www.worldpumps.com

WORLD PUMPS February 2013Product news8

Intelligent water solution software blockage helpVacon’s software package is now

available for NX series ac variable

speed drives. Specifi cally designed

to minimise the incidence of

pump blockages caused by

fouling and to clear any blockages

that do occur without the need

for manual intervention, the new

software provides anti-rag and

automatic fl ushing options, both

of which can be confi gured by

users to match the needs of their

application.

Operating in conjunction with the

PI control software that is a

standard feature of all NX series

drives, the anti-rag feature auto-

matically senses when the pump

is becoming blocked. It then

reverses the pump to clear the

blockage before restoring normal

operation. The user can set the

time for which the pump runs in

reverse and the maximum reverse

torque, which is often higher than

the pump’s normal operating

torque.

The number of anti-rag (reverse/

forward) cycles that the drive will

perform in an attempt to clear a

blockage can also be set. This

procedure is designed to clear a

high proportion of blockages but,

if the preset number of anti-rag

cycles is exceeded and the

blockage is still present, the drive

trips to prevent damage to the

pump.

To assist users in assessing the

benefi ts of using ac variable speed

drive technology, all NX series

drives have the ability to calculate

and display the value of energy

saved compared with fi xed-speed

motor operation.

www.vacon.com

Grundfos Challenge proceeds to Denmark

Grundfos hosted a fi rst-ever US

competition to give business and

engineering students the

Automatic and precise dosing of ink and sealantVerderfl ex® tube pump aims to

give automatic and precise dosing

of ink and sealant, 24 hours a day

every day at an automotive

industry supplier, Durban-based

Reliable Electrical Services, in

South Africa. There, the pumps

doses 64ml/min consistently at

40 rpm, around the clock.

The process has a direct bearing

on the quality of the fi nished

product as the combination of the

two substances is used to seal

windscreens. It ensures there is no

possibility of moisture ingress

between the two layers of glass

into which a tinted plastic lami-

nate sheet is inserted. Any imbal-

ance in the dosing would weaken

the seal and result in the clarity of

the windscreen being

compromised.

In addition to pigment and glue

dosing, the dosing pumps are

used for coatings and acid transfer

and to feed lapping solution.

Remote stop/start and speed

Verderfl ex® tube pump with brushless dc

motor, provides fl ow rates from 0.8 to 1312 ml/

min at speeds from 10 to 250 rpm.

control allows the pumps to be

integrated into the automated

windscreen sealing system.

This model of Verderfl ex® tube

pump with brushless dc motor

provides fl ow rates from 0.8 to

1312 ml/min at speeds from 10 to

250 rpm. Speed and fl ow rate are

infi nitely variable and the value of

all adjustable parameters are indi-

cated on a keypad with twin line

alpha numeric display. The pumps

are also stackable, self priming and

can run dry.

www.verderfl ex.com

opportunity to design solutions for

managing the world’s scarce water

resources.

The Grundfos Challenge took

place 15-16 November at the

company’s facility in Olathe, Kansas

US, while other regional events

occurred simultaneously at

Grundfos facilities in Denmark and

China.

Each team developed a plan to

reduce overall water consumption,

decrease the energy needed to

transport and purify water,

increase the reliability of water

networks, and shrink the cost of

handling and using water.

The students competed against

teams from other universities to

turn theoretical knowledge into a

practical business strategy that

was supported by sound engi-

neering schematics. A test of

talent, ingenuity and teamwork,

the Challenge provided partici-

pants with an important platform

for innovation.

Two business teams and two engi-

neering teams were chosen to

represent the US in a global

competition in Denmark, Grundfos’

home country, in March 2013 for a

weeklong fi nal competition against

their Chinese and Danish

counterparts.

The teams were judged on stra-

tegic focus and technical or busi-

ness acumen by panels of internal

and external experts.

The Challenge began in Bjerringbro,

Denmark in 2006 to highlight the

importance of cooperation

between the business community

and educational institutions.

www.grundfos.us

WOPU0213_Product News 8 04-02-13 09:40:08