District heat

District heat is produced mainly by cogeneration in large power plants, small combined heat and power (CHP) plants, waste incineration plants or district heating plants. It can be generated using fossil fuels or fuels from renewable resources as well as from waste heat, and it represents an important instrument for achieving climate protection targets in the framework of the energy turnaround. Cogeneration using combined heat and power enables energy to be utilised in an environmentally compatible way and makes particularly sparing use of resources.

Owing to the high capacities, nominal diameters >1000 mm are often essential. ARI valves guarantee trouble-free operation through premium quality and durability.

They are ideally suited in the following areas:

• Transformer substations
• Heat accumulators
• Pumping stations / distribution centres  

Twenty-seven large-diameter ZETRIX process valves were installed in 2014, for instance, in the world's first high pressure, high temperature accumulator of its kind in the Simmering district of Vienna. The accumulator provides 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 reduces CO2 emissions by 11,000 tons.