PC-OCT23-PG14-15.1_Layout 1 03/10/2023 10:04 Page 15


PUMPS, VALVES & ACTUATORS


promote rapid heat transfer. The atomized, pre-heated water is introduced via a combining tube where it is atomized and then passed through a converging-diverging venturi throat section. The hot atomized water exits the atomizing head and is rapidly evaporated, cooling the main steam flow. Because this method of water introduction does not rely on surrounding steam velocity or turbulence for effective mixing, it gives very high turndowns - generally in excess of 100:1. In terms of design, the DSCV-SA has a


evaporation and desuperheating process. Equally important is the finely atomized incoming cooling water. Very fine atomization produces extremely small water droplet sizes with a vastly increased surface area to


standard body-to-bonnet joint, up to ANSI 900#, which is bolted and incorporates a fully enclosed spiral wound gasket made from 300 stainless steel with graphite filler. For pressure ratings above ANSI 900# a pressure seal bonnet closure is employed, which utilises a graphite sealing ring. The DSCV-SA is available in an almost infinite range of sizes, materials and pressure ratings as each valve is tailored to suit particular customer requests and requirements. The valve can be fully rated or split rated


and is available in standard, special or intermediate classes. Standard classes are available up to and including ANSI 4500# and intermediate and special class designs can


be accommodated where required. Modern steam turbine bypass systems must


be able to react and modulate very quickly under emergency conditions such as a turbine trip. Stroking speeds of less than one second may be required and as a result, the DSCV-SA can be supplied with either pneumatic or hydraulic actuation to meet this critical requirement. Importantly, the DSCV-SA is not a high


maintenance valve. The complete trim is a ‘Quick-Change’ style with no welded-in components or large internal threaded parts. The whole trim assembly is held in compression by either a compression ring or the bonnet. Simply removing the compression ring or bonnet allows the whole trim to slide out the top of the valve. Therefore in-situ maintenance is possible if required. Superheated steam continues to play a


pivotal role in electricity generation and other essential industries. Climate change and the need to use resources efficiently will no doubt bring new flow control challenges in the future, which means innovations such as the DSCV- SA will be essential.


Celeros Flow Technology celerosft.com


FLOW OPTIMIZATION SECOND TO NONE


EXCELLENCE – MADE TO LAST


THE NEW BLUELINE NOVA ROTARY LOBE PUMP


The BLUEline Nova sets new standards in pump technology. With or completely without casing protection – the BLUEline Nova achieves unrivaled volumetric efficiencies.


Made for one another – the newly developed DIUS rotors in combination with the flow- optimized pump chamber ensure perfectly smooth running at pressures of up to 12 bar.


NOVA BLUEline www.newblueline.com Börger UK Limited • East Wing • Old School • Watling St. Gailey • Staffordshire • +44 1902 798977 • uk@boerger.com • www.boerger.com 211014 ANZ UK NOVA 195 x135_RZ.indd 1 14.10.2021 08:45:27 OCTOBER 2023 | PROCESS & CONTROL 15


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