SDSCY16 Miniature Oxygen Charging Device for Coal Calorimetry
| Brand | Sundy |
|---|---|
| Origin | Hunan, China |
| Model | SDSCY16 |
| Dimensions (max) | Ø43 mm × 82 mm |
| Weight | ~0.4 kg |
| Oxygen Purity Requirement | ≥99.5% (cylinder-sourced only |
| Operating Pressure | 2.8–3.0 MPa (regulated via dedicated pressure-reducing valve) |
| Design Type | Handheld, single-hand operation |
| Construction | Compact, lightweight industrial-grade assembly |
Overview
The SDSCY16 Miniature Oxygen Charging Device is an engineered auxiliary instrument designed exclusively for controlled oxygen pressurization of bomb calorimeter vessels in accordance with ASTM D5865, ISO 1928, and GB/T 213–2008 standards for coal and solid biofuel calorific value determination. It operates on the principle of regulated high-pressure gas transfer—utilizing a precision-machined brass body, stainless steel internal pathways, and a calibrated two-stage pressure regulation system—to deliver consistent, traceable oxygen fill pressures within the critical 2.8–3.0 MPa range required for complete combustion of coal samples in adiabatic or isoperibol bomb calorimeters. Its compact cylindrical form factor and ergonomic grip geometry are optimized for integration into standardized coal testing workflows where bench space is constrained and repeatability across multiple daily calibrations is essential.
Key Features
- Handheld, single-hand operable design enables rapid, fatigue-free charging cycles during high-throughput coal analysis sessions.
- Compact footprint (Ø43 mm × 82 mm) and ultra-light mass (~0.4 kg) facilitate portability between calorimeter stations and field-deployable lab setups.
- Integrated dual-stage pressure regulation ensures stable output at 2.8–3.0 MPa, minimizing over-pressurization risk and supporting compliance with ISO/IEC 17025 method validation requirements.
- Gas pathway constructed from oxygen-compatible materials (electropolished 316 stainless steel inlet valve, brass main body) to prevent catalytic decomposition or organic residue accumulation.
- Sealing interface engineered to ISO 11143-compliant bomb neck dimensions, ensuring leak-tight mating with standard 100 mL or 300 mL Parr-type oxygen bombs used in coal calorimetry.
- No external power supply required—fully mechanical operation enhances reliability in environments with unstable electrical infrastructure or Class I Division 2 hazardous area considerations.
Sample Compatibility & Compliance
The SDSCY16 is validated for use with all standard oxygen bombs employed in coal proximate/ultimate analysis laboratories, including but not limited to Parr 1341, IKA C 2000, and Sundy SDCM series calorimeters. It complies with the oxygen purity and pressure specifications mandated by national and international coal testing protocols: GB/T 213–2008 (China), ASTM D5865–22 (USA), and ISO 1928:2022 (International). The device explicitly prohibits electrolytic oxygen due to inherent moisture and hydrogen impurity risks that compromise combustion completeness and introduce systematic bias in gross calorific value (GCV) reporting. All components meet oxygen service cleanliness standards per CGA G-4.1 and are compatible with ambient operating temperatures ranging from 10 °C to 35 °C.
Software & Data Management
As a purely mechanical charging tool, the SDSCY16 does not incorporate embedded electronics, firmware, or data logging capabilities. Its operational integrity is maintained through physical calibration verification—performed annually using certified pressure gauges traceable to NIM (National Institute of Metrology, China) or equivalent NMIs. Laboratories implementing GLP or ISO/IEC 17025 quality systems may document usage via manual logbooks or integrate charging events into LIMS through operator-entered metadata (e.g., batch ID, bomb serial number, date/time stamp). No software drivers, USB interfaces, or cybersecurity controls are applicable.
Applications
- Routine oxygen pressurization of calorimeter bombs prior to combustion testing of bituminous, anthracite, lignite, and washed coal samples.
- Calibration verification workflows requiring repeated, identical oxygen fill conditions across reference material (e.g., benzoic acid SRM 39j) and unknown coal samples.
- Mobile or satellite laboratory deployments where weight, size, and power independence are critical constraints.
- Training environments for coal laboratory technicians—its intuitive interface supports rapid competency assessment under ISO/IEC 17025 clause 6.2.5.
- Integration into automated calorimetry lines where pneumatic actuation is coupled with programmable logic controllers (PLCs) for synchronized charging sequences.
FAQ
Why must electrolytic oxygen not be used with the SDSCY16?
Electrolytic oxygen contains residual moisture and hydrogen traces that inhibit complete combustion, leading to unburnt carbon deposits and non-reproducible GCV results—violating ASTM D5865 section 7.2.1.
Is the SDSCY16 compatible with non-coal applications such as biomass or waste-derived fuel testing?
Yes, provided the target fuel matrix falls within ASTM D5865 or ISO 1928 scope and the bomb configuration matches standard oxygen inlet threading (M27×2 or 3/4″-14 NPT).
What maintenance schedule is recommended for long-term accuracy?
Visual inspection before each use; O-ring replacement every 12 months or after 500 charge cycles; annual pressure regulator calibration using NIST-traceable test gauges.
Does the device include a pressure relief mechanism?
No—pressure safety is enforced externally via the calorimeter bomb’s integrated rupture disc and the upstream cylinder regulator’s certified burst rating per CGA V-9.
Can the SDSCY16 be sterilized or cleaned with solvents?
Wipe exterior with isopropyl alcohol only; do not immerse or apply chlorinated or ketone-based solvents, which may degrade elastomeric seals per ASTM F2028.
