AFIXCEL Fixed Flow Pressure Reducing Regulators: RFF20 are used to Industrial hygiene monitors and calibration gases. Fixed flow regulators are designed to be connected directly on high pressure speciality gas mixtures. Fixed Flow Regulators are also ideal for fixed head detectors. These compact fixed flow pressure reducing regulators are preset prior to shipment. Standard ow rates include 0.3,0.5, 1.0, 1.5, 2.0, and 2.5lpm. Other xed ow rates are also available on request.