Working principle of main oil pump outlet filter DP602EA03V/- W

The main oil pump outlet filter DP602EA03V/- W is a key filtering element used in the EH oil system of steam turbines. It is mainly installed on the outlet side of the main oil pump to filter solid particles, metal powders, and other impurities in the fire-resistant oil, ensuring the cleanliness of the oil.

1. Filtering principle
The filter element is made of high-precision filtering materials (such as fiberglass or stainless steel), which can effectively intercept impurities in the oil. When the oil passes through the filter element, solid particles and gel like substances are blocked by the filter material, while clean oil flows out from the other end of the filter element. This filtering method not only improves the cleanliness of the oil, but also reduces the wear and tear of downstream equipment (such as oil pumps, valves, etc.) caused by impurities.

2. Design of bypass valve
In order to ensure the normal operation of the system, a bypass valve is designed for the filter element. When the filter element is clogged and the pressure difference is too large, the bypass valve will automatically open, allowing the oil to bypass the filter element and flow directly into the system. Although this may reduce the filtration efficiency, it can avoid system shutdown caused by clogged filter elements.

3. Protect system components
The main function of this filter element is to protect the main oil pump and downstream key components from damage caused by impurities. By removing particulate matter and gel like substances from the oil, the filter element can significantly extend the service life of the equipment and improve the operating efficiency of the system.

4. Technical parameters
-Filtering accuracy: 5-20 microns.
-Work pressure: up to 16 bar.
-Working medium: Suitable for phosphate ester fire-resistant oil (EH oil), hydraulic oil, etc.
-Working temperature: -30 ℃ to+110 ℃.

5. Maintenance and replacement
The service life of the filter element depends on the degree of oil contamination. It is recommended to regularly check the pressure difference and replace the filter element in a timely manner when the pressure difference reaches the set value. In addition, the replacement of the filter element should be strictly carried out in accordance with the operating procedures to ensure the sealing and filtering effect of the system.