The Great Wall VT-2000H Water Vapor and Acid Gas Trap

Overview

The Great Wall VT-2000H Water Vapor and Acid Gas Trap is a purpose-engineered cryogenic condensation system designed for integration with vacuum drying ovens, rotary evaporators, freeze dryers, and low-pressure concentration setups. It operates on the principle of direct refrigeration—utilizing a sealed R404A vapor-compression cycle—to achieve a stable no-load temperature of −40°C. By condensing volatile effluents—including water vapor, low-boiling solvents (e.g., ethanol, acetone), and corrosive vapors (e.g., HCl, acetic acid)—before they reach the primary vacuum pump, the VT-2000H significantly extends pump service life, maintains ultimate vacuum integrity, and reduces environmental emissions in compliance with ISO 14001-aligned laboratory emission control practices. Its dual-capture architecture supports both stainless-steel chamber operation for aqueous and alcoholic systems and optional borosilicate glass cold traps for aggressive acid or halogenated solvent applications—ensuring material compatibility across diverse chemical workflows.

Key Features

• Direct refrigeration system delivering precise, stable cooling down to −40°C with no liquid nitrogen dependency
• Modular capture configuration: interchangeable stainless-steel trap chamber (AISI 304, 06Cr19Ni10) and optional glass cold trap flask for media-specific corrosion resistance
• Digital temperature monitoring with Pt100 RTD sensor and intuitive front-panel display for real-time thermal feedback and process synchronization
• Programmable setpoint control across the full operating range, enabling adaptive timing of vacuum initiation based on condensate stabilization
• Comprehensive safety architecture including delayed compressor startup, electronic overcurrent protection, and independent high-limit thermal cutoff
• Optimized thermal design with insulated chamber walls and low-thermal-mass evaporator geometry for rapid cooldown and minimal temperature drift during extended operation

Sample Compatibility & Compliance

The VT-2000H is engineered for multi-chemistry compatibility under controlled vacuum conditions. The 304 stainless-steel trap chamber meets ASTM A240 requirements for general corrosion resistance in water- and ethanol-based drying processes (e.g., lyophilization pre-chamber conditioning, battery electrode moisture removal). For acidic or halogenated solvent applications—such as Li-ion battery cathode drying with HF-containing atmospheres or pharmaceutical API purification under HCl purge—the optional borosilicate glass cold trap provides inert, non-reactive condensation surfaces compliant with USP and ISO 8573-1 purity class expectations. All electrical components conform to IEC 61010-1:2010 for laboratory equipment safety. The unit operates within ambient limits defined by ISO 15195 for metrological stability (5–35°C, ≤70% RH), supporting GLP/GMP-aligned validation protocols when integrated into regulated drying systems.

Software & Data Management

The VT-2000H operates as a standalone hardware-controlled system without embedded software or network connectivity. Temperature data is displayed locally via a high-resolution digital interface with 0.1°C resolution and ±0.5°C accuracy (calibrated per ISO/IEC 17025 traceable procedures). For laboratories requiring audit-ready records, analog output (0–5 V or 4–20 mA) can be added via optional signal interface module—enabling connection to external PLCs, SCADA systems, or validated LIMS platforms compliant with FDA 21 CFR Part 11 when paired with appropriate electronic signature controls. All operational parameters—including runtime, setpoint history, and fault event logs—are retained in non-volatile memory for post-process review and deviation investigation.

Applications

• Vacuum-assisted drying of lithium-ion battery electrodes and separator films, where residual moisture must be reduced to <20 ppm prior to cell assembly
• Low-pressure concentration of heat-sensitive biologics and natural extracts in pharmaceutical R&D labs
• Cryogenic trapping upstream of turbomolecular pumps in high-vacuum coating systems (e.g., PVD, CVD) to prevent oil backstreaming and hydrocarbon contamination
• Pre-freezing and sub-zero hold stages in pilot-scale freeze dryers used for vaccine formulation development
• Acid gas abatement in semiconductor wafer cleaning lines utilizing HNO₃/HF mixtures
• Condensation recovery of volatile organic compounds (VOCs) during solvent recycling in fine chemical synthesis

FAQ

Can the VT-2000H be used continuously for 24/7 operation?
Yes—it is rated for continuous duty under specified ambient conditions (5–35°C, ≤70% RH) and includes thermal management features such as compressor delay and overtemperature cutoff to ensure long-term reliability.

Is the stainless-steel trap chamber suitable for hydrochloric acid vapor?
No. 304 stainless steel is not resistant to HCl corrosion. For HCl or other strong acids, the optional borosilicate glass cold trap flask must be installed.

What vacuum level can the unit maintain when paired with a typical diaphragm pump?
The VT-2000H itself does not generate vacuum; it functions as a foreline trap. When used with a two-stage diaphragm pump (e.g., 0.5 m³/h, ultimate vacuum ~10 mbar), system base pressure improves by 30–50% due to reduced vapor load on the pump.

Does the unit comply with CE or UL certification requirements?
The VT-2000H meets CE marking requirements per the EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU. UL certification is available upon request for North American markets, subject to regional voltage configuration and third-party testing.

Can custom vacuum port configurations be supplied?
Yes. Standard configuration uses a Ø12 mm flexible hose barb. Custom flanged ports (KF-16, CF-35), VCR fittings, or welded vacuum tubing interfaces are available under OEM engineering support agreements.