What is the flow rate of the oil purifier?

The flow rate (processing capacity) of the oil filter is usually expressed in liters per hour (L/h) or cubic meters per hour (m³/h). The specific value depends on the equipment model, oil type, filtration accuracy and working conditions. The following are typical flow rate ranges and selection criteria for different application scenarios:

Common Oil Filter Flow Rate Ranges

|         Oil Filter Type           | Typical Flow Rate Range |                                      Application Scenarios                                               |

|-----------------------------|----------------------------|----------------------------------|

| Small Portable Oil Filter    | 100-500 L/h                    | Laboratories, small machinery, small-volume oil treatment                         |

| Industrial-Grade Oil Filter | 1,000-6,000 L/h              | Transformer oil, lubricating oil, hydraulic oil purification                              |

| Large High-Flow Oil Filter | 6,000-20,000 L/h            | Large-Capacity Oil Systems in Power Plants, Steel Mills, and Ships              |

| Vacuum Oil Filter               | 1,000-12,000 L/h            | High-Precision Dehydration and Degassing (e.g., insulating oil treatment) |

Key Factors Affecting Flow Rate

1. Oil Viscosity

- Low-viscosity oils (such as turbine oil) have a higher flow rate, while high-viscosity oils (such as gear oil) require a lower flow rate or heating (usually to 40-60°C) to improve fluidity.

2. Filtration Fineness

- The higher the fineness (e.g., 1 μm), the lower the flow rate. For example:

- A coarse filter (100 μm) can achieve a flow rate of 10,000 L/h, while a fine filter (5 μm) may only achieve 2,000 L/h.

3. System Pressure

- The flow rate of a pressure oil filter (such as a plate and frame type) is affected by pump pressure, with a typical operating pressure of 0.3-0.6 MPa.

4. Contamination Level

- When the impurity/moisture content in the oil is high, the flow rate should be reduced or filtration should be performed in stages (coarse filtration followed by fine filtration).

How to Choose the Appropriate Flow Rate?

1. Calculating Requirements

- Formula: Flow Rate ≥ Tank Volume (L) ÷ Target Filtration Time (h)

For example: A 1,000 L tank needs to be filtered within 4 hours → Flow Rate ≥ 250 L/h.

2. Reference Standards

- Transformer Oil Filter: DL/T 521 requires a flow rate ≥ 1,500 L/h (for medium-sized transformers).

- Hydraulic Oil Filter: ISO 4406 recommends a circulating filtration flow rate of 1-2 times the system tank volume per hour.

3. Matching Equipment

- Check the nominal flow rate on the oil filter nameplate (e.g., ZYD-100: 6,000 L/h) and allow a 10%-20% margin.

Typical Application Examples

1. Transformer Oil Treatment

- Flow Rate: 3,000-6,000 L/h (vacuum oil filter with ≤5 μm filter element).

2. Lubricating Oil Regeneration

- Flow Rate: 1,000-2,000 L/h (Centrifugal Oil Filter, 10-20 μm precision).

3. Fuel Purification

- Flow Rate: 5,000-10,000 L/h (Pressure Oil Filter with Water Separation).

Precautions

- Avoid Overloading: Prolonged full flow shortens filter element life. It is recommended to operate at 80% of the nominal flow rate.

- Temperature Effects: Preheat the oil at low temperatures (e.g., <10°C), otherwise the flow rate will ｄｒｏｐ by 30%-50%.

- Regular Maintenance: Check the oil pump and filter element for blockage and ensure stable flow.

Note: The specific flow rate should be determined based on the equipment manual and actual oil testing. If necessary, consult the manufacturer (such as Pall, Hifi, or domestic brands) for matching operating parameters.