In tanker loading applications, overfill prevention is one of the most important safety functions at the loading rack. A reliable system must confirm that the tanker connection is correct, the probe circuit is healthy, and the loading process can be stopped before product reaches an unsafe level.

The ALPTEC SLA-S-Y Series is designed for this purpose. It is an ATEX-certified overfill prevention device for hazardous-area loading applications, with more than 20 years of proven field experience in tanker loading, terminal and tank farm environments.

Designed for Hazardous Loading Areas

Fuel terminals, chemical plants and tank farms often handle flammable or hazardous liquids. In these environments, equipment used around the loading rack must meet strict safety requirements.

The SLA-S-Y Series is developed for hazardous-area operation and complies with ATEX certification requirements. This makes it suitable for loading applications where overfill prevention, safe electrical design and reliable interlock control are required.

How the SLA-S-Y Protects Loading Operations

During loading, the SLA-S-Y device monitors the tanker overfill protection circuit. It checks whether the plug/socket connection is correct and whether the tanker-mounted probes are in normal dry condition.

If a probe detects liquid at the high-level point, or if the circuit becomes abnormal, the device changes output state and removes the loading permissive signal. This signal can be connected to the site control system to stop the pump, close the valve, pause the batch controller or trigger alarm indication.

This logic helps the loading rack follow one clear rule: loading is allowed only when the overfill protection circuit is normal.

Three Selectable Configurations

To match different site standards and operating requirements, the SLA-S-Y Series is available in three selectable versions:

SLA-S-Y-GE

SLA-S-Y-API

SLA-S-Y-EN

These options allow the system to adapt to different tanker interfaces, loading rack practices and customer specifications. Whether the site requires API-type connection, EN-type connection or GE configuration, ALPTEC can provide the appropriate SLA-S-Y solution for the application.

Built on Long-Term Field Experience

One of the key advantages of the SLA-S-Y Series is its long service history. With more than 20 years of field experience, the product has been used in real loading environments where reliability, clear status output and stable operation are essential.

This experience is important because overfill prevention equipment must perform consistently under daily connection, disconnection, vibration, weather exposure and demanding terminal operation.

Practical Benefits for Terminals

The SLA-S-Y Series helps loading sites improve safety and operating discipline by providing:

ATEX-certified design for hazardous-area applications

Monitoring of tanker overfill protection circuits

Loading permissive and interlock output

Support for different tanker connection standards

Clear response to wet probe or abnormal circuit conditions

Proven performance based on more than 20 years of site experience

By integrating the SLA-S-Y output into pumps, valves or batch control systems, terminals can reduce dependence on manual judgment and prevent loading from continuing under unsafe conditions.

Conclusion

The SLA-S-Y Series is a professional overfill prevention device for tanker loading applications. With ATEX certification, selectable SLA-S-Y-GE, SLA-S-Y-API and SLA-S-Y-EN configurations, and more than 20 years of field experience, it provides a reliable solution for safer loading rack operation.

For terminals, tank farms and chemical loading stations, the SLA-S-Y Series helps convert overfill detection into practical loading control, supporting safer and more reliable product transfer.