rospen industries’ range of continuous weighing equipment for the grain and feed milling sector
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8/7/2019 Rospen Industries range of continuous weighing equipment for the grain and feed milling sector
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8/7/2019 Rospen Industries range of continuous weighing equipment for the grain and feed milling sector
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Rospen Industries, being the
UKs leading supplier of high
precision weighing and metering
systems for powders, granules and
liquids, have developed a full range of
continuous weighing systems, answering
to customer requirements in the
grain and feed milling sector.
The company has been working with
customers in the industry for many years andthis has led to the development of a range
of equipment, which encompasses products
of specific relevance to companies operating
in the sector.
These products provide basic, in-line con-
tinuous weighing capabilities at an effective
price point for grain and feed customers. As
more customers in this sector become highly
automised, their production lines increasingly
demand continuous weighing as a prereq-
uisite.
Rospens continuous weighing range can
both measure and control the throughput
of material, with accuracy and reliability
built in.
Weigh beltThe Rospen weigh belt range encompass-
es three model ranges of weigh belts that
have been designed to meet varying needs.
The principle of operation is slightly differ-
ent on the three models:
Enclosed weigh beltThis consists of a short variable speed
belt, a section of which is supported by a
load cell mounted weight bar. The product isfed onto the belt by gravity via a chute from
a storage hopper. The resulting signal from
the weighed section of belt is directly pro-
portional to the weight of product passing
over the belt and this is transmitted to the
LBC2000 microprocessor c ontroller.
Open type and miniature weighbelts
These consist of a weigh frame and a
fixed-speed belt, which is totally weighed.
The weight of the unit is tared to zero,
such that only the product passing over
the belt is weighed. The product weight
signal is measured by the microprocessor
and the resultant correction signal is used
to speed up or slow down a product
pre-feeder to bring the weight of product
on the belt back to the pre-set rate.
This method has the advantage that the
product is positively fed onto the belt
thus avoiding bridging or rat-holing in the
hopper.
Special features
Feed rated of 1 to 50,000 kg/hr.Accurate to better than +- 0.25 percent
Continuous uninterrupted weighing
accurate to +- 0.5 percent
Automatic tare and ranging
Three models:
- Totally enclosed: giving dust tight
control of toxic or hazardous
materials
- Open type: giving visual inspection
on process lines
- Miniature: 50 mm wide with range as
low as 10 to 800g/min:
Easy strip feature
Instant response with no process lag
Small installation space required
Rospen Industries range of
continuous weighing equipmentfor the grain and feed millingsector
Gi&fd milliG tcholoG24 | January - february 2011
FEATURE
Enclosed screw weigherRospens enclosed screw weigher has
been designed to meter and weigh dusty,
aggressive or toxic powders to continuous
accuracies of 0.5 percent at rates of up to
55 tonnes per hour. It will also provide a fail-
safe positive indication of material flow-rate
change, change in density or moisture level,
or change in material characteristics.
The output signal from the weight con-
troller can also be used to initiate an error
alarm, indicate flow rate, totalise flow or con-
trol the output of other metering devices in
ratio. By this method, the outputs of several
product metering feeders or liquids pumps
can be ratioed together and held to closetolerances.
The machine consists of a screw type
pre-feeder which pre-conditions and
meters the product by volume into a
short weigh screw, which is turning at a
variable speed, through which the product
is conveyed.
The weigh screw is supported on weight
transducers.
Special features Continuous, uninterrupted weighing
accurate to 0.5 percent
Totally enclosed giving dust tight control
Insensitive to shock or vibration
Easy to strip and maintain
Instant response without process lag
Low maintenance
Small installation
space required
Solo flow meterThe SOLO range
of impact plate flowm-
eters has been designed
to provide the optimum
cost-effective solution
for measurement and
display of flow through
a process to accuracies
of +- 1 percent.
Flow rates from 100
kg/hr to 250 tonnes/hr can be measured via
open or closed designs.
The SOLO is available
in a choice of stainless
or mild steel enclosures
and alternate impact
plate coatings suitable
for a wide variety of
applications.
Free flowing mate-
rial is directed onto the
impact plate and then onto the process. The
impact force is measured in the horizontal
plane only, thus static material build-up has
no effect and there is no zero drift. The
horizontal force measurement is converted
electronically to a proportional flow rate
signal and is continuously displayed as kg
per hour.
Special features Feed rates of 50 to 200000 kg/hr -
accurate to better than +- 1 percent
Gi&fd milliG tcholoG January - february 2011 | 25
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8/7/2019 Rospen Industries range of continuous weighing equipment for the grain and feed milling sector
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This cycle is repeated at frequent
and regular intervals, transferring product
from the hopper into the process in a
pulse-like action. Flow rate is calculated by
monitoring the gain in weight inside the
hopper each time the valve is closed in
relation to time. An approximated rate of
flow through the process while the valve
is open is automatically calculated by the
LBC1000 controller, which then displays
overall flow rate in kilograms per hour/or
kilograms total.
Special features Simple to integrate in vertical process
High accuracy due to discreetweighments
Continuous and intermittent operation
100 to 20000 kg/hour
Vibo flow meterThe new VIBO flow meter range offers
an alternative method of continuous proc-
ess weighing which is ideal for applications
where hygiene or ease of cleaning is impor-
tant.
VIBO measures the flow of any powder
or bulk products as it passes along a stainless
steel vibratory tray conveyor and is a use-
ful alternative to continuous weigh belt or
screw systems.
The system comprises an electro or
mechanically driven vibratory tray c onveyor
mounted onto a Rospen Boss-Mount weigh-
frame.Since there are no moving or wearing
parts maintenance is kept to a minimum.
In operation the weight of the conveyor
is tared off, thus enabling the weight of the
product in the tray conveyor to be continu-
ously and precisely measured. The system
is controlled by a Rospen controller, which
displays the conveying rate as kilograms per
hour and total output in kilograms as well
as providing high and low flow rate alarm
facilities.
Because the controller has a closed loop
control facility, it is possible to maintain
a constant weight of product in the tray
conveyor by modulating delivery from the
pre-feeder, thus VIBO can be used both as
an uncontrolled flowmeter and as a constant
weight feeder.
Special features Feed rates of 50 to 50,000 hg/hr -
accurate to better than +- 1 percent
Mechanically simple and robust
Easy to clean and maintain
Designed for dimensional compactness,
PULSO is ideal for applications where space
is at a premium. Its simplicity of installation
makes its similarly convenient for retrofit
applications where enhanced monitoring
facilities are required.
PULSO is a gravity fed batch weigh hop-
per mounted on a weighframe and fitted
with a pneumatically operated discharge
valve controlled by a Rospen LBC1000
controller.
As material flows into the hopper the
weight rises. At a predetermined value the con-
troller triggers the pneumatically operated valve
to release the material collected in the hopper.
Dust tight enclosure
No moving parts
Easily installed
Low cost
Low maintenance
Rugged design
Pulso flow meterA simple and precise, yet low cost solu-
tion for calculating time based consumption
of material through a continuous process,
the new PULSO flowmeter from Rospen
Industries can be used to measure flow rate
of powder, granules and even piece parts
under free flow.
If you operate in the grain or feed
milling sector and wish discuss any of
your handling or process issues with
Rospen Industries, please call them on
+44 161 304 5700, or visit website
www.rospen.com.
Gi&fd milliG tcholoG26 | January - february 2011
FEATURE
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8/7/2019 Rospen Industries range of continuous weighing equipment for the grain and feed milling sector
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We manufacture a comprehensive range of quality machinery suitable forall areas of the Grain, Feed and Milling industries.
Main products and service:1. Indented Cylinder Separator, Length Grader, Thickness Grader, De-stoner,
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