Filter Regulator Lubricators (FRL)

An FRL is comprised of three primary components: Airline filter Pressure regulator Lubricator Each of these individual components has its own role, supporting the larger air compressor system. We will explain more about these roles in the following sections.
An airline filter cleans compressed air. It strains the air, traps solid particles (dust, dirt, rust) and separates liquids (water, oil) entrained in the compressed air. Filters are installed in the air line upstream of regulators, lubricators, directional control valves, and air driven devices such as cylinders and air motors.
Pressure regulators reduce and control air pressure in compressed air systems, including rotary screw air compressors. Regulators are also frequently referred to as PRVs (pressure reducing valves). Optimally, a pressure regulator maintains a constant output pressure regardless of variations in the input pressure and downstream flow requirements. In practice, output pressure is influenced to some degree by variations in primary pressure and flow.

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