SME Foam Generator Discharge Devices | Medium Expansion Generator

Description

Medium Expansion (MEX) foam generators are designed to expand foam solution into a stable aggregation of bubbles with discharge expansion ratios from 20:1 up to 200:1, which is dependent on the foam concentrate, used and supply pressure. Foam solution enters the generator through a sized orifice inside the inlet tube and is sprayed onto a mesh diffuser screen. The increased velocity through the inlet orifice creates a venturi effect and aspirates air into the spraying foam solution creating a homogeneous finished foam. The produced foam is capable of flowing into hard to reach areas and limits the release of flammable vapors due to its thick foam blanket. The expanded foam properties makes it suitable for indoor and outdoor use.

MEX generators are usually part of a fixed deluge or flow control system and shall be used in combination with a suitable foam proportioning system. They are suitable for use in total flooding or local application systems. Foam Concentrates developed and tested to work in medium expansion systems should be used. It is important to consider that different foams will have varying expansion performance through a medium expansion generator.

Medium expansion foam systems are commonly used on hazards with ordinary combustibles (Class A) or ignitable liquids (Class B). These hazards are commonly found in process areas, chemical storage, tank farms, loading areas and fuel transfer facilities for example.

This technical data is intended for trained experts. It contains basic information needed to use the product described.  Technical data can be found on the Fomtec website. For further information, please contact Fomtec or refer to the technical documentation. The contents of this publication are subject to modifications without notice.

Listings and approvals

None