HUANKONG GHD-ZY2001 Transfer Gas Bag Sampler
| Brand | HUANKONG |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | GHD-ZY2001 |
| Instrument Type | Multifunctional Gas Transfer Sampler |
| Maximum Sample Transfers per Cycle | 1 |
| Minimum Transfer Volume | 200 mL |
| Adjustable Transfer Volume Range | ≥1000 mL (from 3 L SUMMA® canister) |
| Vacuum Pressure Range | −40 kPa to 0 kPa |
| Vacuum Control Accuracy | < ±0.5 kPa |
| Positioning Repeatability | < 0.5 mm |
| Motion Control | Motorized Automated Actuation |
| Tubing Material | PFA and PTFE |
| Check Valve Integrated | Yes |
| Structural Material | Electropolished Stainless Steel (316L) |
| Compliance | HJ 604–2017 |
| Compatible Canisters | 3 L, 6 L, and 15 L SUMMA®-type electropolished stainless steel canisters |
| Compatible Gas Bags | 200 mL and 300 mL Tedlar® or fluorinated ethylene propylene (FEP)-lined bags |
Overview
The HUANKONG GHD-ZY2001 Transfer Gas Bag Sampler is an automated, portable gas transfer device engineered for quantitative, pressure-stable transfer of volatile organic compounds (VOCs) and non-methane hydrocarbons (NMHC) from electropolished SUMMA® canisters to fluoropolymer-lined gas sampling bags. It operates on the principle of vacuum-assisted rapid closure—drawing a precisely controlled negative pressure to initiate flow while maintaining near-isobaric conditions throughout transfer. This ensures minimal analyte loss, no pressure-induced fractionation, and preservation of original sample integrity—critical for regulatory-compliant ambient air, stack emission, and fugitive emission monitoring. Unlike conventional syringe or pressurized transfer methods, the GHD-ZY2001 eliminates mechanical compression, thermal perturbation, and adsorptive surface contact beyond the validated flow path.
Key Features
- Engineered for compliance with HJ 604–2017 “Determination of Non-Methane Hydrocarbons in Ambient Air—Gas Chromatography Method”, supporting NMHC quantification workflows in Chinese environmental monitoring laboratories.
- Integrated electropolished 316L stainless steel manifold and PFA/PTFE fluidic pathway—minimizing adsorption of polar VOCs (e.g., formaldehyde, acetaldehyde) and preventing memory effects across sequential transfers.
- Motor-driven precision actuation system with sub-millimeter positioning repeatability (< 0.5 mm), ensuring consistent valve timing and seal engagement during vacuum initiation and termination cycles.
- Built-in bidirectional check valve assembly prevents backflow contamination between canister and bag—eliminating cross-sample carryover without requiring purge gas or active venting.
- Low-power, battery-compatible design (optional external 12 V DC input) enables field-deployable operation; unit mass < 4.2 kg with integrated carrying handle and ruggedized housing.
Sample Compatibility & Compliance
The GHD-ZY2001 supports standardized environmental sampling protocols involving 3 L, 6 L, and 15 L SUMMA® canisters per EPA TO-14A/TO-15 specifications. It accommodates 200 mL and 300 mL fluorinated gas bags (Tedlar®, FEP, or PFA-laminated) rated for ≤10 ppm VOC storage stability over 30 days at 25 °C. All wetted materials conform to ASTM D5504–22 requirements for sulfur compound inertness. The vacuum control architecture meets ISO 5725-2:2019 accuracy criteria for volumetric transfer systems used in reference method validation. No internal lubricants or elastomers contact the sample stream—ensuring compatibility with GLP audit trails and method validation documentation per CNAS-CL01:2018.
Software & Data Management
The instrument operates in standalone mode with tactile push-button interface and real-time vacuum pressure display (digital LCD). While it does not feature embedded data logging or PC connectivity, its deterministic mechanical sequence enables full traceability when paired with laboratory information management systems (LIMS) via manual entry of batch IDs, canister lot numbers, transfer timestamps, and operator signatures. Vacuum setpoints and hold durations are factory-calibrated and documented in the Certificate of Conformance (CoC), supporting 21 CFR Part 11–aligned procedural controls when implemented within SOP-driven QA/QC frameworks.
Applications
- Preparatory transfer of ambient or source emission samples from SUMMA® canisters to gas bags prior to GC-FID or GC-MS analysis for NMHC, BTEX, and C2–C10 hydrocarbon speciation.
- Calibration standard preparation—dilution of certified reference gases into flexible bags for dynamic spiking or instrument calibration verification.
- Field-based sample splitting: generating replicate bag aliquots from a single canister for inter-laboratory comparison studies under CNAS or ILAC-MRA frameworks.
- Supporting EPA Method 25A and ISO 11890-2 workflows where bag-based introduction into direct injection or thermal desorption GC interfaces is required.
FAQ
Does the GHD-ZY2001 require carrier gas or external purge lines?
No. It relies solely on vacuum differential for transfer; no compressed air, nitrogen, or zero-air supply is needed.
Can it be used with 1 L or custom-sized gas bags?
It is validated only for 200 mL and 300 mL standard fluoropolymer bags. Use with non-standard volumes may compromise vacuum control fidelity and volumetric accuracy.
Is the vacuum pressure range adjustable in fine increments?
Yes—vacuum setpoint is digitally tunable in 1 kPa steps across the −40 kPa to 0 kPa range, with closed-loop feedback maintaining stability within ±0.5 kPa tolerance.
What maintenance is required for long-term reliability?
Annual verification of O-ring integrity (Viton®/FFKM), valve seat wear inspection, and calibration of the integrated pressure transducer using NIST-traceable deadweight tester is recommended.
Does it support automated sequence programming for unattended operation?
No—it performs one discrete transfer per manual initiation. It is not designed for multi-step or time-scheduled operation; it functions as a dedicated transfer module within manual or semi-automated lab workflows.
