How to Choose Between Manual and Pneumatic Loading Arms
Loading arms for truck tankers are available in two operation modes: manual and pneumatic drive. According to loading methods, they are categorized into top-loading and bottom-loading types. In China, except for tankers transporting liquefied petroleum gas (LPG), liquid ammonia, etc., most truck tanker loading arms adopt top-loading. Top-loading can be further divided into open splashing type and closed submersible type. In principle, submersible loading is safer for flammable and explosive media, while splashing loading is only suitable for heavy or viscous oils due to its higher risk of generating static electricity. From an environmental protection perspective, closed loading should be used for volatile, toxic, harmful, or pungent media.
Selection Between Pneumatic and Manual Loading Arms
Pneumatic Loading Arms
Working Principle: Driven by compressed air, transmitting power through gas flow in pipelines.
Advantages:
Automated operation reduces manual labor and improves work efficiency.
Suitable for narrow production sites, requiring less physical effort than manual arms.
Disadvantages:
Higher manufacturing cost.
Higher failure rate, with more complex maintenance and repair compared to manual arms.
Manual Loading Arms
Working Principle: Components are connected via swivel joints, allowing operators to manually adjust the arm's angle and position for liquid loading/unloading.
Advantages:
No external power source needed, relying entirely on human operation.
Minimal regular maintenance required, only periodic upkeep for swivel joints.
Hard-pipe connections replace traditional hose connections, significantly enhancing operational safety.
No extra maintenance costs, ideal for scenarios with limited investment or abundant human resources.
Comprehensive Selection Considerations
The choice between pneumatic and manual loading arms should integrate factors such as workforce availability, investment scale, etc. We generally recommend manual loading arms, as their maximum operating force is only about 30 Newtons, making them relatively easy to use.
