When bottom loading, it is vital to open the compartment sequentially ahead of the foot valve in order to allow air/vapours out as the product enters the compartment. In order to follow the VOC directive it is necessary to collect the vapours and return them to the gantry. At the same time, each compartment must be secured against ignition by a flame arrester.
Also during transport and discharge the compartment must be able to “breath” so the pressureless tank remains without overpressure and vacuum.
A pressure/vacuum vapour recovery valve with an integrated flame arrester will solve all of the issues above and this is what we can offer.