The flow-optimised construction of the ASVL breakaway couplings results in short loading times without additional energy spending. Vice-versa, considerable pump performance (pressure loss) can be saved at identical loading performance. Furthermore, the design ensures a particularly low cavitation inclination within the coupling.
The system of cable triggering has a lower threshold and is easier to dose than with breaking pins. To prevent damage to the hose, coupling or vehicle, it is partially necessary to separate the coupling already before the situation becomes critical.
The ASVL series was particularly developed for loading processes in which both high flow capacity and low pressure loss are as important as the comprehensive protection of the loading line.
ASVL series breakaway couplings provide the same functions as those of the ABV series, but a much higher flow capacity due to their flow-optimised design:
ASVL series breakaway couplings separate the line when the mobile unit exceeds a pre-set radius of motion. The radius of motion should be smaller than the maximum deflection of the loading line. Both coupling halves are equipped with a non-return valve each that allows to close the line impermeably when it is separated and to exclude that the medium escapes into the environment.
The basic principle:
Compared with load-limited triggering (see ABV and ABVL series), the ASVL series triggers without any stress on the loading line via a load cable that limits the radius of motion of the mobile unit. The trigger mechanism actuated via the cable is patented and has set the standard in this product segment for years!
The ASVL series couplings consist of two coupling halves. These are connected via a pair of flanges by means of a patented clamp/supporting ring system during normal operation. The supporting ring is connected to a rope that has to be attached to the stationary unit in a way that it is always shorter than the loading line independent of the direction of motion of the mobile loading partner.
When exceeding the radius of motion thus defined, the cable tightens, pulls the supporting ring from the clamp/supporting ring system thus loosening the connection between the two coupling halves. In this case, the separated coupling halves must be closed immediately; for this purpose the two housing halves are equipped with spring-loaded non-return valves. In the operating state, they brace each other and keep the flow cross-section open. 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.