Nitra pneumatic air filters, air regulators, air lubricators, air relief valves and combination air filters/regulators are available with larger gauges and an easy quarter-turn twist-off feature. These air preparation units are available in a variety of port sizes for a range of pneumatic air supply filtration, air regulation and compressed air lubrication applications. The modular design allows stand-alone applications and enables easy field assembly for combining pneumatic products using modular assembly brackets. The units filter, lubricate and regulate pressure for an entire plant, at the machine or at the component level to ensure consistent pressure for reliable pneumatic actuation.