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Time：2025-05-15 11:41:34 Reading volume：
The following is a detailed guide for oil filter purchases, covering type selection, key parameters, brand recommendations, purchase channels and pitfall avoidance suggestions to help you make purchase decisions efficiently:
1. Filter media:
- Lubricating oil, hydraulic oil, transformer oil, fuel oil, cutting fluid, etc. (different oils have different viscosities).
2. Filtration target:
- Remove impurities (particles), remove water, degas, demulsify, and regenerate waste oil.
3. Working parameters:
- Flow rate (L/min), working pressure (MPa), initial cleanliness (NAS level), target cleanliness.
4. Usage scenario:
- Mobile (maintenance site) or fixed (production line); explosion-proof environment (certification required).
| Type | Principle | Applicable scenarios | Advantages |
|------------------|--------------------------|---------------------------------------|-----------------------------------|
| Plate and frame type | Physical filtration (filter paper/filter cloth) | High viscosity oil, large amount of impurities removal (such as gear oil) | Simple structure, low cost |
| Vacuum type | Heating + vacuum dehydration and degassing | Transformer oil, turbine oil (deep water removal required) | High water removal efficiency (up to ppm level) |
| Centrifugal type | Centrifugal force separation of impurities/water | Ship fuel, emulsion treatment | No consumables, easy maintenance |
| Coalescing type | Coalescing filter element demulsification + separation | Hydraulic oil, turbine oil (trace water removal) | Can be operated online, high degree of automation |
| Electrostatic type | Electrostatic adsorption of particles | High-precision cleaning (such as aviation lubricating oil) | High precision (up to NAS level 4) |
1. Filtration accuracy:
- Coarse filtration (≥10μm), fine filtration (1-10μm), ultra-fine filtration (≤1μm).
- For example, hydraulic systems usually require ≤5μm, and turbines require ≤3μm.
2. Flow matching:
- Calculate the total oil volume of the system and ｓｅｌｅｃｔ a flow rate ≥ 20% of the system circulation volume (such as a 1000L oil tank, ｓｅｌｅｃｔ 200L/min or more).
3. Certification standards:
- Explosion-proof certification (Ex dⅡBT4), CE, ISO 9001 (preferred).
4. Additional functions:
- Heating function (low-temperature oil products), online monitoring (particle counter, moisture sensor).
| Channels | Advantages | Risks | Applicable scenarios |
|----------------|--------------------------|---------------------------------------|--------------------|
| Factory direct sales | Strong technical support, customization | Minimum order quantity requirements (some brands) | Large equipment/long-term cooperation |
| E-commerce platform | Transparent prices (Ali 1688) | Slow after-sales response, anti-counterfeiting inspection required | Standard models/urgent purchases |
| Agents | Localized services | Intermediate price increase (about 10%~20%) | Small and medium-sized enterprises |
1. False parameters:
- Require a third-party test report (such as NAS level of filtration accuracy).
2. Consumables cost:
- Ask about the price of filter element/filter paper (some low-priced machines rely on consumables for profit).
3. Compatibility issues:
- Confirm whether the equipment material is compatible with the oil (such as phosphate ester hydraulic oil requires stainless steel).
4. After-sales terms:
- Specify the warranty period and on-site service fees (additional fees may apply in remote areas).
1. Oil sample testing → 2. Selection consultation (manufacturer/expert) → 3. Compare prices with more than 3 suppliers → 4. Machine inspection (test filtration) → 5. Sign a technical agreement
If you need further help (such as specific brand model recommendations or technical agreement templates), please tell us your detailed working conditions (oil type, budget, etc.), and I will provide customized suggestions!
