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:

Valve technology for tyre presses
September 2019, Macsteel Fluid Control , Valves, Actuators & Pump Control
Production plants for tyres place extremely high demands on valves. Tyre curing presses work at high pressures of steam, water, and nitrogen, as well as at high temperatures. In addition, the very short ...

Read more...
Stafsjö valves protect installations
September 2019, Valve & Automation , Valves, Actuators & Pump Control
When it comes to industrial fire protection systems, reliability is essential. The system, which is often on constant standby for long periods, should be able to respond immediately and extinguish possible ...

Read more...
Innovation embedded in Metso’s DNA
August 2019, Metso South Africa , Valves, Actuators & Pump Control
Apart from the role in technology development, digitalisation is one of Metso’s key enablers to serve its customers better.

Read more...
Valves for molten sulphur or sulphur tail gas applications
August 2019, Valve & Automation , Valves, Actuators & Pump Control
Design engineers at Zwick have solved the ongoing problems experienced with valves on sulphur units. Typical valve problems on large bore line sizes range from seizing of the packing to severe seat damage ...

Read more...
ARCA anti-surge control valves in operation
August 2019, Valve & Automation , Valves, Actuators & Pump Control
Arca supplies its extensive range of valves to nearly all types of industries, but an important part of the product range are valves for turbines and turbo compressors, especially anti-surge control valves. ...

Read more...
Biffi Italia electric actuator launched
August 2019, Emerson Automation Solutions , Valves, Actuators & Pump Control
Biffi Italia, a leading manufacturer of high-performance and reliable valve actuation systems, has introduced the new Icon3000 electric actuator: a smart, powerful multi-turn actuator that offers improved ...

Read more...
New manifold valve design for pressure transmitters
July 2019, Emerson Automation Solutions , Valves, Actuators & Pump Control
Emerson has introduced a new manifold product family for its Rosemount pressure transmitters. Manifolds shut off or equalise pressure at the transmitter and also provide the critical mounting mechanisms ...

Read more...
Double-acting pneumatic cylinder
July 2019, Valve & Automation , Valves, Actuators & Pump Control
Stafsjö’s standard double-acting type SC pneumatic cylinder is manufactured by Ebro Armaturen. It has a solid construction and is designed for tough knife gate applications from 100 up to 320 mm bore ...

Read more...
Schubert & Salzer in control at PVS
May 2019, Macsteel Fluid Control , Valves, Actuators & Pump Control
Belgium-based PVS Chemicals produces extremely pure chemicals for use in the semiconductor industry. One of the company’s outstanding innovations is the production of ultra-pure sulphuric acid. As the ...

Read more...
Ball sector valves and sliding gate valves
Africa Automation Fair 2019 Preview, Macsteel Fluid Control , Valves, Actuators & Pump Control
Macsteel Fluid Control is exhibiting ball sector valves and sliding gate valves from Schubert & Salzer Control Systems at Stand D17.    The robust, efficient ball sector valves are capable of very precise ...

Read more...