JF7325 Lubricating Oil & Grease Evaporation Loss Tester

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JF7325 Lubricating Oil and Grease Evaporation Loss Tester

Product ID：HZSYrhy042

Price: Please inquire PDF Format

Supply Ability:50 SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberJF7325

Brand NameHNJIAFA

Payment TermsTT，PAYPAL，Alibaba.com Pay

JF7325 Lubricating Oil and Grease Evaporation Loss Tester

Product Introduction
The JF7325 Lubricating Oil and Grease Evaporation Loss Tester is designed to determine the evaporation loss of lubricating oils and greases according to GB/T 7325 and ASTM D972.
During the test, a lubricant sample placed in an evaporator is maintained at a specified temperature in a constant-temperature oil bath while heated air passes over the sample surface for 22 hours. The evaporation loss is determined from the mass loss of the sample before and after the test.
The JF7325 is a benchtop petroleum testing instrument integrating an oil bath, airflow control and precision temperature control, suitable for lubricant quality evaluation and laboratory testing.

Performance Features
• Standard-based testing: Designed for evaporation loss testing according to GB/T 7325 and ASTM D972.
• 22-hour test: Heated air passes over the lubricant sample surface for the specified test period.
• Two test units: Supports simultaneous testing of two sample tubes.
• Oil bath heating: Environmental-friendly oil bath heating helps reduce oil fumes and provides effective thermal insulation.
• Wide temperature range: Working temperature from room temperature to 250°C.
• High-precision PID control: Microprocessor-based PID temperature controller with digital display and 0.1°C resolution.
• Pt100 temperature probe: Provides temperature sensing for precise thermal control.
• Precision airflow control: Flowmeter with needle valve provides an airflow range of 0–2 L/min.
• Air filtration: Air filter with glass wool helps filter the incoming air.
• Safety protection: Overheating and low-liquid-level protection help improve operating safety.
• Durable construction: Ceramic-coated stainless-steel structure with stainless-steel heater and cover.
• Integrated benchtop design: Heating bath, flowmeter and temperature-control system are integrated into one laboratory instrument.

Working Principle
A weighed lubricating oil or grease sample is placed in the designated evaporator/sample bottle and positioned in the constant-temperature oil bath.
The instrument heats the bath to the specified test temperature while the PID controller and Pt100 RTD probe continuously monitor and regulate the temperature. Filtered air is introduced through the flowmeter and needle valve and passes over the sample surface for 22 hours.
After the test, the sample is weighed again. The difference between the initial and final sample mass is used to calculate the evaporation loss of the lubricating oil or grease.

Technical Specifications

Parameter	Specification
Model	JF7325
Product Name	Lubricating Oil and Grease Evaporation Loss Tester
Applicable Standards	GB/T 7325, ASTM D972
Test Principle	Evaporation loss by heated air exposure
Test Duration	22 hours
Temperature Control	Imported PID digital temperature controller
Temperature Range	Room temperature to 250°C
Temperature Accuracy	±0.1°C
Heating Method	Oil bath heating
Test Units	2 tubes
Airflow Range	0–2 L/min
Airflow Control	Precision flowmeter with needle valve
Air Filter	Glass wool filter
Temperature Sensor	Pt100 RTD
Heater	Stainless steel heater
Structure	Ceramic-coated stainless steel
Total Power	2.5 kW
Power Supply	AC 220 V / 50 Hz
Timer	Digital timer

Application Scenarios
The JF7325 evaporation loss tester is suitable for laboratory testing and quality evaluation of:
•   Lubricating oils
•   Lubricating greases
•   Automotive lubricants
•   Industrial lubricants
•   Petroleum-based lubricant products
•   Lubricant formulation research
•   Lubricant quality control
•   Petroleum product testing laboratories

JF7325 vs. Basic Evaporation Loss Testing Equipment

Feature	JF7325	Basic Evaporation Testing Setup
Applicable Standards	GB/T 7325, ASTM D972	Depends on setup
Temperature Control	PID digital control	May require manual control
Temperature Accuracy	±0.1°C	Depends on equipment
Heating	Constant-temperature oil bath	Depends on equipment
Test Units	2 tubes	Depends on setup
Airflow Control	0–2 L/min flowmeter + needle valve	May require separate control
Temperature Sensor	Pt100 RTD	Depends on setup
Timer	Digital timer	May require external timing
Safety Protection	Overheat and low-liquid-level protection	Depends on setup
Construction	Ceramic-coated stainless steel	Depends on equipment

FAQ
1. What does the JF7325 evaporation loss tester measure?
It is designed to determine the evaporation loss of lubricating oils and lubricating greases.
2. Which standards does the JF7325 follow?
The instrument is designed for testing according to GB/T 7325 and ASTM D972.
3. How is the evaporation loss determined?
The sample is exposed to heated air for 22 hours at a specified temperature, and evaporation loss is calculated from the sample's mass loss.
4. How many samples can the JF7325 test at one time?
The instrument has two test units for simultaneous testing of two sample tubes.
5. What is the temperature range?
The working temperature range is room temperature to 250°C, with a specified temperature accuracy of ±0.1°C.
6. How is the temperature controlled?
The JF7325 uses an imported PID digital temperature controller with a Pt100 RTD temperature probe.
7. What is the airflow range?
The flowmeter provides an airflow range of 0–2 L/min, with a needle valve for adjustment.
8. What heating method does the instrument use?
It uses oil bath heating, providing a stable constant-temperature environment for the test.
9. Does the instrument have safety protection?
Yes. The supplied specifications include protection against overheating and low liquid level.

FAQ
1. What does the JF7325 evaporation loss tester measure?
It is designed to determine the evaporation loss of lubricating oils and lubricating greases.
2. Which standards does the JF7325 follow?
The instrument is designed for testing according to GB/T 7325 and ASTM D972.
3. How is the evaporation loss determined?
The sample is exposed to heated air for 22 hours at a specified temperature, and evaporation loss is calculated from the sample's mass loss.
4. How many samples can the JF7325 test at one time?
The instrument has two test units for simultaneous testing of two sample tubes.
5. What is the temperature range?
The working temperature range is room temperature to 250°C, with a specified temperature accuracy of ±0.1°C.
6. How is the temperature controlled?
The JF7325 uses an imported PID digital temperature controller with a Pt100 RTD temperature probe.
7. What is the airflow range?
The flowmeter provides an airflow range of 0–2 L/min, with a needle valve for adjustment.
8. What heating method does the instrument use?
It uses oil bath heating, providing a stable constant-temperature environment for the test.
9. Does the instrument have safety protection?
Yes. The supplied specifications include protection against overheating and low liquid level.