Data sheet ERHARD TWIN-AIR® air valves

ERHARD TWIN-AIR® AIR VALVES The valve for automatic air release and air admission of pipelines Thanks to its large cross-section and the very high ventilation speeds, the ERHARD TWIN-AIR air valve is ideal for use in larger pipe networks and guarantees safe pipe ventilation during the filling process, operational air release being in service and during the draining process. Notwithstanding the high performance, the construction is compact and space-saving. The ERHARD TWIN-AIR Air Valve has two nozzles. Air can first escape via both orifices in the pipe filling process which means high ventilation...

Brief specifications: • Body and body cover made of ductile cast iron EN-JS 1050 • Body inside enamelled and outside epoxy, or • Body inside and outside epoxy • Body cover: inside and outside EKB fusion bonded epoxy • Float ball for DN 50 to DN 100 made of multichamber GRP (optional of austenitic CrNi steel 1.4571) • Float ball for DN 150 and DN 200 made of austenitic CrNi steel (1.4571) • Float guide and float assembly for evacuation under pressure made of austenitic CrNi steel (1.4571) • Body seat made of EPDM, W270 • Connecting bolts made of stainless steel A4 Range of application • Automatic...

AIR OUTFLOW AND INFLOW CAPACITIES The suitable valve size is selected on the basis of the actual working conditions. Air capacity For air capacities, see diagrams on the right: 1. evacuation via the large orifice (filling the pipeline). The air flow rate Q Air is identical with the inflowing water rate. 2. evacuation via the small orifice (under working pressure). Air 3. admission via the large orifice (emtpying the pipeline). The air flow rate Air Q is identical with the outflowing water rate. Extreme air rate demand If one single air valve cannot comply with the specified outflow and inflow...

PERFECT ENGINEERING TO THE LAST DETAIL Air outflow (large orifice) recommended operating range Air evacuation under pressure (small orifice Ø 2.5 mm), PN 10 to PN 25 ERHARD TWIN-AIR® air valves

PERFECT ENGINEERING TO THE LAST DETAIL Air inflow (large orifice) recommended operating range ERHARD TWIN-AIR® air valves

TALIS is the undisputed Number One for water transport and water flow control. TALIS has the best solutions available in the fields of water and energy management as well as for industrial and communal applications. We have numerous products for comprehensive solutions for the whole water cycle – from hydrants, butterfly valves and knife gate valves through to needle valves. Our experience, innovative technology, global expertise and individual consultation processes form the basis for developing long-term solutions for the efficient treatment of the vitally important resource “water”. ERHARD...