Introduction
An existent gum tester is a laboratory instrument used to determine the existent gum content of petroleum fuels, particularly gasoline and aviation fuels, which is the non-volatile residue that remains after a fuel sample is evaporated under standardized conditions, and it is an important quality parameter that indicates the tendency of the fuel to form deposits in engines and fuel systems. In the test, a measured volume of the fuel, typically 50 mL, is evaporated in a steam bath and then subjected to a stream of heated air at a specified temperature, such as 160 degrees Celsius, to remove the volatile components; the residue remaining after evaporation, which consists of the existent gum and any added oxidation products, is weighed, and the result is expressed in milligrams per 100 mL of fuel, and it must not exceed the limits specified in fuel standards. The existent gum content is an indicator of fuel quality, since high gum content can cause deposits in carburetors, injectors, intake valves, and other engine components, affecting performance and emissions. Existent gum testers are used in petroleum refineries, fuel testing laboratories, and quality control facilities for testing gasoline, aviation fuels, and other light fuels, and they follow standardized test methods such as ASTM D381. Features include precise temperature control, controlled airflow, and reproducible evaporation conditions. With their importance in fuel quality assessment, existent gum testers are essential instruments for petroleum testing.
Existent Gum Tester LEGT-T2033
Existent Gum Tester measures gum properties with bath temperature upto 165℃ for reliability. Equipped with advanced sensors for accurate elasticity evaluation and analysis. Built-in mem...
Existent Gum Tester LEGT-T2032
Existent Gum Tester has a φ260 × 130 mm evaporation bath and works within a temperature range of 160℃ to 165℃. It includes 5 pieces of testing holes and is capable of determining up ...
Existent Gum Tester LEGT- B30
It B30 is manufactured and made as per “Test Methods for Existent Gum in Engine Fuels”. It is suitable to determine the tendency of fuels (gasoline, coal oil, diesel oil) to form gum w...
Existent Gum Tester LEGT-T2031
Existent Gum Tester operates at a working temperature range of 60℃ to 165℃. Its aluminum bath construction ensures efficient thermal transfer and durability. The system supports both a...
Standards
Complies with the above standards, but is not limited to them.
Features
1. Existent gum tester for measuring gum content in aviation and motor gasoline.
2. Precision temperature-controlled steam bath or oven for standardized evaporation.
3. Suitable for petroleum refineries, fuel quality laboratories and regulatory testing.
4. Includes evaporation bath, beakers, thermometers and weighing accessories.
5. Determines existent gum content affecting engine performance and fuel quality.
FAQ
Q1: What testing scenarios is this tester mainly applied to?
A: The existent gum tester is used in petroleum refineries, fuel quality laboratories, aviation fuel testing, regulatory agencies and third-party testing organizations to measure the existent gum content in aviation gasoline, motor gasoline and other volatile fuels. The existent gum content indicates the amount of non-volatile residue present in the fuel, which can affect engine performance, carburetor and fuel injector cleanliness, and storage stability. The test involves evaporating a measured volume of fuel under controlled temperature and air flow conditions, then weighing the residue. It is essential for refineries, fuel terminals, aviation fuel suppliers and regulatory agencies requiring accurate gum content determination for fuel specification compliance, quality control, aviation fuel certification, regulatory monitoring and product acceptance, where high gum content can cause engine deposits, reduced performance and potential operational problems in gasoline and aviation fuel applications.
Q2: What standards does the tester comply with?
A: The existent gum test follows ASTM D381 for existent gum in fuels by jet evaporation, ISO 6246 for petroleum products gum content, and the corresponding GB/T methods. The apparatus temperature, air flow and evaporation conditions follow the standard specification. The instrument complies with relevant laboratory safety standards. Temperature and air flow should be verified for compliant testing.
Q3: What is the warranty period for the whole machine and key components?
A: The evaporation bath, temperature control and air supply system are covered by a 12-month warranty. The beakers, thermometers and weighing dishes are glassware or consumables not covered against breakage. Damage from improper use or unauthorized repair is excluded.
Q4: Is this device difficult to operate? Is professional training required?
A: Operation requires trained petroleum laboratory personnel familiar with the existent gum method. We provide an operation manual and remote guidance. Proper sample volume, temperature control, air flow, evaporation technique and gravimetric calculation are important for accurate gum content results.
Q5: What is the typical lead-time for order delivery?
A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.
Q6: Is regular calibration required? What is the recommended calibration cycle?
A: Temperature calibration against a reference thermometer recommended every 6-12 months. Air flow rate verification periodically per the standard method. Beaker and dish cleanliness verified before each use. Full apparatus verification recommended for accredited laboratories.
Q7: Are supporting consumables universal?
A: Beakers, weighing dishes, thermometers and filters are available from laboratory suppliers, though dimensions should match the standard method. Long-term consumable cost is low.
Q8: Can I customize parameters or supporting accessories?
A: Customization includes number of test positions, bath type, temperature range, air supply and automation level. Additional beakers, dishes and accessories can be ordered separately. Custom orders extend delivery lead-time.
Q9: Does the purchase include on-site installation and commissioning service?
A: Standard delivery includes the tester and accessories with an operation manual. Remote commissioning guidance is provided. On-site service is not included for standard orders.
Q10: What types of samples are compatible with this equipment?
A: The existent gum tester measures gum content in aviation gasoline, motor gasoline and other volatile fuels within the method range. Samples should be representative and properly stored to prevent evaporation or contamination. Highly volatile samples require careful handling. Users should follow the standard method including proper sample volume, controlled evaporation temperature and air flow, use clean, pre-weighed beakers, ensure complete evaporation, cool in a desiccator before weighing, and report results in mg per 100 mL. The test should be performed in a well-ventilated area or fume hood due to fuel vapors, and fire safety precautions should be followed for flammable fuel handling.
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