Multistage centrifugal boiler feed pump is leaking at some place in the operation, such as machine seal, middle section, balance water pipe, etc.
In general, we need to analyze the reasons according to the site conditions.
1: For example, if the machine seal leaks water, we need to check whether the installation of the machine seal is in place and reasonable and the problems of the machine seal itself first.
Through the troubleshooting of these condensation questions, we can find out where the key problems of water leakage are. Then the corresponding problems will be solved.
2: The sealing problems of middle section and balance water pipe are caused by too high internal pressure of pump chamber.
In general, it is necessary to design the key parts such as tension bolt and sealing thread more reasonable and enough compression force and strength.
3: The problem of the casting of the boiler feed pump itself is generally to check the leakage through hydrostatic test of the pump, and the standard is determined according to the factory standard.
(1) : if water leakage is checked at a certain position of the pump through pressure test, the position of water leakage of the pump will be removed at the first time, and then the size of sand hole and air hole will be checked. If it is made of cast steel and stainless steel, the water leakage can be solved by electric welding.
(2) : If it is serious, the company will replace the leaking parts to ensure the normal and stable use of users.
4: What's more, only after the pump has been running for a period of time can we find that a certain position of the pump is leaking water, spraying water, etc. in case of this situation:
(1) We generally recommend the user to confirm whether to stop the pump according to the water leakage
(2) : Or find a strong thick plate to cover first, and if the material of the pump is cast steel or stainless steel, then the leakage part of the pump can be removed and welded after the pump is stopped on site.
If it is other cast iron, nodular iron and so on, the supplier can be required to provide the parts for replacement. Because of the development of modern technology, materials like cast iron and nodular iron can be welded with special electrodes. This can not only save the economic cost of users, but also save the time of users.
5: Because of the missing inspection of some parts caused by machining and other reasons, they are put into the qualified parts for assembly. Only parts can be replaced in this case.
