Shaft Seal · Shaft Line Equipment
The 28K, 28L, 42K, 42L and 70L are shaft seals from Desmi Pumping Technology (Suzhou), used where a rotating shaft passes through a casing and the fluid has to be sealed. On board they are fitted on pumps and similar rotating machinery to prevent leakage along the shaft. The designations identify the listed seal sizes and variants, and DNV-GL is the listed class approval.
What our service work and the manufacturer documentation say about keeping this model running.
Check for visible leakage at the shaft, seal face wear and shaft sleeve condition at each machinery overhaul. Surveyors confirm that the seal is renewed per the maker's intervals when the pump or shaft line is opened and that flush or cooling arrangements work.
Keep a complete spare seal set, including faces, elastomers and springs, for each seal size installed. Hold spare shaft sleeves and gaskets where the seal is critical to pump operation.
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