The Thermo Scientific Ramsey Medium Range Weigh Feeder offers accurate weigh feeding of light materials at low feed rates. Its unique design and construction features provide a consistent flow of materials, offer increased sensitivity for more accurate weighing of the lightest materials, and permit quick and easy cleaning and maintenance.
Precise feeding of process materials is often critical to maintaining product quality. A feeder that weighs accurately and reliably can reduce material waste, help maintain blend consistency and increase profits.
We have over 35 years of experience designing and manufacturing weigh belt feeders. Every feeder is designed to meet the specific needs of the application. We work closely with our customers to ensure that each system meets their expectations for performance and dependability.
The Thermo Scientific Ramsey Medium capacity weigh belt feeder is designed for weigh feeding applications with low feed rates and light belt loading requirements. It accommodates flow rates as low as 54 kg per hour up to 25000 kg per hour, and belt loadings of 3 kg/m to 30 kg/m .
Theory of Operation
Material is fed onto the feeder through an inlet feed section equipped with a manually adjustable vertical slide gate to control material height. The scale carriage/weighbridge assembly measures the gravitational force of the material and converts this force measurement into an electrical output signal proportional to belt loading.
A digital speed sensor continuously monitors the belt speed.
The microprocessor-based electronics integrate the two signals to produce and display a true rate and a total weight fed. The electronics also provide an output signal for control and monitoring purposes.
For more information, refer to the separate product specification sheet on the Thermo Scientific Ramsey Micro-Tech 2000 or 3000 series of electronic integrators.
Features and Benefits
The RamseyTM Model Medium capacity weigh belt feeder, with its innovative design and unique features, was developed to meet the high standards and greater accuracy demands of today’s food, chemical and process industries.
- Unique Head Pulley Configuration: The pulley configuration on the discharge end of the belt provides an even, consistent flow of difficult process materials off of the belt.
- Tail Drive Arrangement: This reduces carry-side belt tensions to provide greater sensitivity for more accurate weighing of the lightest materials.
- Cantilever Design: This feature permits quick and easy belt removal for cleaning and maintenance.
- Dual Load Cell Scale: Dual load cells enable a higher degree of response to material weight variations.
- Stainless Steel Construction: Stainless steel provides improved corrosion resistance and wash down capabilities.
General Specifications
Accuracy
±0.25% to 1% of set rate at 2 sigma, based on approved applications and test requirements
Belt Width
300 mm ,to 600 mm
Feeder Length
1000 mm to 4000 mm inlet to outlet
Feed Rate
54 kg/hr to 25000
Belt Load
3 kg/m to 29.8 kg/m
Weigh Span
273 mm typical
Belt
To suit application.
Idlers
25.4 mm diameter stainless steel with sealed bearings
Head Pulley
38.1 mm diameter stainless steel with special chisel-shaped configuration
Speed Reducer
shaft mount
Scale Weighbridge
Dual load cell, single-idler, pivotless full-floating weighbridge
Conveyor
Cantilevered frame and quick release take-up for easy belt removal; Stainless steel construction; Customer may specify belt removal on either the left or right side
Load Cell
Dual, low capacity bending beam transducers
Load Cell Excitation
10 VAC/DC recommended, 20 VAC/DC maximum
Nonlinearity
0.02% rated output
Repeatability
0.01% rated output
Hysteresis
0.02% rated output
Temperature Sensitivity
Zero: 0.0014% rated output/°C (0.0008% rated output/°F) Span: 0.0014% load/°C (0.0008% load/°F)
Digital Speed Sensor
Type
Digital, brushless
Mounting
Direct to shaft
Housing
Weather-tight
Options
• Top covers
• Side covers
• Bottom covers
• Variable speed drives
• Flow/no-flow switches
• Plugged chute switches
• High temperature belts
• Shut-off/maintenance gates
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