DFYF-101IV Petroleum Products Distillation Tester

– Dual-Column Independent Control, Accurate Distillation Range Analysis, Compliant with GB/T 6536 / ASTM D86

I. Applicable Standard & Application

Strictly designed and manufactured in accordance with GB/T 6536 “Standard test method for distillation characteristics of petroleum products at atmospheric pressure” and ASTM D86. It is specifically used for distillation range determination of gasoline, kerosene, diesel, solvent oils, naphtha, and other petroleum products. This instrument is widely applied in petroleum refineries for distillation quality control, regulatory compliance testing by inspection authorities, incoming fuel acceptance by end-users, and commissioned testing by third-party laboratories. It is essential equipment for evaluating fuel volatility and fractional composition.

II. Key Technical Specifications

III. Key Features

1. Dual-Column Independent Design – Flexible & Efficient

The instrument is equipped with two independent heating systems (1000W each), allowing two different samples to be tested simultaneously or duplicate tests of the same sample. Both heating channels are independently adjustable without mutual interference, greatly improving laboratory throughput.

2. High-Quality Infrared Heating – Safe & Economical

Adopts infrared heating quartz glass tube type heaters, featuring high thermal efficiency, rapid and uniform temperature rise. The quartz glass tube is oxidation-resistant and oil-splash-proof – even if the sample bumping or splashing occurs, the heating element is not easily damaged, ensuring safe and durable operation.

3. Precise Condensation & Temperature Control System

The condenser is of double-bend design (front single-bend condenser) with a long cooling path for high condensation efficiency, ensuring complete recovery of distillate and minimizing loss.

The bath is made of stainless steel, corrosion-resistant and long-lasting. Equipped with a cooling system (cooling power 300 W), the temperature control range is 0～60℃ with an accuracy of ±0.1℃, meeting the requirements of different petroleum products for condenser bath temperature.

4. Adjustable Heating Power & Synchronized Voltage Display

Heating power is continuously adjusted by a solid-state voltage regulator, providing smooth and reliable temperature rise control. A synchronized voltage display meter is mounted on the panel – clear and intuitive – allowing the operator to precisely adjust the heating intensity according to the standard-required distillation rates (e.g., 2～5 ml/min or 4～5 ml/min, etc.) and avoiding instability due to voltage fluctuations.

5. Convenient Heating Chamber Design

The heating chamber observation window is openable, making it easy to observe the sample condition and residue inside the flask at any time. It is also equipped with a heating and constant temperature device to prevent fogging on the glass. The distance between the heater and the bottom of the distillation flask is manually adjustable, accommodating different flasks and varying heating requirements for flexible operation.

6. Safe & Reliable – Easy Maintenance

The whole unit is compactly constructed, and the electrical system includes overload protection. The quartz heating tubes are easy to replace, and the stainless steel bath is simple to clean. The condenser tube can be easily disassembled for regular cleaning of internal carbon deposits or gums, maintaining high condensation efficiency.

IV. Test Principle & Operation Highlights

Principle (brief):
A 100 ml sample is distilled under specified heating conditions. The vapor passes through the condenser and is collected into a graduated cylinder. Record the temperature when the first drop of condensate falls (initial boiling point, IBP) and the temperatures at each 10%, 20%, … 90%, 95% of recovered volume, as well as the final boiling point (FBP). The distillation curve reveals the volatility and fraction composition of the sample.

Operational advantages:

Dual-column independent control allows simultaneous testing of two samples with different distillation ranges, e.g., gasoline and diesel.

Solid-state voltage regulator plus voltage meter makes it easy to meet the strict heating rate requirements of GB/T 6536 / ASTM D86 (0–10% recovery: 2–5 ml/min; 10–90% recovery: 4–5 ml/min; 90% to FBP: 3–4 ml/min).

Openable observation window and adjustable heater-flask distance facilitate handling of high-residue or foaming samples.

V. Typical Applications

Petroleum refineries: Distillation range quality control and process adjustment for gasoline, kerosene, diesel, naphtha, etc.

Quality inspection authorities: Regulatory compliance testing of commercial automotive gasoline and diesel.

Fuel end-users: Acceptance testing of incoming fuel for power plants, airlines, marine vessels, etc.

Solvent oil manufacturers: Determination of distillation range for various solvent oils.

Third-party testing laboratories: Commissioned distillation testing and reporting.

VI. Product Advantages Summary

VII. Company Qualification & Service Guarantee

We are a high-tech enterprise with over forty years of experience in R&D and manufacturing of petroleum testing instruments, certified to ISO 9001:2015. Each DFYF-101IV unit undergoes strict heater performance testing, temperature control system calibration, and safety inspection before delivery, and a traceable calibration certificate is provided. We offer:

Equipment installation, commissioning & operation training

Testing method development & standard consulting

Long-term after-sales support & spare parts supply

Instrument recalibration & maintenance services

VIII. Request Quotations & Technical Documentation

For detailed quotations, complete technical specifications (including drawings & parts list), standard operating procedures (SOP), and 3Q validation documents, please contact:

�� Sales Email: lovecarlos2000@gmail.com
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