Shijiazhuang Shisan Hang International Trade Co., Ltd. recently completed a customized engine valve project for a European heavy-duty truck manufacturer. The client required valves with enhanced high-temperature resistance and fatigue strength to adapt to high-load, long-mileage operation scenarios. The company’s engineering team developed an exclusive valve product by adjusting material formulations and surface treatment processes. After real-vehicle testing by the client, the engine’s thermal efficiency increased by 5%, and the valve service life was extended by 20%, effectively reducing the client’s operation and maintenance costs and earning high praise.