In the power system, the transformer is a core equipment, and its stable operation is crucial. The transformer pressure relief valve YSF16-70/130KKJ is a key component to ensure the safety of the transformer. Once the sealing failure occurs, it will not only affect the normal operation of the transformer, but may even cause serious safety accidents. In-depth analysis of this problem and exploration of effective solutions are of great practical significance.

I. The importance of YSF16-70/130KKJ pressure relief valve

The transformer pressure relief valve YSF16-70/130KKJ is a constant pressure protection device, which is mainly used to protect the transformer oil tank and container to prevent deformation or bursting due to abnormal internal pressure increase. When a fault occurs inside the oil-immersed transformer, the oil in the tank will be vaporized and produce a large amount of gas, causing the internal pressure of the tank to rise sharply. If this pressure cannot be released in time, the oil tank will be deformed or even burst, causing serious safety accidents. When the oil tank pressure rises to the opening pressure, the YSF16-70/130KKJ pressure relief valve can open quickly in a short time to quickly reduce the oil tank pressure; when the pressure drops to the closing pressure value, it can be reliably closed to maintain positive pressure in the oil tank, effectively preventing external air, water vapor and other impurities from entering the oil tank, avoiding the defect of power outage and replacement of parts after the safety airway is actuated, and has the advantages of reliable and accurate action.

II. Hazards of seal failure

1. Impact on transformer performance: Seal failure will cause external air, moisture and impurities to enter the transformer oil tank. Moisture will reduce the insulation performance of transformer oil and accelerate the aging and damage of insulating materials; impurities may form a conductive channel inside the transformer, causing problems such as partial discharge, thereby affecting the overall performance and service life of the transformer.

2. Causing safety hazards: Seal failure may make it impossible to effectively control the internal pressure of the transformer. If the pressure relief valve cannot be opened or closed normally due to sealing problems when a fault occurs, excessive pressure may cause the oil tank to rupture, hot oil and gas to leak, which is very likely to cause serious safety accidents such as fire or even explosion, posing a huge threat to the safety of personnel and property.

3. Lead to power supply interruption: Failure caused by transformer seal failure may cause the transformer to fail to operate normally, thereby causing power supply interruption. This will not only affect industrial production and residential electricity consumption, but may also have a serious impact on some key areas such as hospitals and transportation, bringing immeasurable losses.

III. Common causes of seal failure

1. Aging of seals: The seals of the pressure relief valve are in a high temperature, high pressure and transformer oil immersion environment for a long time, which is prone to aging, hardening, embrittlement and other phenomena. As time goes by, the sealing performance of the seal gradually decreases, eventually leading to seal failure. Generally speaking, the service life of the seal is closely related to the operating environment and time of the transformer. Usually after 5-10 years, the aging problem of the seal may gradually appear.

2. Improper installation: When installing the YSF16-70/130KKJ pressure relief valve, if the correct installation process is not followed, such as the sealing surface is not cleaned, the seal installation position is offset, the bolt tightening torque is uneven, etc., it may cause poor sealing and seal failure during operation. In addition, for the pressure relief valve with flange structure, if the flange base is improperly configured or unevenly installed, the sealing effect will also be affected.

3. Excessive system pressure fluctuation: During the operation of the transformer, due to load changes, short-circuit faults and other reasons, the internal pressure of the oil tank may fluctuate greatly. Frequent and drastic pressure fluctuations will impact the sealing structure of the pressure relief valve, subject the seal to additional stress, accelerate the wear and damage of the seal, and thus cause the seal to fail.

4. Corrosion: Transformer oil may contain some corrosive substances, such as sulfides and moisture. These substances will corrode the seal in the process of long-term contact with the seal, destroy the material structure of the seal, and reduce its sealing performance. In addition, chemical substances, humidity and other factors in the external environment may also cause corrosion to the external sealing structure of the pressure relief valve, affecting the sealing effect.

IV. Detection method of seal failure

1. Appearance inspection: Regularly inspect the appearance of the pressure relief valve to observe whether there are obvious signs of leakage in the sealing part, such as oil stains, water stains, etc. Check whether the surface of the seal has aging, cracks, deformation and other phenomena, and whether the connection between the valve components is firm. If there are obvious signs of aging or cracks on the surface of the seal, the seal should be replaced in time.

2. Pressure test: Use professional pressure testing equipment to perform pressure test on the pressure relief valve. During the test, gradually increase the pressure to observe whether the opening and closing pressures of the pressure relief valve meet the design requirements, and check whether there is leakage in the sealing part. Through the pressure test, it is possible to accurately judge whether the sealing performance of the pressure relief valve is good.

3. Helium mass spectrometer leak detection: For some occasions with high requirements for sealing, a helium mass spectrometer leak detector can be used to detect the pressure relief valve. The helium mass spectrometer leak detector has extremely high sensitivity and can detect tiny leaks. Fill helium into the pressure relief valve, and then use a helium mass spectrometer leak detector to detect the sealing part. If a helium leak signal is detected, it means that there is a sealing failure problem.

V. Measures to solve sealing failure

1. Replace the seal: Once the seal is found to be aging or damaged, the seal should be replaced in time. When selecting seals, ensure that their materials are compatible with transformer oil and have good high temperature resistance, high pressure resistance, and aging resistance. At the same time, the seals should be replaced in strict accordance with the installation process requirements to ensure that the installation position is correct and the seal is good.

2. Reinstall or adjust: If the seal failure is caused by improper installation, the pressure relief valve needs to be reinstalled or adjusted. Before reinstalling, carefully clean the sealing surface, remove impurities and oil stains, and ensure that the sealing surface is flat and smooth. During the installation process, strictly follow the requirements of the installation instructions to ensure that the seals are installed in place and the bolt tightening torque is uniform.

3. Optimize system operation: In order to reduce the impact of system pressure fluctuations on the sealing performance of the pressure relief valve, the operation of the transformer needs to be optimized. For example, reasonably adjust the load to avoid the transformer being in an overloaded state for a long time; strengthen the monitoring and management of the power grid, promptly discover and deal with problems such as short-circuit faults, and reduce the frequency and amplitude of system pressure fluctuations.

4. Strengthen protective measures: In order to prevent the impact of corrosion on the sealing structure of the pressure relief valve, some protective measures can be taken. For example, transformer oil should be inspected and treated regularly to remove corrosive substances; anti-corrosion paint should be applied to the outside of the pressure relief valve to protect it; when installing the pressure relief valve, rain covers, dust covers and other facilities can be considered to reduce the impact of external environmental factors on it.

Transformer pressure relief valve YSF16-70/130KKJ Seal failure is an issue that needs to be highly valued. By deeply understanding its importance, the hazards, causes, detection methods, solutions and prevention suggestions of seal failure, it can better ensure the safe and stable operation of the transformer and ensure the reliable power supply of the power system. In actual work, power operation and maintenance personnel should strengthen the monitoring and maintenance of pressure relief valves, promptly discover and deal with seal failure problems, and escort the safe operation of the power system.

When looking for high-quality, reliable relief valves, 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