www.ari-armaturen.com

New ARI ZETRIX process valve makes a remarkable debut:

Wien Energie supplies power „just in time“.

Annual CO

saving of 11,000 tons predicted!

Power has to be available whenever it is needed – regardless

of when it is actually generated. This has always been a pro-

blem in the past with alternative energy sources. Wien

Energie, the Vienna energy service provider, has now achie-

ved a major breakthrough. Since 2014, the world‘s first high

pressure, high temperature accumulator of its kind has pro-

vided thermal energy equivalent to around 145,000 megawatt

hours a year – absolutely flexibly according to demand at any

time of the day or night – and simultaneously reduced CO2

emissions by 11,000 tons. Twenty-seven new ARI ZETRIX

process valves in DN 300 and DN 400 are on board. These

valves feature a triple offset (3-ex) design, metal seal and

self-aligning sealing ring. The advantage: permanent leak-

proofness, durability and exceptional versatility for isolation

and control even in harsh industrial environments.

The heat accumulator in Simmering is the first ever to have been

built for such a complex high pressure, high temperature district

heating network. The aim is to separate heat production from

heat consumption and minimise the need for peak load boilers

when demand for electricity and heat is heaviest. The system

optimises the use of combined heat and power plants, thermal

waste treatment facilities and distributed electricity generators

by renewable energy.

CO2 emissions are reduced and daily district cooling peaks

balanced out during the summer months. The altitude

difference in Vienna‘s district heating

network, which has a total length of

720 miles, is up to 500 feet. The

hot water for heating and warm

water is therefore transported

at high pressure and tempera-

tures between 95 and 150 degrees Celsius. The accumulator is

charged for approximately 2200 hours a year and discharged for

another 2200. The quantity of heat that is stored every year and

later withdrawn to meet demand is in the order of 145,000

megawatt hours – equivalent to the annual consumption of

some 20,000 typical households.

The new ZETRIX process valve plays a key role in this innovative

technology concept. Its 3-ex design ensures a frictionless swivel

movement of the sealing ring into the seat

and hence a maximum closing force with

minimum effort. The metal seal principle

provides permanent leakproofness.

The self-aligning sealing ring guarantees

tightness conforming to leakage rate A

on both sides in accordance with DIN EN

12266 regardless of temperature varia-

tions. Numerous additional safety options

are also incorporated.

All in all, this represented a truly remarkable debut for the

new ARI-ZETRIX, which makes a valuable contribution to

the Simmering project – the first of its kind in the world.