Valves, Actuators & Pump Control


Diffuser plates reduce noise

July 2014 Valves, Actuators & Pump Control

Mitech’s locally manufactured diffuser plates are designed for use with its globe control valves on high pressure drop applications for gases and vapours, greatly reducing the noise level generated by the gas or vapour flow. A properly selected diffuser valve combination can result in up to a 40 dBA noise reduction.

Installed downstream from the valve, the diffuser plates are designed to create a back pressure at the valve. On high pressure drop gas applications the valve size is selected to maintain the velocity at the outlet within the limit of Mach 0,33 (1/3rd of sonic). By creating a back pressure the gas or vapour is more compressed and therefore a smaller valve can be selected and still keep the velocity within acceptable limits.

Special trims such as low noise or ED disk stack are still often required inside the valve as the downstream plate is not effective at creating back pressure at low flow rates. In these conditions the valve sees the full pressure drop. However, the velocity in the smaller valve is still acceptable due to the lower flow rate.

Usually the valve size can be reduced to less than half what it would have been without the plate, resulting in significant savings, particularly when the sizes involved are large. Several diffuser plates can be installed in series in an expanding pipe work system, or they can be built into a single holder for ease of installation.

A typical application that can utilise this technology is a steam pressure reducing station.

For more information contact Pieter Badenhorst, Mitech, +27 (0)11 657 6000, enquiries@mitech.co.za, www.mitech.co.za





Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Valves for pump protection
July 2020, Valve & Automation , Valves, Actuators & Pump Control
Thyssenkrupp Steel Europe has opted for Schroeder pump protection valves during the recent overhaul of Unit 4 of its power station in Duisburg. The valves that were installed previously from another supplier ...

Read more...
Stafsjö MV standard knife gate valve
July 2020, Valve & Automation , Valves, Actuators & Pump Control
Do you want to try the MV performance? The MV is an all-round valve with a proven global track record both on dry solids and wet fluids. The valve’s ideal internal clearances lower friction and make it ...

Read more...
Advanced pump control
July 2020, Instrotech , Valves, Actuators & Pump Control
Factory automation continues to develop year on year and pumps are increasingly required to supply real-time operating data to control networks so that their performance can be monitored and adjusted ...

Read more...
Festo online configurator tool simplifies sizing of process valves
April 2020, Festo South Africa , Valves, Actuators & Pump Control
From manually operated to automated process valves, the new configurator tool for process valves from Festo makes selecting the right solution easy and less time-consuming.

Read more...
Early detection of faults in BMW’s light metal die casting
April 2020, Macsteel Fluid Control , Valves, Actuators & Pump Control
Sliding gate valves from Schubert & Salzer optimise process reliability.

Read more...
All around the turbine
April 2020, Valve & Automation , Valves, Actuators & Pump Control
At the heart of a power station are the steam turbines, which serve as generators or mechanical drives for pumps und compressors. For their operation, a network of valves is built around the turbines. ...

Read more...
Monoblock for sampling and injection processes
March 2020, WIKA Instruments , Valves, Actuators & Pump Control
WIKA’s new monoblock has been designed to meet the requirements of the process industry. It is especially well suited to applications in natural gas and aggressive media. The compact design integrates ...

Read more...
Digital transformation enables new solutions for valves and pumps
March 2020 , Valves, Actuators & Pump Control
With the emergence of IIoT-enabled remote management solutions, process industry end users can begin to take full advantage of remote monitoring, analysis, and management services provided by valve and pump suppliers or third-party service providers.

Read more...
Flow control valves from BMG
February 2020, Bearing Man Group t/a BMG , Valves, Actuators & Pump Control
BMG’s Fluid Technology division supplies and supports an extensive range of components for fluid technology systems and general industrial applications. These products include valves, hydraulic hoses ...

Read more...
Large anti-surge control valves from ARCA
February 2020, 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...