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Causes of Valve Seat Ring Falling Off in Diesel Generator Set

Apr. 06, 2023

The valve seat ring of the generator set may fall off. Why is this? Generally speaking, the falling off of the valve seat ring of a generator set is caused by improper operation. The specific reasons for the falling off are as follows:


diesel engine generator


When replacing a valve seat ring for a generator set, it is necessary to maintain an interference fit between the valve seat ring and the seat hole on the cylinder head. For example, for a 485 diesel generator set, the intake valve does not have a valve seat ring and directly wants to fit with the valve seat hole on the cylinder head. However, the intake valve seat ring is made of standard steel with an interference amount of 0.073-0.125mm.


During installation, it is required to heat the cylinder head in engine oil to 80-100 degrees Celsius, cool the exhaust valve seat ring with solid carbon dioxide or other low-temperature methods, and quickly press it into the seat hole on the cylinder head. The purpose is to reduce the outer diameter of the seat ring due to cooling, reduce the amount of interference during assembly, and thereby avoid scratching and roughening the mating surface during installation. If the seat ring is knocked into the seat hole at room temperature, That is, it is possible to cause the valve seat ring to fall off and break the piston.


The cooling water inside the diesel generator set cannot be freely discharged. Below, Starlight Power Generation Equipment will introduce the requirements for cooling water inside the diesel generator set:


1. For internally cooled diesel generator sets, the cooling water temperature cannot be higher than 100 ℃ at a temperature of 100 ℃.


2. The requirements for water quality in diesel generator sets are also very high. No mineral water is allowed.


3. It is best to add antifreeze to the diesel generator set (the antifreeze label should be determined based on the temperature in different places).


Water hydrogen cooling is commonly used for large and medium-sized diesel generator sets, and demineralized water or condensed water is used as the cooling medium for the cooling water in the generator sets. The quality of cooling water is very important to ensure the safe and economic operation of power generation equipment. In recent years, with the operation of large capacity, subcritical, and supercritical power generation units, in order to ensure the safe operation of diesel generator equipment, the requirements for the quality of cooling water in diesel generator units have become increasingly high.


Starlight Power has advanced testing equipment, modern production technology, professional manufacturing technology, perfect quality management system, and strong technical research and development capabilities. It can provide 3KW~2500KW various specifications of ordinary, automatic, four protection, automatic switching, low noise and mobile generator sets, high quality and low energy consumption to meet the diverse power needs of customers, and can also meet users with different voltages and different frequencies. It is required to create a parallel power supply system for multiple units. If you are interested in our product or any question on generator, welcome to send email to sales@dieselgeneratortech.com.

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