Safety is paramount in oil and gas transportation. Tank trucks carry flammable and explosive media, and even minor leaks or misoperation can cause fires, explosions, and other accidents. Besides standardized operation, the stable operation of key vehicle components is crucial to ensuring safe transportation. The following describes the key advantages of these three core components in safe operation and maintenance: the overflow prevention sensor, the oil and vapor recovery valve, and the braking system.
1. Overflow Prevention Sensor
Oil overflow is a common safety hazard during tank truck loading, unloading, or transportation. It can lead to financial losses and static electricity explosions caused by volatilization of oil and vapor. Overflow prevention sensors can mitigate these risks at the source.
Overflow prevention sensors monitor the liquid level in the tank in real time. When the oil reaches the safe volume limit, an alarm is triggered, such as a whistle in the cab and a light on the dashboard, alerting the operator to stop filling and prevent spills. When the tank is empty, the sensor also sends a signal to help determine the progress of unloading and avoid idling equipment losses. Daily maintenance precautions: Check the sensor probe cleanliness at least once a week to prevent oil contamination and impurities from affecting detection accuracy. Perform a simulated test by filling a small amount monthly to verify the alarm function. If delayed response or false alarms occur, contact a professional for immediate inspection. Never operate with faults.
II. Oil and Vapor Recovery Valve
Oil and vapor are flammable, explosive, and pollute the environment. Some older tanker trucks lack oil and vapor recovery equipment, and oil and vapor are directly discharged during loading and unloading, increasing the risk of explosion and polluting the atmosphere. Oil and vapor recovery valves can address this problem.
The function of an oil and vapor recovery valve is to direct vapours emitted during loading, unloading, and transportation of oil from the tanker truck back to the tank or oil and vapor processing equipment through a closed piping system. This reduces the safety risks associated with oil and vapor leaks and reduces volatile organic compound (VOC) emissions, complying with environmental regulations.
Maintenance focuses on sealing: Before and after each loading and unloading, check the valve port seal for integrity and for deformation, deterioration, or damage. Clean impurities from the valve body quarterly to prevent blockage that affects recovery efficiency. If leaks are detected, immediately stop use and replace the seal or repair it.
III. Braking System
A fully loaded tank truck can weigh tens of tons. Braking system failure can cause serious accidents. Brake pads and tow pins are core components of the braking system, impacting safety.
16-ton brake pads can withstand significant friction, enabling rapid deceleration during emergency braking, shortening stopping distances and reducing the risk of rear-end collisions and rollovers. 50-ton tow pins enhance the stability of the connection between the truck and trailer, preventing vehicle sway and deviation during driving, especially on curves and slopes.
Brake system maintenance requires frequent and rigorous standards: Before each trip, inspect brake pad wear and replace immediately if the thickness is less than 3mm. Check tow pins weekly to prevent loosening. Perform a comprehensive monthly maintenance, including adding brake fluid and adjusting brake clearance, to ensure sensitive and stable braking response.
A high-quality tank truck is the foundation for safe operation. Chengli Special Automobile Co., Ltd., a leading manufacturer of specialized commercial vehicles in China, is headquartered in Suizhou, Hubei, the capital of specialized vehicles. With a 2,000-acre modern production base and over 8,000 employees, its product range encompasses over 800 models, including tank trucks. The company adheres strictly to ISO and CCC international quality standards and collaborates with Huazhong University of Science and Technology to develop innovative technologies. Currently, Chengli Special Automobile vehicles are exported to over 100 countries and regions across Asia and Africa, providing comprehensive technical support, after-sales service, and training.
If you have tank truck purchase needs or would like to learn more about safety-compliant vehicle configurations, please feel free to contact Chengli Special Automobile. We will provide customized solutions to ensure safe and efficient transportation. We look forward to establishing a long-term, mutually beneficial partnership with you!


