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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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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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,

Vibrating Cleaning Screen, Magnet Separator2. All kinds of conveying equipments, such as en-mass Conveyor, Belt Conveyor,

Chain Conveyor, Bucket Elevator, Screw Conveyor etc3. Manufacture and installment of stainless steel nonstandard equipment

www.hualiang.com.cn/english

Tel:+86-515-85315666 Mob: +8613905110028 Fax: +86-515-85314485 [email protected]

12 Weiyi Rd, Economy Development District Dongtai, Jiang su Prov., China, 224200

Jiangsu Hualiang Machinery Co., Ltd

IndentedCylinder Separator

Rice Selecting Grader

(Length Grader)

ConveyorSystem

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RospenIndustriesrangeof continuous

weighingequipment

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rospen industries’ range of continuous weighing equipment for the grain and feed milling sector

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