Precise determination of the temperature at which grease changes from semi-solid to liquid
Product Overview
The DFYF-303 is designed according to GB/T 4929 (equivalent to ASTM D566 – Dropping Point of Lubricating Grease). It measures the dropping point of a lubricating grease – the temperature at which the first drop of grease falls from a test cup under controlled heating conditions. This parameter is a key indicator of a grease’s high-temperature performance.
This instrument is widely used in grease manufacturing quality control, R&D laboratories, and industries such as automotive, machinery, and metallurgy where grease performance matters.
Key Technical Specifications
Parameter | Value |
Power supply | AC220V, 50Hz |
Heating power | 300W |
Temperature adjustment | Continuously variable (0–220V) |
Stirring motor power | 6W |
Features & Design Highlights
1. Standard compliance
Fully compliant with GB/T 4929, ensuring reliable and comparable test results.
2. Precise & adjustable heating control
A modern solid-state voltage regulator allows smooth adjustment of the heating tube voltage (0–220V continuously).
A built-in voltmeter on the front panel shows the real-time voltage, enabling the operator to precisely control the heating power and follow the required heating rate.
3. Double-glass bath – safe and energy-efficient
The tester features a double-walled glass bath. The inner bath holds the oil, while the outer bath provides thermal insulation and protection against accidental contact with hot surfaces – improving operator safety and reducing heat loss.
4. Compact design, easy to operate
The instrument has a neat, space-saving layout and a simple user interface, suitable for daily laboratory use.
Why Choose the DFYF-303?
Accurate power control – Solid-state regulator with voltmeter feedback ensures repeatable heating.
Safer operation – Double-glass bath minimizes burn risk and conserves energy.
Low maintenance – No complex electronics; easy to clean and maintain.
Broad application – Ideal for all common grease types (calcium, lithium, complex lithium, etc.). A standard tool for any grease laboratory.
Typical Test Procedure (Brief)
Fill the dropping point cup with the grease sample and insert the thermometer.
Place the cup into the double-glass oil bath and start the stirrer.
Adjust the heating voltage to raise the temperature at the standard-specified rate.
Observe and record the temperature at which the first drop of grease falls from the cup – that is the dropping point.
About Dalian Analytical Instrument Factory
With nearly 40 years of specialized experience, Dalian Analytical Instrument Factory is a leading manufacturer of petroleum product analysis equipment. We hold ISO 9001 (2000) certification, ensuring reliable quality in design, production, and after-sales service. Our portfolio includes over 100 types of instruments for gasoline, kerosene, diesel, lubricating oils, greases, and general laboratory applications. By combining deep industry knowledge with continuous innovation, we deliver high-performance analytical solutions to customers worldwide.
Contact Us
Sales email: [lovecarlos2000@gmail.com]
24-hour hotline: +86 15941156556
We welcome inquiries for standard models or custom solutions. Let us help you improve your grease quality control.
