Brass Tight-Fill Top-Seal Adaptors and Plastic Cap for Underground Fuel Tank Systems

Brass Tight-Fill Top-Seal Adaptors and Plastic Cap for Underground Fuel Tank Systems

The HBTFTA Series of Brass Tight-Fill Top-Seal Adaptors are essential components for modern underground fuel storage systems, designed to provide a secure and leak-free connection between the fill riser pipe and gravity drop top-seal delivery elbows. These adaptors are commonly used in conjunction with Tight-Fill Top-Seal Caps, forming a complete vapor-tight system to prevent fuel loss and contamination during unloading operations. Installed in spill containment manholes, they ensure the connection between the tank and transport truck remains safe, reliable, and compliant with industry standards.

Constructed from high-quality bronze with oil-resistant rubber gaskets, the HBTFTA adaptors resist corrosion and wear, providing long-term durability even in harsh environments. Each unit features internal wrenching lugs, enabling easy installation in confined spaces of spill containers without special tools. They are fully compatible with the HBSYWG-100 Series of Gravity Drop Top-Seal Delivery Elbows, ensuring seamless integration with existing fuel unloading systems.

Around the world, this product is known by various names depending on local terminology. In North America and Europe, it is often called a “Top-Seal Fuel Adaptor” or “Tight-Fill Fuel Coupler”. In parts of Asia and the Middle East, operators may refer to it as a “Tank Fill Connection Adaptor” or “Fuel Unloading Coupling”. Despite differences in naming, the function remains the same: maintaining a secure, vapor-tight interface between fuel delivery systems and storage tanks.

Complementing the adaptor, the HBTFTC-100 Tight-Fill Top-Seal Cap is designed to cover the top of the adaptor when not in use. Made from corrosion-resistant PA66 polymer, it protects the tank from vapor emissions, water ingress, dust, and debris. The cap’s toggle lever evenly compresses the Buna-N gasket, creating a secure, water- and vapor-tight seal that can be locked with a padlock or wire seal. This ensures operational safety while reducing maintenance needs and exposure to environmental contaminants.

Together, the HBTFTA adaptors and HBTFTC caps provide a robust solution for underground tank filling systems, ensuring minimal product loss, environmental protection, and operational efficiency. By choosing these components, gas stations and fuel depots worldwide can achieve reliable, standardized fuel transfer while meeting local and international safety regulations.