Operation Specification and Oil Cut-Off Risk Prevention of Lube Oil Three-Way Valve LXF150/1.6C/P

In the complex system of a thermal power plant, the stable operation of the lubricating oil system is directly related to the safety and efficiency of the equipment. As a key component in the lubricating oil filtration system, the three-way valve LXF150/1.6C/P ​​undertakes the core function of fluid switching and distribution. However, improper operation, especially the wrong sequence, may lead to interruption of lubricating oil supply, which in turn causes equipment failure or even shutdown accidents. Therefore, in-depth understanding of the working principle of the three-way valve, standardized operation procedures and risk prevention and control measures are the prerequisites for ensuring the reliable operation of the system.

I. The core role of the three-way valve in the lubricating oil system

The three-way valve is a valve device that realizes multi-directional control by switching fluid channels. In the lubricating oil system, its main function is to connect the oil filter with the main oil circuit to ensure that the lubricating oil is reasonably distributed between the filter and the bypass. Taking the LXF150/1.6C/P ​​model as an example, the three-way valve is designed with a pressure level of 1.6MPa, which is suitable for high temperature and high pressure conditions and can meet the strict requirements of thermal power plants for the sealing and durability of the lubricating oil system.

During the operation of the oil filter, the three-way valve LXF150/1.6C/P ​​needs to switch to filter mode or bypass mode according to system requirements. When the oil filter is working normally, the three-way valve guides the lubricating oil into the filter element for purification; when the oil filter needs to be repaired or blocked, the three-way valve switches to bypass to ensure that the lubricating oil directly enters the main oil circuit to avoid oil supply interruption due to the deactivation of the oil filter. This dynamic switching function relies on the precise operation and stable performance of the three-way valve.

II. Potential risks and typical cases of incorrect operation sequence

In actual operation, the wrong operation sequence of the three-way valve LXF150/1.6C/P ​​may cause serious consequences. For example, if the standard steps are not followed when switching modes, the lubricating oil may be cut off instantly, causing dry friction of bearings, overheating of equipment, or even damage. The following are typical risk scenarios:

Failure to confirm system status before switching: If the oil filter is not checked to be in a usable state before switching the three-way valve LXF150/1.6C/P, the lubricating oil may not pass through due to the blockage of the oil filter at the moment of switching, causing insufficient oil supply in the system.

The operating handle is not returned to its position: The handle of some three-way valves needs to be rotated to a specific position to complete the switching. If the operator does not fully rotate the handle, the fluid channel may not be fully opened or closed, causing unstable lubricating oil flow.

Other valves are not adjusted synchronously: The operation of three-way valves often involves the coordinated action of multiple valves. If the pressure relief valve or bypass valve is not adjusted synchronously, the lubricating oil may flow back or the system may be over-pressurized due to pressure imbalance.

III. Key measures to avoid incorrect operation sequence

To avoid the above risks, it is necessary to build a systematic risk prevention and control system from three aspects: equipment design, operating specifications and personnel training.

1. Optimize equipment design and installation layout

The design of the three-way valve LXF150/1.6C/P ​​should fully consider the convenience and safety of operation. For example, its handle can be equipped with a limit device to ensure that the operator must rotate to the extreme position to complete the switching, so as to avoid incomplete channel switching due to misoperation. In addition, the installation location of the three-way valve should be selected in an area that is easy to observe and operate, and the flow direction and operation direction should be clearly marked by signs to reduce the possibility of human misjudgment.

During the installation process, the technical requirements provided by the manufacturer must be strictly followed. For example, ensure that the inlet and outlet directions of the three-way valve are consistent with the pipeline flow direction to avoid increased fluid resistance or seal failure due to reverse installation. At the same time, the connection between the three-way valve and peripheral equipment such as the oil filter and pressure gauge should reserve sufficient maintenance space to facilitate the operator to intervene quickly in an emergency.

2. Develop standardized operating procedures

The standardization of operating procedures is the core of avoiding sequence errors. For the LXF150/1.6C/P ​​three-way valve, the following operating steps can be formulated:

Pre-start inspection: Confirm that the oil filter is in good condition, the pressure gauge reading is normal, and the three-way valve handle is in the neutral position.

Switch to filter mode: Slowly rotate the handle to the “filter” direction, observe the pressure change and confirm that the lubricating oil has flowed into the main oil circuit through the filter element.

Switch to bypass mode: Before overhauling the oil filter, first close the main oil circuit valve, then rotate the handle to the “bypass” direction to ensure that the lubricating oil is directly supplied to the equipment around the oil filter.

Resume operation: After the overhaul is completed, reopen the main oil circuit valve, slowly rotate the handle back to the “filter” mode, and check whether the system pressure and flow return to normal.

During the entire operation process, it is necessary to emphasize the “open first and then close” principle, that is, when switching modes, first open the target channel and then close the original channel to avoid insufficient lubrication of the equipment due to momentary flow interruption. For example, when switching to bypass mode, the bypass channel should be opened first, and then the filter channel should be closed to ensure that the lubricating oil is always in a flowing state.

3. Strengthen personnel training and emergency response mechanism

The proficiency and risk awareness of operators directly affect the operating safety of the three-way valve LXF150/1.6C/P. Therefore, special training should be carried out regularly, including the following:

Working principle and structural characteristics of three-way valve: Through physical demonstration and theoretical explanation, operators can understand the role of three-way valve in the system and its switching mechanism.

Identification and handling of typical faults: Combined with case analysis, operators are taught how to quickly judge operating errors and take remedial measures. For example, if the lubricating oil flow drops suddenly, the three-way valve can be checked immediately to see if it has switched to bypass mode, and whether the oil filter is working properly.

Emergency operation process drill: Simulate the scenario of oil filter blockage or three-way valve failure, and train operators to correctly switch valves in emergency situations to ensure the continuity of system oil supply.

In addition, an operation log system can be established, requiring operators to record the time, mode and system status of each switching of the three-way valve for subsequent traceability and analysis. For situations where operating errors occur frequently, it is necessary to adjust the training plan or optimize the equipment identification in a timely manner.

When looking for high-quality, reliable three-way valve, 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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