ramping) for Mozzarella elasticity or Cheddar cheddaring kinetics
• Whey composition analysis linked to drainage rate, pH drop, and mechanical agitation intensity
• Scale-down validation for pilot-plant or commercial vat transitions (5–500 L range supported via custom engineering)
• Teaching modules in food science curricula covering dairy microbiology, enzymology, and process engineering fundamentals

FAQ

What is the minimum and maximum batch volume the GL-20 can process?
The nominal working capacity is 20 L, with validated operational repeatability from 10 L (minimum recommended fill level) to 20 L (full capacity).
Can the GL-20 be used for acid-coagulated cheeses like paneer or queso fresco?
Yes—the system supports both enzymatic (rennet-based) and acid-induced coagulation; temperature and pH control allow precise titration of lactic acid or food-grade acids (e.g., citric, acetic) during ripening.
Is third-party calibration documentation available for the pH and temperature sensors?
Factory calibration certificates (traceable to NIST and PTB standards) are provided with each unit; on-site recalibration services are available upon request.
Does the system comply with sanitary design principles per 3-A SSI standards?
While not 3-A certified as a complete assembly, all product-contact components conform to 3-A SSI 01–05 (2020) dimensional and surface finish criteria, including crevice-free welds, 15° minimum drainage angles, and accessible clean-in-place (CIP) pathways.
Can the agitation pattern be programmed to simulate specific industrial vat motions (e.g., helical sweep or intermittent pulsing)?
The controller supports user-defined agitation sequences via optional programmable logic module (PLM-GL), enabling timed start/stop, ramped speed profiles, and synchronized oscillation bursts.