Zhengzhou Great Wall Scientific Industrial & Trading Co., Ltd. VT-40x Cryogenic Vapor Trap

Overview

The Zhengzhou Great Wall Scientific Industrial & Trading Co., Ltd. VT-40x Cryogenic Vapor Trap is a purpose-engineered cold trap designed for integration with vacuum drying ovens, rotary evaporators, freeze dryers, and low-pressure concentration systems. It operates on the principle of cryogenic condensation—utilizing a closed-cycle refrigeration system to maintain a stable, precisely controlled low-temperature surface within the trap chamber. This enables efficient phase transition of solvent vapors (including water, ethanol, acetone, ethyl acetate, and other common laboratory volatiles) from gaseous to solid or liquid states before they reach the vacuum pump. By intercepting condensable vapors upstream of the pump, the VT-40x significantly extends pump service life, reduces oil contamination, improves ultimate vacuum performance, and minimizes environmental emissions—supporting compliance with occupational health and laboratory sustainability requirements.

Key Features

• Cryogenic operation down to −40 °C (no-load), achieved via a self-contained R404A refrigeration circuit with multi-stage thermal regulation.
• Dual capture configurations: direct-contact stainless steel trap chamber (304-grade, 06Cr19Ni10) for aqueous and ethanol-based applications; optional borosilicate glass cold finger assembly for compatibility with acidic or aggressive organic solvents.
• Real-time digital temperature monitoring using a calibrated Pt100 resistance thermometer, enabling precise process observation and synchronized vacuum system control.
• Intelligent safety architecture including compressor delay protection, thermal overload cutoff, current-limiting circuitry, and high-pressure interlock—designed for unattended operation in GLP-compliant environments.
• KF25 vacuum flange interface ensures standardized, leak-tight connection to common laboratory vacuum manifolds and pumps (e.g., diaphragm, scroll, or oil-sealed rotary vane types).
• Robust mechanical design: reinforced chassis, vibration-damped compressor mounting, and optimized heat dissipation for continuous-duty operation under ambient conditions of 5–35 °C and ≤70% relative humidity.

Sample Compatibility & Compliance

The VT-40x accommodates a broad spectrum of volatile species encountered in pharmaceutical lyophilization, battery electrode drying (e.g., cathode/anode slurry solvent removal), capacitor moisture scavenging, and fine chemical synthesis. Its 304 stainless steel chamber is chemically resistant to water, alcohols, and mild polar organics; the optional glass condenser extends compatibility to hydrochloric acid vapor, nitric acid fumes, chlorinated solvents, and ester-based electrolytes. While not certified to ISO/IEC 17025 or ASTM E2915 as a standalone analytical instrument, the unit supports adherence to Good Manufacturing Practice (GMP) and Good Laboratory Practice (GLP) workflows by enabling traceable vapor removal, reducing cross-contamination risk, and facilitating audit-ready documentation when integrated into validated vacuum processes per FDA 21 CFR Part 11–compatible control systems.

Software & Data Management

The VT-40x operates as a stand-alone hardware module with local digital setpoint and readout functionality. It does not include embedded firmware or network connectivity; however, its analog temperature output (0–10 V or 4–20 mA, configurable upon request) allows seamless integration into centralized SCADA, LabVIEW, or DeltaV environments. When paired with third-party data loggers or PLCs, users can record time-stamped temperature profiles, correlate trap performance with vacuum ramp rates, and generate electronic batch records compliant with 21 CFR Part 11 requirements—including user authentication, audit trails, and electronic signatures—when deployed within validated infrastructure.

Applications

• Vacuum-assisted drying of lithium-ion battery electrodes and supercapacitor foils, where residual NMP, DMF, or water must be removed below 100 ppm without thermal degradation.
• Cryo-trapping during lyophilization cycle development to quantify sublimation front dynamics and prevent pump oil backstreaming into sterile chambers.
• Protection of high-vacuum turbomolecular pumps in surface science instrumentation (e.g., XPS, AES) against hydrocarbon and water vapor ingress.
• Condensation of volatile reaction byproducts (e.g., HCl, SO₂, acetic anhydride vapors) in small-scale organic synthesis under reduced pressure.
• Pre-cooling function: the chamber may serve as a −40 °C pre-chill bath for sample conditioning prior to cryo-milling or low-temperature spectroscopy.

FAQ

Can the VT-40x be used with corrosive gases such as hydrogen chloride or sulfur dioxide?

Yes—when equipped with the optional borosilicate glass cold finger assembly, the unit provides full compatibility with acidic and halogenated vapors. The stainless steel chamber is not recommended for prolonged exposure to strong acids.
Is the temperature sensor calibrated and traceable to national standards?

The factory-installed Pt100 sensor meets IEC 60751 Class B tolerance (±0.3 °C at 0 °C). Calibration certificates with NIST-traceable reference are available as an optional add-on.
What vacuum pump types are compatible with the KF25 port?

The KF25 interface supports direct connection to diaphragm pumps (up to 1.5 m³/h), scroll pumps (up to 3 m³/h), and single-stage rotary vane pumps. For turbomolecular or diffusion pumps, a secondary foreline trap is recommended.
Does the unit meet CE or UL safety certification requirements?

The VT-40x complies with GB 4793.1–2019 (China’s equivalent to IEC 61010-1) for electrical safety. CE marking is available upon request for EU export, subject to additional EMC testing per EN 61326-1.
Can the trap chamber be cleaned in situ without disassembly?

Yes—the 304 stainless steel chamber features smooth electropolished internal surfaces and a bottom drain port, enabling solvent rinsing and nitrogen purging between runs. Glass components are removable for ultrasonic cleaning.