Traditional ‘cone and seat’ type valves need to be fitted on the flow rather than the return side of the radiator to prevent hammer when a partially open valve is forced to slam shut by water flowing the wrong way through the valve - resulting in a costly call back for the heating engineer. Danfoss’s ‘flow selectable’ bi-directional TRV can be installed horizontally or vertically, in flow or return. If any noise occurs after fitting it can be stopped by simply ‘revolving’ the patented flow direction selector on the valve head from the factory-set position to the alternative setting. This quick and easy adjustment changes the direction of water flow around the cone, ensuring hammer-free flow in the appropriate direction without a time-consuming drain down, use of special tools, or loss of profit or business reputation.
Danfoss’s TRV provides an innovative solution to the age-old problem of water hammer for domestic heating installers and their customers, says the company’s Marketing Director, Bjorn Sejr Nielsen. He explains: “Hammering is rather like trying to hold a bath plug fractionally open as bath water flows out - the flow slams the plug closed again and again. If water flows the wrong way through a partially open TRV it will slam shut in the same way. With this new solution simply fit the ‘flow selectable’ bi-directional TRV and listen; if it hammers ‘revolve’ the barrel to reverse the flow direction and the problem’s solved. Simple!”
Danfoss’s ‘flow selectable’ bi-directional TRV is a real-time saver, particularly in large domestic heating installations, where resolving problems with TRVs that had been installed the wrong way round could be a time-consuming task. Bjorn Nielsen says: “This TRV may carry a small premium but soon pays for itself in savings on call backs, contract delays and downtime.”
Featuring a new generation bi-directional valve body, this TRV is designed by Danfoss to deliver improved performance in whatever direction it is fitted. It utilises high performance liquid actuators and is CEN approved for maximum customer confidence and reliability in use. The ‘flow selectable’ bi-directional TRV is available from all leading stockists of Danfoss domestic heating controls and can be supplied in convenient TRV Combi Packs or in Radiator Packs, complete with matching lockshield valve.
Danfoss is a leading manufacturer of world-class heating controls, from programmers and thermostats to TRVs and motorised control valves, with factories in the UK and Denmark. The company’s extensive product range is supplied through a national network of stockists. As part of its commitment to improving the knowledge and profitability of its customers, Danfoss offers a programme of installer training courses and CPD seminars, covering all aspects of domestic central heating techniques.