For calibration stations with built-in suction pump.
The Portages pressure Demand Flow Regulators (DFR) are designed for use with the Portagreen line of cylinders. The DFR has been designed to provide the correct gas flow to instruments that have internal pumps. Typical activation suction is from 0' to 3' of water column. The DFR can be configured for inlet pressures ranging from 250 psig up to 3000 psig, with an outlet fitting of 3/16" hose barb. The DFR is available with an aluminum body for non-reactive gases only.