Continuous operation weighers

The continuous operation weighers DNVD-650 are used for dosing powder and fine materials and can be used in different brunches of industry.
Dosing materials – loose batch components with angle of friction no more than 60, humidity no more than 5 and with particle size no more than 30 mm. 
 

Parameters	DNVD-650/PV8S-0,5/1,2	DNVD650/PV8S-0,5/1,6	DNVD-650/SH-0,25/1,5
The biggest limit of proportioning (NPP), t/h (m3/h)	63(36)*	63(36)*	63(36)*
The lowest limit of proportioning (NmPP), % from NPP	20	20	20
Limit of permissible proportioning error in mode of conveyor weighs, %	+1	+1	+1
Type of weighing conveyor	KLM-650-3000	KLM-650-3000	KLM-650-3000
Width of conveyor belt, mm	650	650	650
Length between axes of pulley drive and tense stations, mm	3000	3000	3000
Drive pulley diameter, mm	215	215	215
Speed of belt moving, m/s	0,58	0,58	0,58
Energy input of conveyor, kW	1,5	1,5	1,5
Type of feeding device	PV8S-0,5/1,2	PV8S-0,5/1,6	Screw with changeable step
Dimensions of feeder tray, (width/height), mm	474/256	474/256	-
Screw diameter of feeding device, mm	-	-	250
Length between axes of feeding device loading and conveyor loading, mm	1000	1485	1561
Energy input of feeder, kW	1,0	1,0	4,0
Inclination angle of feeder	8 degrees	8 degrees	10 degrees
Voltage, V	380	380	380
Utility frequency, Hz	50	50	50
Weight of dosing unit, no more than, kg	850	950	995

* – Output in fact depends of properties of transport material, transport conditions and specifies during de-sign process; there is output for material with density 1,75 t/h.

Weighers DNVD-650 consist of the following devices:

• Feeding device (vibrating feeder or screw)
• Small size belt conveyor
• Weigher cap (DNVD-650/PV8S-0,5/1,2 and DNVD-650/PV8S-0,5/1,6) or junc-tion pipe with flexible connector (DNVD-650/SH-0,25/1,5)
• Hinged conveyor carriage
• Strain measuring suspender
• Suspension frame
• Control device

Feeding device with controlled output deliver the material on the belt of weighing conveyor.
Indicator of speed (encoder), connected with movable pulley axle tree, gives im-pulse signal during tape transport on definite value.
Strain measuring suspender test weight of conveyor with material and give the present meaning of weight load in control device to count weight of material, passed through conveyor.
Container and scaling factor of weighing device installs during weigher settings in-stallation (calibration check and test).
During the use of weigher for supplying certain dose of material, the concrete or-der is supported. This order allows managing the value of allowance, which provide measuring error elimination connected with loosing of material when the feeding device is switched of.

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