Hefei Kejing GZK-101 High-Vacuum Pumping System

Overview

The Hefei Kejing GZK-101 High-Vacuum Pumping System is an engineered vacuum generation and control platform designed for laboratory-scale applications requiring stable, clean, and reproducible low-pressure environments. It operates on a two-stage vacuum architecture: primary roughing via a 2TW-4C dual-stage rotary vane mechanical pump, followed by direct system evacuation to a base pressure of 1.0 × 10⁻¹ Pa—sufficient for thermal processing, thin-film deposition pre-evacuation, outgassing studies, and inert-atmosphere sample handling. Constructed entirely from electropolished 304 stainless steel, the system minimizes surface area contamination, suppresses particle shedding, and ensures long-term corrosion resistance under repeated exposure to moisture, solvents, and process vapors. All flanged connections utilize KF25 quick-release couplings with fluorocarbon (FKM) elastomer seals, enabling rapid assembly while maintaining hermetic integrity per ISO 2859-1 sampling standards. The integrated digital vacuum gauge provides real-time, traceable pressure monitoring across seven decades (10⁻⁴–1000 Torr), supporting both coarse and fine vacuum regime characterization.

Key Features

• Stainless steel vacuum chamber interface and piping—fully electropolished to Ra ≤ 0.4 µm surface finish, reducing adsorption sites and facilitating cleaning validation.
• Dedicated pre-evacuation circuit with automatic sequencing logic: mechanical pump initiates first, then isolates via KF25 manual valve upon reaching ~10 Pa, minimizing backstreaming during high-vacuum transitions.
• Low-leakage mechanical architecture: welded stainless joints certified to leak rates < 1 × 10⁻⁹ Pa·m³/s (per ISO 10571 helium mass spectrometry testing); KF25 isolation valve rated ≤ 5 × 10⁻⁹ Pa·m³/s.
• Power management compliant with IEC 61000-4 electromagnetic compatibility requirements; built-in thermal cutoff at 85 °C prevents motor overload under extended duty cycles.
• Modular configuration—designed for integration with muffle furnaces, gloveboxes, or custom vacuum chambers via standardized KF25 or CF flanges (adapters available separately).

Sample Compatibility & Compliance

The GZK-101 is compatible with solid, powder, and inert-gas-purged samples processed in muffle furnaces or annealing stations operating up to 1200 °C. Its all-metal, solvent-resistant construction supports GLP-compliant workflows where residue-free vacuum integrity is mandatory—e.g., pre-bake steps prior to sintering or calcination. The system meets environmental safety criteria aligned with ISO 14001:2015, including RoHS-restricted substance declaration and mercury-free pump oil specification. Occupational health compliance follows OHSAS 18001:2007 principles: noise emission < 58 dB(A) at 1 m, no volatile organic emissions during operation, and grounded chassis design per IEC 61000-6-3 immunity standards. While not intrinsically rated for explosive atmospheres, it may be deployed in Zone 2 classified laboratories when installed per IEC 60079-14 guidelines.

Software & Data Management

The GZK-101 operates as a standalone hardware platform without embedded firmware or proprietary software. Pressure readings from the digital vacuum gauge are analog-output enabled (0–10 V DC) for connection to third-party data acquisition systems (e.g., LabVIEW, MATLAB Data Acquisition Toolbox, or Siemens Desigo CC). Optional RS-485 Modbus RTU interface kits support integration into centralized facility monitoring networks compliant with ISO/IEC 17025 Clause 5.9. Audit trails—including timestamped pressure logs, pump runtime hours, and valve actuation events—can be generated externally using validated CSV export protocols. No FDA 21 CFR Part 11 electronic signature capability is included; however, the system’s deterministic mechanical behavior and calibrated gauge output enable full traceability when paired with qualified external logging hardware.

Applications

• Pretreatment vacuum stabilization of ceramic precursors prior to high-temperature sintering in muffle furnaces.
• Residual gas analysis (RGA) preparation: achieving stable base pressure for subsequent mass spectrometer coupling.
• Controlled atmosphere annealing—evacuating air before backfilling with N₂, Ar, or forming gas (5% H₂/95% N₂).
• Moisture and volatiles removal from hygroscopic powders (e.g., LiCoO₂, MOFs) under < 10⁻¹ Pa conditions.
• Calibration reference setup for secondary vacuum sensors used in ISO 10110 optical component coating lines.

FAQ

What vacuum level can the GZK-101 achieve without additional pumping stages?
The system reaches a base pressure of 1.0 × 10⁻¹ Pa using only the integrated 2TW-4C mechanical pump—sufficient for most furnace degassing and inert-gas exchange protocols.
Is the stainless steel tubing passivated per ASTM A967?
Yes—electropolishing is performed to ASTM A967 Method A (nitric acid-based) specifications, with post-treatment copper sulfate test verification per QQ-P-35C Type II Class 1.
Can this unit be operated continuously for >8 hours?
Rated for continuous operation up to 12 hours at ambient ≤ 28 °C; extended use requires periodic cooling intervals and oil level verification per manufacturer maintenance schedule.
Does the digital vacuum gauge include NIST-traceable calibration documentation?
Calibration certificate (ISO/IEC 17025-accredited) is provided with each gauge; recalibration interval recommended every 12 months or after 2000 operational hours.
Are spare KF25 FKM seals supplied with initial delivery?
One set of replacement fluorocarbon O-rings (size KF25, hardness 75 Shore A) is included in the standard accessory kit.