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Time：2025-09-24 13:36:52 Reading volume：
Choosing a qualified oil purifier is crucial for maintaining oil cleanliness, protecting equipment, and reducing maintenance costs. To evaluate whether an oil purifier meets required standards, you should examine its core performance, safety, manufacturing quality, regulatory compliance, and actual performance. Below is a step-by-step guide.
The first step is to check whether the oil purifier meets key performance benchmarks.
Filtration Refinement → The smallest particle size (measured in microns) that the purifier can intercept.
Hydraulic oil: 1-5 microns (very stringent requirements).
Lubricating oil: 10-20 microns (less stringent requirements).
Always request a test report based on international standards (such as ISO 16889), rather than a verbal statement.
Dirt Holding Capacity → How much contaminant (measured in milligrams) a filter can capture before clogging. A higher dirt-holding capacity means longer filter life and lower operating costs.
Flow Rate → The amount of oil processed by the filter (liters per minute). It should meet the system's required efficiency without compromising filtration accuracy.
Water Removal Capacity → For oils susceptible to moisture (such as turbine oil), focus on demulsification and dewatering efficiency. A qualified vacuum oil filter should also be equipped with a sedimentation and drainage system to remove free water.
A qualified oil filter must operate safely and stably in various environments.
Electrical Safety → Explosion-proof motors are required in flammable environments. Please check for certifications such as CE, CCC, or ATEX.
Mechanical Safety → The equipment should include protective devices (for overpressure, overheating, and overload). Pressure and vacuum gauges must be reliable.
Operational Stability → The system should operate smoothly over extended periods of continuous operation, with minimal noise, low vibration, and stable performance.
Durability and user experience are largely dependent on the design and materials used.
Material Quality → Oil-contact components (oil tanks, piping, filter housings) should be made of corrosion-resistant stainless steel (304/316) to prevent secondary contamination.
Workmanship Quality → Smooth welds, neat piping layouts (no dead corners), and uniform anti-corrosion coatings indicate high-quality manufacturing.
User-Friendly Design → Easily replaceable filter elements, wheels for easy relocation, sampling valves, and level gauges enhance convenience.
Always verify the manufacturer's reputation.
Choose a supplier with proven industry credentials and a proven track record.
Prefer oil purifiers whose components (especially filter elements) are ISO-certified for quality management systems.
Request a performance test report to confirm specifications.
Even after certification, field testing is the ultimate proof.
On-site Demonstration → Whenever possible, test the oil purifier using actual oil. Laboratory Oil Testing → Collect oil samples before and after filtration and compare the following key data:
Cleanliness (ISO 4406)
Water Content
Acid Number
A qualified oil purifier should significantly improve oil quality.
Conclusion
A truly qualified oil purifier is more than just a matter of specifications; it must also be suitable for your oil type, equipment requirements, and operating conditions. Before purchasing:
Evaluate core performance (filtration fineness, capacity, flow rate, water removal).
Check safety, reliability, and design quality.
Verify compliance with international standards.
Request actual or laboratory test certificates.
By combining technical data, certifications, and actual testing, you can be confident in selecting an oil purifier that ensures equipment safety, extends oil life, and reduces maintenance costs.
