78 HPM 0416

HPM-04-APR-2016

Got a story? Ring us on 01732 748041 or e-mail twood@unity-media.com PIPES,PUMPS,VALVES&FITTINGS An open and shut case for valves Building performance and system optimisation are recognised throughout our industry and rightly so if we are to achieve the 20% energy efficiency target for 2020. But what is a little less black and white is how. Sindar Singh, climate control manager at Pegler Yorkshire, offers his insight... We all know that building system optimisation benefits the full spectrum of those involved from design consultants, specifiers, contractors, through to facility users – but the key question is, how is it truly achieved? As a manufacturer of plumbing and heating systems and components for over 100 years, we are well placed to provide a myriad of product solutions that do a job and do it well. However, what our research suggests is that specifiers and contractors are adept at selecting these quality products but would like additional support in helping them achieve optimum system efficiency via more technical data, design commentary and information about where these products are best placed and why. Take valves for example, the market contains an array of valves from mini ball valves through to large size ductile flanged butterfly valves for hydronic and potable applications. However, “commercial valves” can be sighted within a different area of a building and used across a range of applications. VALVE SOLUTIONS Our approach is to provide valve solutions targeting ‘application areas’ this will ensure the right valve is chosen to support function, size, performance and optimisation, in essence, to help the building perform and help reduce energy costs. In addition, specifiers can rest assured that by choosing the correct valve it will have a positive effect on SAP Ratings and BREEAM assessments not to mention the reduction of costly maintenance bills all while it is increasing the reliability of a system. Pegler Yorkshire’s research has shown that specifiers are primarily interested in the application, hence the reason why Pegler Yorkshire’s valve range has now been categorised into three key areas, Source, which is focused around plant/boiler centres, Network, which encompasses the distribution of heating and potable building systems, and finally Zone, the occupied function zone, such as an apartment, office, or ward where the heat or water is emitted. We can safely say that requirements for the Source area would be centred on large sized valves, in some instances up to DN600, which provide regulating and isolating functions from the heat source into the first part of the network. Within the Network area valves are used to control water flow and balance the heat and cooling distribution to different locations. These WWW.HPMMAG.COM valves ensure the correct flow rate is supplied to differing parts of the building, therefore, providing optimum energy efficiency and comfort. The next point of use is classed as the Zone area, for example heating, this consists of pre-set valves for either panels or radiators through to modular valves units used on fan coil units, these types of valves allow control through heat/flow output, therefore, offering precise controlled comfort. THE RISE OF PICVS In order to achieve efficiency targets, energy cost savings and consistent user comfort the use of Dynamic valves in particular PICV (Pressure Independent Control Valves) is on the rise. The BSRIA 2014 Hydronic Controls Report suggests that over a three-year period from 2014 to 2017 the PICV area of the UK market was forecast to grow by 45%. WHY CHOOSE A PICV? A PICV replaces the conventional control valve and static balancing valve set and eradicates the time-consuming manual balancing procedure. It works by automatically balancing a system and preventing over or under supply of heating or cooling energy and ensures each terminal receives the specified design flow rate, therefore, improving the overall control accuracy. By providing this consistent supply there is minimal temperature differential which means there is no energy wasted and energy costs are controlled. One example of a PICV is the Ballorex Dynamic valve from Pegler Yorkshire. It is a combined pressure independent flow limiter and control valve which maintains a constant flow independently of pressure changes in heating or cooling systems. It boasts a leading flow accuracy of +/- 3%, more than 50% better than the nearest competitor, according to independent test specialist, BSRIA. Another key feature is the ability to verify the flow rate by the use of a built in measuring station, the venturi design increases the enquiry number 152 78 APRIL 2016 HEATING & PLUMBING MONTHLY measured signal, ensuring the significant pressure loss, common in other valve systems is recovered as it passes through. Energy is, therefore, not needlessly expanded in pressure recovery making the use of these valves highly energy efficient. However, these valves are just a part of the Dynamic family which includes Differential Pressure Control Valves, PIVs (flow limiting valves) and Modular Valve Systems. And, with end technology now being incorporated into valve design, installers will have much more choice and flexibility in their jointing method. ADDITIONAL SUPPORT What is paramount to achieving energy targets, SAP ratings, BREEAM status and even user comfort expectations is the understanding of valve technology and how these sometimes small, but extremely The use of a PICV helps to achieve efficiency targets and energy cost savings important components, are integral to a fully efficient HVAC system. That is why Pegler Yorkshire is continually developing solutions and innovating new products to keep specifiers and contractors at the forefront of their profession. We have a range of support tools, which includes drawing ‘Take-Off’ which utilises our century of experience and provides the correct pipe sizes and valves for optimum system performance which gives contractors the confidence in their installation. There is also a range of CIBSE-accredited CPD modules, including Commissioning Valves and a specific Dynamic PICV Balancing Valves presentation which gives an overview of the product, the terminology used and simple step by step to calculating flow and much more. Overall, a system utilising the correct valve in the correct area is a system that will ultimately benefit from greater performance and provide optimised building efficiency.


HPM-04-APR-2016
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