Loss-in-Weight Feeders RBP - Hasler - #1

Text version of the page

RBP SCM2-Field SCM2-Panel SDU RBP Technical Sheet Edition: 01/07 For more information, please contact us RBP.260.001-E.a Page 1/2 LOSS-IN-WEIGHT GRAVIMETRIC FEEDERS RBP POWDERY OR SLIGHTLY GRANULAR MATERIAL Accuracy: +/- 0,5 % Flow range from 12 l/h to 14 m3/h Accuracy constency Entirely tight system : no environmental impact Less maintenance No need for live material trial Few wearing parts Manual or automatic refill Horizontal stirrer in lower part that ensures material homogeneity. (Option: vertical stirrer for bad flowing products) Bearing at screw outlet for a better centering in the tube (less cantilever). Enforced tightness by glands, chicanes, and 4 teflon braids. Inspection door in lower part for eventual replacement of horizontal stirrer without dismantling the whole feeder. Execution: Steel S235-JRG2, stainless steel 304 and 316 The Loss-In-Weight feeders work using the principle of controlled lightening. The hopper with its extraction device (screw) is installed on a weighing system giving continuously to the controller the measure of weight. The loss of weight by time unit (measuring sampling time) represents the actual proportioning flow rate. Refill: The continuous measure of weight in the hopper allows, according to two configurable thresholds (high and low), to manage the refill system(s) feeding the hopper. During this refill phase, the screw speed is controlled according to its volumetric efficiency, memorized during the previous controlled emptying phase(s). Vertical stirrer Forced fan P>0,55 kW Inlet counter flange Support feet Outlet counter flange Junction box for motor High level probe Feeding gate Digital load cells (~ 10 time of the max flow rate) Gravitational Vibrating float, Fluidized float Flow control gate, Archimedean screw, "Big bag" emptying station, etc. DOSING : Ground Slag, Anhydrite, Silicium Fumes, Coke fines, Plaster, Starch, Filter Dust, Cement, lime, etc. Function: The flowrate at the feeder discharge point is maintained constant by electronic controller SCM2* at the setpoint value. Detailed alarm informations are obtained via the display (SDU) * SCM2: Field or Panel version: doc : SCM2-F.260.001-E.b or SCM2-P.260.001-E.b Options: Feeding examples: ATEX Version Regulation: The controller compares the actual measured flow to the setpoint and calculates the drive command signal to be sent to the screw speed controller. The corrective actions made are saved and reflect the volumetric behaviour of the system. Controller: