Bele High Expansion Generator – UL Variant
General description
Aspirated-type high expansion foam generators (HEGs) are designed to expand foam into a large volume of stable bubbles. Expansion rates up to 856:1 are possible due to jet streams of foam solution that aspirate a sufficient amount of air, which is then entrained onto perforated screens to produce high expansion foam. This high performance is achieved without any external power source or moving parts, which gives advantages for installation and reduces ongoing maintenance requirements.
High expansion generators are usually part of a fixed deluge or flow control system and shall be used in combination with a suitable foam proportioning system. Foam concentrates developed and tested to work in high expansion systems shall be used. It is critical to select a combination of generator and foam concentrate that have been developed and tested together to ensure critical parameters are achieved such as expansion, submergence height and fire performance.
High expansion foam systems are commonly used on hazards such as ordinary combustibles, flammable and combustible liquids or liquefied natural gas (LNG) for example. Such hazards are commonly found in applications such as aircraft hangars, warehouses, LNG facilities, cable tunnels, underground storage or recycling plants. High expansion foam systems should be brought into operation very quickly after the onset of fire so suitable detection and actuation systems should be provided.
This technical data is intended for trained experts. For further information, please contact Fomtec or refer to the technical documentation. The contents of this publication are subject to modifications without notice.