Key Features

 Spin-on Design: This is a one-piece metal canister filter. To replace the old filter, simply unscrew and replace it with a new one, eliminating the need to replace the internal filter element. This makes operation extremely simple and convenient for maintenance in marine environments.

 High-Performance Filter Media: Utilizing high-quality resin-impregnated filter paper or composite filter media, it offers high dirt holding capacity and filtration efficiency, effectively removing even the smallest harmful particles from the oil.

 Robust Construction: The metal housing and internal structure withstand the pressure of engine oil passages and the vibrations of a marine environment.

 Leak-Proof Design: A built-in sealing ring ensures a perfect seal with the engine mount, preventing oil leaks.

 Bypass Valve: The filter element is equipped with an integrated bypass valve. If the filter element becomes clogged due to excessive pressure differential caused by thick, cold oil or excessive contamination, the bypass valve opens, allowing unfiltered oil to flow into the engine. Prioritizing lubrication over filtration, this prevents engine damage from oil starvation. This is a safety feature.

Important Notes

1. Dimensions and Compatibility: When replacing an oil filter, must confirm that the replacement filter element (e.g., H391W) has the exact same dimensions, thread connections, and seal diameter as the original element (N15201-Z9009). Although they are compatible models, it is best to verify the technical specifications or compatibility chart.

2. Quality is Crucial: The quality of the oil filter element is directly related to the life of the engine. Poor-quality filters may suffer from low filtration efficiency, inaccurate bypass valve opening pressure, and insufficient structural strength, leading to premature engine wear. Reputable brands such as MANN, Baldwin, and Fleetguard are reliable choices.

3. Replacement Interval: The replacement interval should strictly adhere to the engine manufacturer's recommendations, which are typically based on engine operating hours or oil change intervals. The oil filter element must be replaced at every oil change.

4. Marine Certification: Genuine filters meet relevant international standards (such as ISO) and classification society requirements, ensuring their reliability and safety for maritime applications.

Summary: The N15201-Z9009 / H391W is a spin-on oil filter widely used in marine diesel engines. Its core function is to keep the oil clean, making it a critical maintenance component for proper engine operation and extended service life. The H391W is a high-quality, compatible replacement model offered by Baldwin.

Leah     Sales Manager

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