Model 625 • Flow Switch, Inline Body, Ultralow Flow, Adjustable Actuation Features Detects ultra low flows for 0.25 inch to 2 inch pipelines Used for detection additives, oiling, purging, etc. Low pressure drop at 35 times detected flow rate Field adjustable Description The Delta Controls Model 625 Flow Switch detects ultra low flows for 0.25 to 1.0 inch (6 to 25 mm) pipelines. Applications include flow protection, safety monitoring, purging for explosion proofing, as well as detection of additives, oiling, purging, etc with a low pressure drop at 35 times detected flow rate. It produces on/off switching actions at a preset rate of flow and is field adjustable. The flowing fluid may pass through the variable piston annulus and/or the adjustable bypass valve. A pressure drop is created across the piston due to the flow rate of the fluid. Increasing differential pressure causes the piston to move and compress the range spring. When the piston magnet is carried far enough, the switch magnet is attracted and the output snap switch is actuated. The size of the bypass valve opening determines the flow rate switching point. Model 625 Specifications Style: Type: Temperature: Standard Pressure: Actuation: De-actuation: Accuracy: Output: Available Wetted Materials: Housing Materials: Threaded Connection: Flanged Connection: Flange Rating: Certifications: Stainless Steel Housing Option Only: Inline Piston -4 °F to +400 °F (-20 °C to +204 °C) ≤ +2000 psi (≤ +137.9 bar) 0.04 gpm to 0.75 gpm (water) 0.18 scfm to 2.7 scfm (air) 0.03 gpm to 0.6 gpm (water) 0.15 scfm to 2.0 scfm (air) ≤ 10% SPDT or DPDT, 5 A 316 Stainless Steel, brass Stainless Steel, aluminum 0.5 in to 1 in FPT 1 in ≤ 150 lb Third Party Listed by CSA NRTL/C (USA and Canada) 226 | Flow > Model 625 | deltacnt.com