Non-Disruptive Switching of the Double-Tube Lubricating Oil Filter SDGLQ-25T-16

In the oil pump system of the power station, the lubricating oil filter is a key component to ensure the efficient operation of the equipment. The double-barrel lubricating oil filter SDGLQ-25T-16 solves the problem of system shutdown caused by blockage of the traditional single-barrel filter through the design of alternating operation of the double filter cartridges. The reversing valve is the core device for switching the double-barrel filter cartridge. Whether its operation is standardized directly affects the continuity and stability of the system. Let’s take the SDGLQ-25T-16 model as an example, combined with engineering practice, to analyze how to achieve the disturbance-free switching of the working filter cartridge and the spare filter cartridge through the reversing valve to ensure that the equipment is always in the best lubrication state during high-load operation.

1. Structure and function of lubricating oil filter element

The SDGLQ-25T-16 double-barrel lubricating oil filter element consists of two independent filter cartridges and a two-position six-way reversing valve. Its core function is to filter impurities in the lubricating oil through double filter cartridges alternately to prevent particulate matter from entering the precision parts of the oil pump or steam turbine, thereby extending the equipment life and improving operating efficiency. When the pressure difference of one of the filter cartridges increases due to the accumulation of pollutants, the system can switch the flow to the spare filter cartridge through the reversing valve, and the blocked filter cartridge can be cleaned or replaced without stopping.

The design of the reversing valve is the key to achieving disturbance-free switching. Its internal structure includes a valve body, a valve core, a sealing assembly, and a manual or electric drive device. By rotating the handle or remote control signal, the movement of the valve core position will change the on-off state of the oil circuit, so that the oil flow direction between the working filter cartridge and the spare filter cartridge will change. This process needs to ensure a smooth transition of the flow during switching to avoid affecting the system operation due to pressure fluctuations.

2. Operation principle and switching process of the reversing valve

In the actual application of the SDGLQ-25T-16 lubricating oil filter element, the operation of the reversing valve must follow strict steps. Taking the manual reversing valve as an example, the operator must first observe the filter element pressure differential gauge. When the pressure differential value exceeds the set threshold, it indicates that the current working filter cartridge is close to the blockage limit and the switching procedure needs to be started.

The first step in the operation process is to open the bypass valve of the reversing valve to gradually balance the system pressure. At this time, the valve core rotates slowly under manual drive, and the switching channel of the oil circuit in the valve body gradually connects to the spare filter cartridge, while cutting off the oil inlet path of the original working filter cartridge. This process needs to keep the action smooth to avoid equipment vibration or oil flow shock caused by instantaneous pressure changes.

When the reversing valve is completely switched to the spare filter cartridge, the system flow will be automatically distributed to the new working filter cartridge, and the original working filter cartridge will enter the state of waiting for cleaning or replacement. At this time, the operator can discharge the residual oil through the drain valve at the bottom of the filter cartridge, and remove the filter element for cleaning or replacement. The entire switching process does not require shutdown, and the system can maintain continuous operation, minimizing the impact on production.

3. Key control points for disturbance-free switching

The key to achieving disturbance-free switching lies in the operating accuracy of the reversing valve and the system response speed. In the design of the SDGLQ-25T-16 lubricating oil filter element, the sealing component of the reversing valve is made of high temperature resistant and corrosion-resistant materials to ensure that the valve core maintains stable performance during frequent switching. At the same time, the pressure balance valve between the filter cartridges needs to be fully opened before switching to make the oil pressure on both sides consistent, so as to avoid valve core jamming or oil flow impact due to excessive pressure difference.

In actual operation, some engineers may ignore the oil circuit flushing link after switching. When the reversing valve is switched, the air in the spare filter cartridge needs to be discharged through a short-time circulating oil flow, and the fluidity of the lubricating oil needs to be restored to normal levels. In addition, the pressure differential gauge reading needs to be rechecked after switching to confirm that the spare filter cartridge has not caused abnormal pressure drop due to improper installation or poor sealing.

4. Optimization suggestions in engineering practice

In the long-term operation of the power station oil pump, the maintenance strategy of the lubricating oil filter element needs to be dynamically adjusted in combination with the equipment working conditions. For example, under high temperature and high pressure environment, the replacement cycle of the SDGLQ-25T-16 filter element may be shortened to 3-6 months, while it can be extended to 12 months under normal working conditions. Operators need to judge the actual degree of contamination of the filter element based on the oil test report (such as particle size, moisture content), rather than simply relying on the pressure difference threshold.

For the operation of the reversing valve, it is recommended to record the valve core position and switching time after each switching, and to establish a maintenance log. This not only helps to analyze the life law of the lubricating oil filter element, but also provides data support for subsequent troubleshooting. In addition, regular inspection of the sealing components of the reversing valve and replacement of aging or worn sealing rings can effectively avoid the risk of oil leakage or switching failure.

The SDGLQ-25T-16 double-barrel lubricating oil filter element achieves the continuity and reliability of the equipment lubrication system through the disturbance-free switching of the reversing valve. In actual engineering, operators need to fully understand the structural principle of the reversing valve, strictly follow the operating procedures to perform the switching process, and optimize the maintenance strategy in combination with oil monitoring data. By scientifically managing the coordinated operation of the lubricating oil filter element and the reversing valve, the power station oil pump system can maintain high efficiency and stability under complex working conditions.

When looking for high-quality, reliable lubricating oil filter, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:
E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229

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