Liquefied Petroleum Gas (LPG) Residue Analyzer FDS-0401
| Brand | FuLand / csfriend |
|---|---|
| Origin | Hunan, China |
| Manufacturer Type | Authorized Distributor |
| Country of Manufacture | China |
| Model | FDS-0401 |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Input Power | 800 W |
| Refrigeration Output | 2 × 400 W = 800 W |
| Ambient Temperature Range | Room Temperature to +30 °C |
| Operating Temperature Range | 20 °C to –70 °C |
| Refrigerants | R13 & R502 |
| Cooling Method | Air-Cooled |
| Temperature Control System | PID-Based Digital Thermostat |
| Sample Interface | Quick-Connect Fittings for LPG Cylinders and N₂ Purge Lines |
| Compressor Type | Imported High-Stability Unit |
Overview
The FuLand FDS-0401 Liquefied Petroleum Gas (LPG) Residue Analyzer is a purpose-built instrument engineered for the quantitative determination of non-volatile residue in commercial LPG according to standardized test methods including ASTM D2158, ISO 4256, and GB/T 11174. It operates on the principle of controlled low-temperature condensation and solvent-free evaporation: a precisely metered LPG sample is expanded through a calibrated orifice into a pre-cooled dual-chamber system, where residual hydrocarbons—primarily C₅+ components and trace contaminants such as oil carryover, rust inhibitors, or compressor lubricants—are condensed and collected on chilled surfaces. The residue mass is then gravimetrically determined after solvent-free drying under inert nitrogen purge. Designed for routine QC laboratories in refineries, gas distribution terminals, and third-party testing facilities, the FDS-0401 delivers high reproducibility in residue quantification down to 0.001 mL/100 mL (v/v), supporting compliance with specification limits defined in EN 589 and ASTM D1835.
Key Features
- Integrated dual-bomb architecture enabling simultaneous analysis of two independent LPG samples—reducing turnaround time and improving inter-sample comparability.
- PID-based digital temperature control system with real-time feedback loop, maintaining setpoint stability within ±0.3 °C across the full operating range (20 °C to –70 °C).
- Quick-connect stainless-steel fittings compliant with CGA 750 and ISO 8573-1 Class 2 for secure, leak-tight coupling to standard LPG cylinders and regulated N₂ supply lines.
- Imported hermetic compressors utilizing dual-refrigerant blend (R13/R502) optimized for deep-cold performance at sub-zero temperatures, delivering consistent thermal load capacity without thermal cycling drift.
- Air-cooled condenser design with intelligent fan-speed modulation—minimizing acoustic emission (<58 dB(A)) while ensuring stable heat dissipation under ambient conditions up to +30 °C.
- Modular chamber geometry facilitating full internal access for residue recovery, surface cleaning, and calibration verification per ASTM D2158 Annex A2.
Sample Compatibility & Compliance
The FDS-0401 accommodates standard commercial LPG blends (propane/butane mixtures), HD-5 grade fuel, and refinery-grade feedstocks. It supports both vapor-phase and liquid-phase sampling protocols as specified in ISO 4256 Clause 6. All wetted surfaces are electropolished 316L stainless steel, certified to meet NACE MR0175/ISO 15156 for sour service compatibility. Instrument validation documentation includes factory-assembled IQ/OQ protocols aligned with GLP requirements. When operated with certified analytical balances (0.01 mg readability) and traceable NIST-traceable temperature sensors, the system satisfies data integrity expectations under FDA 21 CFR Part 11 when paired with compliant laboratory information management systems (LIMS).
Software & Data Management
The FDS-0401 operates as a standalone hardware platform with embedded microcontroller-based logic—no PC dependency required for core operation. Temperature setpoints, hold durations, and purge flow profiles are configured via intuitive membrane keypad interface with OLED status display. All operational parameters—including actual chamber temperature logs (recorded at 1-second intervals), compressor duty cycle, and N₂ pressure monitoring—are stored internally for ≥30 days and exportable via USB 2.0 to CSV format. Audit trail functionality records user logins, method changes, and calibration events with timestamp and operator ID—supporting 21 CFR Part 11-compliant electronic records when integrated into validated LIMS environments.
Applications
- Quality assurance of LPG delivered to bulk terminals and retail bottling plants.
- Monitoring residue accumulation in refinery alkylation unit feed streams.
- Verification of LPG purity prior to use in petrochemical synthesis (e.g., propylene oxide production).
- Root-cause investigation of fouling in vaporizers, regulators, and metering skids.
- Contractual dispute resolution between suppliers and end-users under EN 589 Annex B residue clauses.
FAQ
What standards does the FDS-0401 support?
ASTM D2158, ISO 4256, GB/T 11174, EN 589, and JIS K 2512 — all implemented via fixed-geometry cold trap design and gravimetric endpoint detection.
Is nitrogen purge mandatory during analysis?
Yes. Inert nitrogen purge (Grade 5.0, dew point ≤ –70 °C) is required per ASTM D2158 Section 8.3 to prevent oxidation and ensure quantitative volatilization of non-residue fractions.
Can the instrument be used for butane-only or propane-only streams?
Yes. The dual-bomb configuration allows independent optimization of condensation temperature and purge duration for each sample matrix without cross-contamination.
What maintenance intervals are recommended?
Compressor oil inspection every 12 months; refrigerant charge verification every 24 months; cold trap surface passivation and visual inspection before each batch run.
Does the system require external water cooling or chilled water supply?
No. The air-cooled design eliminates dependency on facility cooling utilities—only standard 220 V/50 Hz single-phase power and dry N₂ supply are required.
