The new ASAST series of 316 stainless steel valves from Alcon is designed for water, steam and corrosive fluid applications. By directing the flow of fluids and gases under the valve seat, the angled body design promotes higher flow rates while eliminating traditional problems associated with water hammer. Inert to all but a few obscure substances, PTFE (Teflon) is used in the main seal to maintain performance across a wide range of temperatures, allowing the valves to reliably control fluids and gases from -200C to +180C. Remote control is achieved via 13mm BS21 or NPT port connections for single spring return or double acting compressed air piloting arrangements. Alternatively the valve bodies are designed for the attachment of Alcon 31 Series solenoid pilot valves for electronic operation. Control inputs can come from 12v, 24v, 48v, 110v DC sources or 24v, 110v, 120v, 220v, 230v, 50/60HZ AC supplies. The valves cater for pipe sizes from 13mm to 50mm and are available with NPT, BSP, Butt or Socket Weld fitting arrangements, high flow rates of up to 52.8Kv are possible using the 50mm unit.