Core function, sealing protection: It is used at the valve seat interface of the engine intake system to prevent external impurities (such as dust, water vapor) from entering the combustion chamber, while ensuring stable intake pressure. Pressure regulation: Some valve seat inserts integrate a one-way valve function, which can control the intake air flow and optimize the engine combustion efficiency (common design logic in the industry). Suitable model inference XGC150-1 crawler crane: Suitable for its Shangchai SC9DK320Q3 engine (refer to the sealing ring adaptation model). It is necessary to confirm that the air inlet size (such as φ 102mm) matches the specification of the valve seat insert.
