083 HPM 1012

HPM October 2012

PIPES, PUMPS VALVES & FITTINGS DURAPIPE ON WHY PLASTIC IS A COST EFFECTIVE ALTERNATIVE TO METAL, DANFOSS LOOKS AT THE DEVELOPMENT OF TRVS AND DRAYTON EXPLAINS HOW TO SAY GOODBYE TO FROZEN PIPES Midi-Break from Arrow Valves offers the protection A wall-mounted Break Tank offering Fluid Category five protection has been developed by Arrow Valves to provide point of use backflow protection and boost pressure. The stainless steel cabinet provides a neat and compact installation, making it ideal for kitchens and bathrooms where aesthetics and hygiene are critical. Applications requiring Fluid Category five protection include: • Waste bin washing – single tap • Non-domestic hose union taps • Healthcare (baths with shower hoses, clothes and dish washing machines) • Bidet washing enquiry number 168 Remote commissioning • Sinks with hoses • Vegetable washing Marflow Hydronics has witnessed a growing Midi-Break operates automatically and is available with three pump duties – Midi-1 for a basic interest in its Pressure Independent Characterised shower, Midi-2A for more pressure and Midi-3A for high flow and pressure. Control (PICC) valves as awareness of its Remote™ Commissioning concept increases. Remote™ Commissioning is a system solution Pipework saves on installation time offering all that is required to balance and enquiry number 169 control water flow to hydronic terminal units in REHAU provided RAUTHERMEX pipework at the new HMP and Young a flexible and environmentally friendly way. Offender Institution Grampian project in Peterhead, Scotland for design By coupling pressure independent control and build contractor Skanska. valves with a BACnet controller running a Installing the external mains throughout the site prior to the custom strategy, the remote concept takes construction of the main buildings and keeping in line with the commissioning out of the ceiling space and into contract programme were some of the challenges faced on-site. the commissioning engineer’s laptop. Skanska required a solution that achieved the installation dates Designed with the customer in mind, the without compromising the specification of the pipework. concept aims to reduce time, costs and energy for The original specification in steel pipe for the district heating system all users. It is a future proofed solution, required the provision of stress analysis and the insertion of loops to according to Marflow Hydronics that allows allow for linear expansion of the pipework. This would have involved commissioning to be completed anywhere in the large quantities of trenching being left open at any one time waiting for world and at anytime needed from a computer. non destructive testing (NDT) of the pipework joints. This system is just one of the benefits from The polymer solution in the RAUTHERMEX pipework eliminated both of these issues because it did Marflow Hydronics’ range of PICC valves, with not require an allowance for linear expansion, leak detection or NDT testing. The pipework achieves customers having the option of axial, rotary or longitudinal stability which means the pipe does not expand or contract due to temperature electronic valves. fluctuations while in operation. It features a water-tight insulating layer made from polyurethane enquiry number 167 which achieves Lambda values of just 0.0216 W/mK and it has a corrugated LLD-PE outer jacket. HEATING & PLUMBING MONTHLY OCTOBER 2012 83


HPM October 2012
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