Oil Purifier Buyer's Guide

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:

Clarify your needs (must ask before purchasing)

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).

Types and applicable scenarios of oil filter

| 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) |

Key procurement parameters

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).

Comparison of purchasing channels

| 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 |

Pit avoidance guide

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).

Recommended purchasing process

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!