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SITRANS WW200 has been field tested and proven in hundreds of applications.

The unit can be customized to meet exact application needs. Stainless or mild steel units are available in open or enclosed styles. Custom lengths, belt types, inlet configurations, drives, and other options are available to meet your requirements.

The MS (mild steel) model is ideal for use with chemicals, powders, or any granular product in applications not requiring wash-down. The SD (sanitary duty) model is designed for the food industry where high pressure wash-down is required. It meets all USDA and FDA requirements.

Its cantilevered mechanical design provides for quick belt removal and easy maintenance. It is designed to eliminate material build-up, ensuring high accuracy and reliability. The unique weigh system reduces dead load and applies live load directly to two platform load cells. Load cells are externally mounted for easy access and maintenance.

Standard components include an anti-static food grade belt option, horizontal slider bars for self-cleaning and minimal product
build up, belt tracking rollers, belt scraper, and plow for self-cleaning. 

Обзор

SITRANS WW200 is a low- to medium-capacity weighfeeder used for minor ingredient additives.

Чертеж

SITRANS WW200 dimensions in mm (inch)

 

Особенности

 

  • High accuracy
  • Ideal for low- to medium-capacity loads
  • Fast installation, easy to clean and maintain
  • Flexible, rugged design allows configurations to suit many applications
  • Quick delivery on standard units 
  • Outboard mounted load cells with protective cover

Схема подключения

SITRANS WW200 connections

Технические данные

 

Mode of operation

 

Measuring principle

Strain gauge load cells and digital speed sensor

Typical application

Control and monitor feed rates and blending of minerals or powdered additives into a process

Measuring accuracy

 

Accuracy1)

± 0.5 % or better

Specified range

10 … 100 % based on speed

Design rate range

0.45 … 100 t/h
(1 000 lb/h … 110 STPH)

Max volumetric flow

220 m3/h (7 700 ft3/h)

Medium conditions

 

Operating temperature

-10 … +55 °C ( 14 …  131 °F)

Material

Mild steel or stainless steel [304 (1.4301) or 316 (1.4401)], bead blast finish (1 ... 6 μm, 40 ... 240 μin)

Load cells

 

Construction

17-4 PH (1.4568) stainless steel or nickel plated alloy steel

Degree of protection

  • Stainless steel: IP68
  • Nickel plated alloy steel: IP66

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

  • Stainless steel range: 6, 12, 30 kg
  • Nickel-plated range: 10, 15, 20, 30, 50 kg

Overload

150 % of rated capacity

Temperature

  • Operating range: -40 … +65 °C (-40 … +150 °F)
  • Compensated: -10 … +40 °C (15 … 105 °F)

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

  • Standard: IP64
  • Stainless steel: IP66

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)

  • 1 NO, 1 NC switch blocks
  • Rated operating voltage 600 V AC max.

Temperature

-30 ... +85 °C (-22 ... +185 °F)

Degree of protection

IP67

Framework

  • Precision machined, stainless [304 (1.4301) or 316 (1.4401)] or mild steel
  • Cantilevered design for easy belt replacement

Pulleys

152 mm (6 inch) diameter with 6 mm (¼ inch) neoprene lagging

Belt speed

0.005 … 0.36 m/s (1 … 70 fpm)

Belt support

Edge of flat bar eliminates material buildup

Bearings

  • 2-bolt flange mount on drive pulley
  • 2-bolt threaded base pillow block on driven pulley

Belting

  • Static control with vulcanized endless finger splice for maximum weighing consistency (standard)
  • Maximum rated material temperature 82°C (180°F)
  • Silicone HT belt rated for max. material temp. of 177°C (350 °F)
  • Nitrile belt rated for a max. material temp. of 121 °C (250 °F)

Belt tension

Screw type, telescoper module with 150 mm (6 inch) travel - mild or stainless steel 304 (1.4301)

Belt cleaning

  • UHMW blade type with spring tensioning at head pulley
  • Return plow
  • Cleaning brush, optional

Drive motor

AC, TEFC, 10:1 CT inverter duty, drive motor with direct coupled flange mounted hollow bore CAF48 gear reducer ,1.2 service factor min.  

Shipping weight

280 kg (600 lb) minimum

Approvals

  • Stainless steel options meet USDA and FDA requirements for food processing
  • CE on all electrical components Hazardous approvals per configuration options

Note: Weighfeeder as a whole is not approved for hazardous locations only electrical components.



1) Accuracy subject to: On factory approved installations the weigh feeder 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.

Reduction

(X:1)

Speed

60 Hz

fpm

50 Hz

fpm

60 Hz

m/s

50 Hz

m/s

1059:1

max.
min.

2.89
0.29

2.41
0.24

0.015
0.002

0.012
0.001

937:1

max.
min.

3.27
0.33

2.72
0.27

0.017
0.002

0.014
0.001

865:1

max.
min.

3.54
0.35

2.95
0.30

0.018
0.002

0.015
0.002

745:1

max.
min.

4.11
0.41

3.43
0.34

0.021
0.002

0.017
0.002

677:1

max.
min.

4.52
0.45

3.77
0.38

0.023
0.002

0.019
0.002

615:1

max.
min.

4.98
0.50

4.15
0.42

0.025
0.003

0.021
0.002

558:1

max.
min.

5.49
0.55

4.57
0.46

0.028
0.003

0.023
0.002

508:1

max.
min.

6.03
0.60

5.02
0.50

0.031
0.003

0.026
0.003

449:1

max.
min.

6.82
0.68

5.68
0.57

0.035
0.004

0.029
0.003

414:1

max.
min.

7.40
0.74

6.17
0.62

0.038
0.004

0.031
0.003

357:1

max.
min.

8.58
0.86

7.15
0.72

0.044
0.004

0.036
0.004

324:1

max.
min.

9.45
0.95

7.88
0.79

0.048
0.005

0.040
0.004

320.67:1

max.
min.

9.55
0.96

7.96
0.80

0.049
0.005

0.040
0.004

284.7:1

max.
min.

10.76
1.08

8.97
0.90

0.055
0.006

0.046
0.005

249.6:1

max.
min.

12.27
1.23

10.23
1.02

0.062
0.006

0.052
0.005

223.36:1

max.
min.

13.71
1.37

11.43
1.14

0.070
0.007

0.058
0.006

198.25:1

max.
min.

15.45
1.55

12.88
1.29

0.079
0.008

0.065
0.007

173.73:1

max.
min.

17.63
1.76

14.69
1.47

0.090
0.009

0.075
0.008

152.75:1

max.
min.

20.05
2.01

16.71
1.67

0.102
0.010

0.085
0.009

138:1

max.
min.

22.20
2.22

18.50
1.85

0.113
0.011

0.094
0.009

120.25:1

max.
min.

25.47
2.55

21.23
2.12

0.130
0.013

0.108
0.011

108:1

max.
min.

28.36
2.84

23.63
2.36

0.144
0.014

0.120
0.012

97.5:1

max.
min.

31.42
3.14

26.18
2.62

0.160
0.016

0.133
0.013

88.4:1

max.
min.

34.65
3.47

28.87
2.89

0.176
0.018

0.147
0.015

80.44:1

max.
min.

38.08
3.81

31.73
3.17

0.193
0.019

0.161
0.016

71.12:1

max.
min.

43.07
4.31

35.89
3.59

0.219
0.022

0.182
0.018

65.68:1

max.
min.

46.64
4.66

38.86
3.89

0.237
0.024

0.197
0.020

56.55:1

max.
min.

54.17
5.42

45.14
4.51

0.275
0.028

0.229
0.023

51.41:1

max.
min.

59.58
5.96

49.65
4.97

0.303
0.030

0.252
0.025

46.93:1

max.
min.

65.27
6.53

54.39
5.44

0.332
0.033

0.276
0.028

42:1

max.
min.

72.93
7.29

60.77
6.08

0.371
0.037

0.309
0.031

37.28:1

max.
min.

82.16
8.22

68.47
6.85

0.417
0.042

0.348
0.035



 

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