Type FMA and FMS filter housings are designed as compressed air filter housings for the high-pressure range in the pressure levels 100 bar and 350 bar for compressed air without aggressive substances.
Type FMA and FMS filter housings are made from machined aluminium (FMA) or steel (FMS). For surface finishing purposes and for increasing the resistance the housings are passivated completely and an impact-proof and abrasion-proof powder coating is provided on the outer side of the housing.
Each housing has an O-ring seal at either end of the housing thread. As a result, both the thread and the thread grease are protected against contact of the operating fluid and against negative effects from the ambient air. In addition, when screwing the lower filter part (filter bowl) into the upper filter part (filter head) the torque applied to the thread of the filter housing is limited by means of a limit stop. This prevents the thread from being pressed or overstressed and the housings can easily be opened although they are subject to heavy mechanical load during high-pressure operation. If necessary opening the housing can be supported using a hook spanner wrench (DIN 1810 B).
Each type FMA and FMS filter housing is designed for one filter element to be inserted. In addition, these housings are provided with an inlet and outlet with a thread each (connection size depends on the model) as well as with a condensate outlet with a G 1/4 thread (all threads according to DIN 259). All the models also have 2 x G 1/4 threaded connections which, in conjunction with two M10 x 1.5 mounting holes, are used for differential pressure monitoring and compressed air purity monitoring.
The filter housings comply with the requirements of the Pressure Equipment Directive 2014/68/EU, and some (depending on the model and pressure level) have the CE marking of this European directive.