• Cristal Instruments

Flow Switches, Paddle/Vane Type

Cristal Instruments offers Flow Switches of Paddle/Vane type (Model CFS-250) as well as On-line Disc type (Model CFS-150) for vast application. These are used in low flow alarm application, pump protection, coolant flow systems, safety cut-offs, machine tool oil system, blending and lubrication system and for excessive and/or insufficient flow protection. Liquid or gas flow is sensed by the freely suspended paddle/disc through the bellow sealed design, creating movement of SS paddle/disc against the spring force which is preset at a predetermined flow rate. A precision spring ensures repeatability and high degree of operation. No magnetic parts are employed. The bellow is sealed to ensure positive isolation between switch assembly and process fluid. The bellow movement corresponding to flow allows to actuate the sensor switch of micro switch of 1 NO + 1 NC contacts having current rating 5 A/15 A at 240 V AC. The flow switch is tested for maximum pressure of 10 bar and suitable for temperature up to 200ºC. Process connection for paddle type is 1” BSP(M) standard and for on-line disc type, size varies from 15 NB to 150 NB. Switch enclosure is of weather-proof or flame-proof construction.