The 211 model consists of an inner frame that is mounted in two friction-free pivots on one end and at a load cell on the other end. An idler is mounted on the inner frame. The pivots absorb the tensile stress in horizontal direction, creating a very solid weighing frame that is also suited for heavy-duty applications.
The 221DB Master belt scale weigh frame consists of two arms, each equipped with a pivot and a load cell, that are mounted to the outside of the side supports of the conveyer belt. The idler or weighing roller will be mounted on top of both arms. This model provides easy assembly and good accessibility for service. The 221DB is suitable for most belt widths and capacities, which makes it applicable in various market segments.
The 311 model consists of an idler or roller placed on a simple load cell beam, which makes it a very cost effective solution. Suitable for belt widths up to 50 inches and belt speeds up to 400 feet/minute. This frame is often used in dosing belts that can regulate the capacity of a bulk flow using the measured value and a controlled belt speed.
The 421 belt scale weigh frame is specifically designed for high volume, low density applications where belt load and belt speed are moderate. This model is also available for hazardous, explosive areas, suitable for ATEX categories II2D and II3D (zone 21 and 22). Two BM11 bending beam, hermetically sealed load cells are mounted on adjusting plates on the outside of the conveyor stringers to create a stable base. A precision weigh roller is tensionlessly mounted directly on the load cells.
Belt scales used in demanding industries like mining, bulk material blending, and sand or gravel quarries require instrumentation that can keep up. The tough yet compact 882D belt scale integrator is engineered to provide straightforward, accurate data in a wide range of environments — even hazardous locations. Designed with advanced programming capabilities and an I/O option, the 882D can be customized to manage product dosing and metering.
A backlit display makes for easy viewing of rate, speed and time, even in lighting conditions where a screen would typically be difficult to read. The 882D’s IP66 stainless steel enclosure protects the instrument from severe weather and is well-suited for exposure to harsh environments. Whether you are belt weighing for process control or a truck, barge or rail loadout application, you can rely on the 882D for durable performance in every setting.
Durability or accuracy? With most belt scales, you get one or the other. With the patented design of Rice Lake’s rugged BCi belt scale, now you can get both. This belt scale is not only one of the most accurate in its class, it’s built to last. Ideal for mining, quarries, bulk material blending, process control operations, and truck/barge/rail load-out applications, the BCi easily handles capacities up to 10,000 tons per hour with unsurpassed accuracy.
The speed sensor monitors the belt speed. It is directly coupled to a rotating shaft which drives a signal generator. The speed sensor submits an output signal at a frequency directly proportional to the shaft speed. It is typically installed on a non-driven pulley of a belt conveyor for detecting belt speed.
Belt conveyors, weigh belts and weigh-belt feeders (if a regulation function is integrated) are available in a great number of variations. Depending on the application, the correct system will be chosen. There is a wide range, varying from simple process weigh belts and weigh-belt feeders to approved and mobile systems.
For specific industries such as steel and chemical, special executions are designed, depending on the product. When necessary, an extraction device (screw or rotary valve) will be mounted under the silo in order to extract the product properly. The speed of the screw or valve will be regulated according the set point and result of the weigh belt.
These systems are also available for use in explosive, hazardous areas and are suitable for ATEX categories II2D and II3D (zone 21 and 22).