Replacement of Booster Pump Seal Ring HZB253-640-03-07: Key Steps to Avoid Damage

In the boiler system of a thermal power plant, the booster pump seal ring HZB253-640-03-07 is one of the core components to ensure the stable operation of the equipment. It not only withstands high temperature and high pressure conditions, but is also directly related to the sealing performance between the pump body and the pipeline. However, the seal ring will inevitably fail due to aging, wear or corrosion during long-term use and needs to be replaced regularly. However, many operation and maintenance personnel have found in actual operations that a slight carelessness when replacing the booster pump seal ring may cause damage to the seal ring, installation failure, and even equipment failure. Today we will share some practical experience to help everyone complete the replacement work efficiently while avoiding damage to the booster pump seal ring.

I. The “fragility” and replacement difficulties of the booster pump seal ring

The booster pump seal ring HZB253-640-03-07 is made of rubber elastic material, and its design purpose is to maintain sealing performance under dynamic conditions. However, this type of material itself has a certain degree of flexibility and fragility. Once uneven force, excessive friction or wrong direction are applied during disassembly or installation, it is very easy to cause lip damage, indentation deformation or even breakage. For example, when replacing the seal ring, the burrs on the installation surface are not cleaned, resulting in the seal ring being scratched by the sharp metal edge when embedded in the groove, and eventually leakage occurs during the operation of the pump body.

More importantly, the installation position of the booster pump seal ring HZB253-640-03-07 is usually at the junction of the pump body and the sleeve, with a small space and inconvenient operation. If tools are used forcibly or the lubrication steps are ignored, not only will the seal ring be damaged, but also the internal structure of the pump body may be irreversibly damaged. Therefore, when replacing the booster pump seal ring, both operating specifications and detail processing must be taken into account.

II. The whole process of replacing the booster pump seal ring: “gentle operation” from disassembly to installation

1. Removing the old seal ring: avoiding “violence” is the key

The first step in removing the booster pump seal ring HZB253-640-03-07 is to turn off the power of the equipment and hang a warning sign to ensure safe operation. Afterwards, loosen the pump end cover screws symmetrically to gradually release the internal pressure. At this point, the old seal may be attached to the sleeve due to long-term pressure, and forcible pulling may easily cause the lip to tear. My experience is to use special tools (such as wire hooks or rubber hammers) to slowly pry the edge of the seal, and spray a small amount of lubricating oil on the sealing surface to gradually loosen it.

For example, during the maintenance of a power plant, engineers found that the seal of a certain booster pump was completely attached to the sleeve due to high temperature aging, and direct pulling caused the seal to break. Later, lubricants were used to soften the bonding surface, and the old seal was finally completely removed by rotating the sleeve, avoiding secondary damage.

2. Cleaning and inspection: details that do not leave “hidden dangers”

The HZB253-640-03-07 pump body sealing surface and sleeve must be thoroughly cleaned before replacement. Use aviation washing gasoline or anhydrous ethanol to wipe the groove to remove oil, rust or foreign particles. These tiny particles may be embedded in the surface of the seal during installation, causing local wear or indentation. In addition, check the groove for burrs or scratches, which are common sources of seal damage.

3. Installing a new seal: “Dual control” of direction and lubrication

When installing the booster pump seal HZB253-640-03-07, the direction must strictly follow the design requirements. For example, the lip of some seals needs to face the direction of the medium flow, otherwise it will cause seal failure. Before installation, a thin layer of grease can be applied to the inside of the seal to reduce friction and protect the lip.

It should be noted that the choice of lubricant must be compatible with the seal material. For example, if the seal is made of fluororubber, lubricants containing silicone oil should be avoided to avoid swelling. In addition, during installation, use a pressure plate or correction rod to gradually press the seal in to avoid direct knocking or twisting.

4. Correction and testing: Ensure “zero defect” operation

After the seal is installed, its regularity needs to be verified through the correction steps. For example, use a correction rod with a cone guide to repeatedly push and pull the seal ring to observe whether the resistance is uniform and whether there is twisting or offset. If any abnormality is found, it is necessary to disassemble and adjust the installation angle.

Finally, pressure testing is an essential step. After starting the equipment, observe whether the pump body seal surface is leaking, and record the vibration and temperature changes during operation.

III. Common misunderstandings and coping strategies

In actual operation, many novices are prone to misunderstandings. For example, some people think that “as long as the seal ring can be inserted”, but ignore the installation direction or lubrication steps; some people use the old seal ring to “make do” in order to save trouble, but the result is leakage due to insufficient elasticity. Our advice is: “It is better to spend ten minutes more on correction than to save five minutes on starting the pump.”

In addition, the method needs to be adjusted flexibly under special working conditions. For example, when replacing the HZB253-640-03-07 booster pump seal ring in a high temperature environment, it is necessary to choose a high temperature resistant material and avoid long-term exposure to sunlight to cause aging. If the pump body space is small, a long-handled lubrication brush or syringe can be used to accurately apply lubricant to reduce the risk of manual operation.

Replacing the seal ring of the boiler electric pump HZB253-640-03-07 seems to be a simple operation, but it is actually the key to ensure the stable operation of the equipment. From removing the old seal ring to installing the new seal ring, to calibration and testing, every link needs to be treated rigorously. In addition to the operating specifications during replacement, daily maintenance is equally important. For example, regularly check the wear of the seal ring. If cracks or indentations are found on the lip, it needs to be replaced in time; during the equipment shutdown, rust inhibitors can be sprayed on the sealing surface to prevent oxidation corrosion.

If you also work in a power plant, you might as well share these experiences with your colleagues. Through standardized operation and preventive maintenance, not only can the service life of the booster pump seal ring be extended, but also the chain failure caused by seal failure can be avoided. After all, in a thermal power plant operating at high load, every successful replacement is a silent commitment to equipment safety.

When looking for high-quality, reliable booster pump spare parts, 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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