Valves, Actuators & Pump Control


Desuperheating stations utilise spillback nozzle

March 2000 Valves, Actuators & Pump Control

Mitech's desuperheating stations utilise a spillback nozzle to provide accurate temperature control over a wide range of conditions.

The principle of the spillback nozzle is that high pressure water is piped to the nozzle and what is not required for cooling, is returned through a control valve to a condensate return line. To add more water to the steam, the control valve is closed.

The advantage of this system, compared with a conventional spray nozzle, is that the spillback unit experiences high-pressure water at all conditions which ensures good atomisation. In a conventional system, the control valve is in the supply line and if only a small amount of water is required, most of the available pressure is dropped across the valve.

The nozzle cannot perform well with low water pressure, resulting in poor atomisation, bad temperature control and the likelihood of thermal cracking of the downstream pipework.

Further advantages of the Mitech spillback desuperheater are: no moving parts in steam flow; lightweight; high turndown; relatively low cost; quick deliveries; low maintenance; local support from manufacturer; and a two year guarantee.

Mitech desuperheaters have been used in pulp and paper mills, steel mills, fertiliser companies and in a syrup plant. Mitech can supply complete pressure reducing desuperheating stations by combining the spillback desuperheater with their low noise control valve.



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Eliminate bearing failures in TOVs
August 2021, Valve & Automation , Valves, Actuators & Pump Control
Bearing failures are among the highest root causes of failure in triple offset valves (TOV) for tight shutoff applications. This issue is directly attributed to the need to have metal bearings with very ...

Read more...
Locally manufactured knife gate valves
August 2021, Bearing Man Group t/a BMG , Valves, Actuators & Pump Control
BMG and Abrasive Flow Solutions (AFS) play a major role in the local valves sector, through the design, distribution, supply and support of a broad range of slurry related valves.

Read more...
Protect your pump and keep it longer
July 2021, Elemental Analytics , Valves, Actuators & Pump Control
Unexpectedly losing a pump is often an expensive or even a dangerous problem in a chemical plant.

Read more...
Locally valves manufactured for tailings pipeline
June 2021 , Valves, Actuators & Pump Control
The AFS manufacturing plant in Benoni is equipped with advanced equipment and is supported by specialists who offer dependable technical support to ensure the optimum safety, efficiency and extended service life of every system.

Read more...
New flange monoblock with shut-off valve
March 2021, WIKA Instruments , Valves, Actuators & Pump Control
WIKA’s new monoblock with flange design integrates a shut-off valve to separate the process from the instrument side.

Read more...
The Stafsjö HX story – greater demand calls for action
February 2021, Valve & Automation , Valves, Actuators & Pump Control
As a knife gate valve supplier, Stafsjö supplies product solutions to realise efficiency and production goals in pulp and paper applications.

Read more...
Drives for solar-powered pump systems
February 2021, Bearing Man Group t/a BMG , Valves, Actuators & Pump Control
BMG advises on how to optimise efficiency and extend the service life of solar-powered pumping systems by selecting the correct drives.

Read more...
Optimise fermentation in alcoholic beverage manufacturing through proper valve selection
February 2021, ASCO , Valves, Actuators & Pump Control
Emerson can help select the right fluid automation products to meet all unique requirements.

Read more...
Smart positioners of the future
January 2021, SMC Corporation South Africa , Valves, Actuators & Pump Control
SMC’s new range of Smart Positioners was designed to pair perfectly with a variety of process control valves and actuators.

Read more...
Robust control valve proves itself in the construction materials industry
November 2020, Macsteel Fluid Control , Valves, Actuators & Pump Control
Ball sector valves from Schubert & Salzer excel in abrasive slurry applications.

Read more...