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==Low flow devices==
==Low flow devices==
Vortex valves have a unique head/discharge relationship. Flow is directed tangentially into the volute to form a vortex that reduces the design peak discharge flow rate from the Vortex Valve far below an equivalent diameter simple orifice.
*Under low flow conditions, water passes through the valve with negligible pressure drop.
* Under high flow conditions, a vortex flow pattern develops within the device creating an air filled core. This phenomenon restricts and throttles flow through the device, creating a back pressure in the device immediately upstream of its discharge. During high flow rates, a vortex valve with a relatively large outlet opening performs similarly to a conventional orifice with a much smaller outlet opening; however, debris that might clog a smaller orifice is able to pass through the Vortex Valve because of the relatively larger flow path opening.
==Proprietary links==
==Proprietary links==