Safety breakaway couplings ABV series

The ABV series breakaway couplings separate the line at a defined tensile load. This should be selected with a sufficient safety margin below the load limit of the line, such as the maximum tensile load of a hose line.

Three so-called breaking pins, which connect two nearly identical ABV coupling halves via a pair of flanges are used as thetriggering elements. The flanged connection has no overlaps, so tensile forces acting on the line are directly transmitted to the breaking pins independent of the load angle. If the minimum tensile strength is  exceeded, e pins break. This simultaneously loosensthe flanged connection, releasing both coupling halvesso that the load line is separated. The ABV function is available without limitation of the load angle. However, a pure axial tensile force is to  be assumed as a design case on principle. In this case the tensile force is distributed evenly to all three pins so that the threshold for triggering is the highest here.

In contrast, with lateral tensile forces the load is unevenly distributed to the breaking pins. The greater the angle to the coupling axis, this is all the more true. The load then increasingly focuses on one or max. 2 pins, so that the planned separation takes place at a lower threshold value.

The coupling halves are each equipped with a non-return valve to safely close the sectioning points of the line, i.e. the separated coupling halves when triggered. The two spring-loaded non-return valves brace each other in the operating state and keep the line cross-section open. This way the streamlined design ensures the maximum flow cross-section. In the case of separation the mutual support effect of the valves no longer exists so that they abruptly close each cross section being released.

Application areas

• Loading processes by means of hose lines
• Loading processes by means of hinged pipe bracket
• Coupling stations
• Filling processes
• Mobile tanking systems

Your benefits at a glance

• Universally deployable breakaway coupling
• Compact construction
• Favourable price/performance ratio
• Small residues

TRIGGERING FORCES

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