SITRANS WW300 is designed for industrial applications such as mining, cement, chemical processing, pulp and paper, and other heavy-duty industries.
Field tested and proven in hundreds of applications, it enhances profitability by ensuring accuracy, enhancing blend consistency, reducing downtime, and improving accountability and record keeping. The unique weigh system reduces dead load and applies live load directly to load cells for accurate measurement. The dual load cells are externally mounted for easy access and maintenance.
It is available in a variety of lengths from 1.6 m (63 inch), belt widths from under 0.5 m (18 inch) to 1.8 m (72 inch), several different inlet configurations and materials of construction. It can be configured to suit various applications.
Standard components include CEMA C rated idlers, belt tracking rollers, hinged access panels on enclosed units, integral lifting points for easy installation, a belt scraper and plow for self-cleaning.
SITRANS WW300 is a medium- to high-capacity weighfeeder used for macro ingredient additives.
SITRANS WW300 dimensions in mm (inch)
SITRANS WW300 connections
Mode of operation |
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Measuring principle | Strain gauge load cells and digital speed sensor |
Typical application | Industrial and process applications in feeding, blending or rationing in gypsum manufacturing |
Measuring accuracy |
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Accuracy1) | ± 0.5 % or better |
Specified range | 10 ... 100 % based on speed |
Design rate range | 4.5 ... 800 t/h (5 ... 880 STPH) |
Max volumetric flow | 1 284 m3/h (44 800 ft3/h) |
Medium conditions |
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Operating temperature | -10 ... +55 °C (14 ... 131 °F) |
Material | Mild steel with stainless steel [304 (1.4301) or 316 (1.4401)], bead blast finish (1 ... 6 μm, 40 ... 240 μin) or abrasion resistant contact parts optional |
Load cells | |
Construction | 17-4 PH (1.4568) stainless steel or nickel plated alloy steel |
Degree of protection |
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Excitation | 10 V DC nominal, 15 V DC maximum |
Output | 2 mV/V |
Non-linearity | ± 0.02 % of rated output |
Non-repeatability | ± 0.01 % of rated output |
Capacity |
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Overload | 150 % of rated capacity |
Temperature |
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Speed sensor | |
Optical encoder output | RS 422 (TTL) 5 V DC, 150 mA max. 500, 1 000, or 2 000 ppr |
Temperature | -10 … +70 °C (14 … 158 °F) |
Degree of protection | IP64 |
WS300 Output | See page 4/43 (optional) |
C-flange mounted magnetic pulse generator output | Open collector, NPN, sinking output, max. 17 mA, 60 ppr |
Temperature | -40 … +105 °C (-40 … +220 °F) |
Degree of protection | IP67 |
Belt tracking switch | |
Aluminum spring rod (un-wired) |
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Temperature | -30 ... +85 °C (-22 ... +185 °F) |
Degree of protection | IP67 |
Framework |
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Pulleys | 200 mm (8 inch) minimum, 508 mm (20 inch) maximum, pulley diameter crowned with 6 mm (¼ inch) rubber lagging on drive pulley for maximum traction |
Idlers | Heavy-duty 100 mm (4 inch) CEMA C with precision ground ball bearings and triple labyrinth seals for longer life, CEMA D,E IMPACT where required |
Belt speed | 0.005 ... 0.36 m/s (1 ... 70 fpm) |
Bearings | 4 bolt flange style |
Belting |
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Belt tension |
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Belt cleaning |
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Drive motor | AC, TEFC, 10:1 CT inverter duty, drive motor with direct coupled flange mounted hollow bore KAF gear reducer, 1.2 service factor min. |
Shipping weight | 410 kg (900 lb) minimum |
Approvals |
Note: Weighfeeder as a whole is not approved for hazardous locations only electrical components. |
1) Accuracy subject to: On factory approved installations, the weighfeeder system’s totalized weight will be within the specified accuracy when compared to a known weighed material test sample. The test rate must be within the specified range of the design capacity and held constant for the duration of the test. The minimum material test sample must be equivalent to a sample obtained at the test flow rate for three revolutions of the belt or at least ten minutes running time, whichever is greater. Accuracy subject to: On factory approved installations, the weighfeeder system’s totalized weight will be within the specified accuracy when compared to a known weighed material test sample. The test rate must be within the specified range of the design capacity and held constant for the duration of the test. The minimum material test sample must be equivalent to a sample obtained at the test flow rate for three revolutions of the belt or at least ten minutes running time, whichever is greater.
Pulley diameter | Shaft diameter | Bearing diameter | Telescoper stroke | Infeed length | Skirtboard height |
8 inch | 2 ... 15/16 inch | 1 ... 15/16 inch | 6 inch | 16 inch | 8 inch |
10 inch | 3 ... 7/16 inch | 2 ... 7/16 inch | 6 inch | 24 inch | 10 inch |
12 inch | 3 ... 15/16 inch | 2 ... 15/16 inch | 9 inch | 30 inch | 12 inch |
14 inch | 4 ... 7/16 inch | 3 ... 7/16 inch | 9 inch | 36 inch | 14 inch |