e-refrigeration.com

Filter Driers

 Filter Driers are used on refrigeration systems to help eliminate any moisture and particles which may block other components.

The Drier is made up of a metal outer container and inside there is a desiccant (moisture removal material) and strainer.  Refrigerant passes through the drier and give up any moisture as well as any unwanted matter.

The main job of the drier is to protect the metering device from clogging either by Ice (moisture) or blockage by particles.   It is not uncommon for driers and filters to block due to their nature of picking up unwanted agents - evidence of this can be seen by frost build up.

It is important for driers to be fitted in the correct direction.  They usually have an arrow to guide a fitter of the direction they are to be installed.