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WORLD PUMPS June 2013Product news6

Test success for CUP-TWL turbine-driven design

Dewatering design for lower head applications

Multistage series off ersInlet/outlet ports in-line

ClydeUnion Pumps, an SPX Brand,

and GE Hitachi Nuclear Energy

(GEH) brought together fi ve utility

companies in February 2013 to

witness the submergence tests of

the CUP-TWL, a turbine-driven

safety pump used in both Pressu-

rised Water Reactors (PWR’s) and

Boiling Water Reactors (BWR’s).

The two eight-hour submergence

tests, conducted in Glasgow, UK,

demonstrated that it is possible for

a hot running pump, under simu-

lated fl ooding conditions, to

continue to run for the full test

period with no change in funda-

mental performance or detri-

mental damage. The tests took

place at SPX’s 76,000 sqm facility,

where engineers operated the

CUP-TWL in a purpose built tank

Xylem’s Godwin brand launched a

new automatic, self-priming dewa-

tering pump specifi cally designed

for lower head dewatering applica-

tions. The pump was unveiled for

the fi rst time at the Bauma trade

show in April, in Munich, Germany.

Designed for easy movement and

transport, Xylem’s Godwin Vac-

Prime is compact and does not

require specialist transport. With its

lifting frame, fork pockets and

optional wheels, it needs minimal

on-site equipment. The speed of

air evacuation that it delivers is

Caprari has launched its new

range of multistage vertical electric

pumps in stamped and welded

stainless steel with inlet/outlet

ports in-line.

The Directive 2009/125/EC, better

known as the ErP Directive, offi -

cially came into force on

01/01/2013. This Directive obliges

pump manufacturers to market

products that are increasingly

performance-oriented with respect

to energy effi ciency.

The motors coupled to the new

hydraulic parts comply with IE2

effi ciency class, in accordance with

the classifi cation of standardized

surface motors established by

Regulation 640/2009.

Constructively the machines are

characterized by robustness, and

inoxibility of massive parts: all

parts in contact with liquid are

made of stainless steel, the

massive parts in cast iron are

protected and painted by means

of cataphoretic coating process.

The electric pumps have the certi-

fi cation for use with drinking water

in accordance with national laws.

The fl anges design has been

refi ned to facilitate the connection

designed to simulate fl ood

conditions.

The test began with fl ooding the

CUP-TWL with cold water, starting

it with design steam conditions, and

conducting a series of perform-

ance tests and an emergency stop/

start while submerged. The test

tank was then drained while the

unit continued to run and the

temperature of the unit was allowed

to stabilise with the steam supply at

290°C (554°F) before rapidly fl ooding

the tank with cold water. A second

performance test was then

conducted with a total of eight

hours submerged running with no

reduction in performance or integrity.

www.spx.com

www.ge-energy.com/nuclear

CUP-TWL pump under test.

The new range of multistage pumps is

characterized by robustness.

Godwin Vac-Prime dewatering pumps have been designed for easy movement and transport.

due to a combination of the

vacuum pump and the fast-

priming system.

Godwin Vac-Prime 4 in and 6 in

models can manage heads of

11-25 m, fl ows of 100-374 m³/h

and solids handling of 45–75 mm.

The fully automatic, self-priming

pump is designed for a range of

applications including draining

canals, dewatering open excava-

tions, basements, quarries,

pumping water containing solids,

pumping bentonite and drilling

muds well as well-pointing. The

pump comes with a durable, cast

steel impeller to aid shatter-

resistance.

The Godwin mechanical seals run

in an oil bath which dissipates the

heat allowing for dry-running

without seals over-heating and

cracking. The wet end Xylem’s

Godwin Vac-Prime is based on the

design of larger Godwin Dri-Prime

pumps.

www.xyleminc.com

to the pipes: the fl anges, in fact,

are of the fl oating type.

Caprari has introduced the confi g-

uration for the CVX Energy with

integrated CapDRIVE frequency

changer directly mounted on the

machine.

www.caprari.com

WOPU0613_Product news 6 04-06-13 09:20:58