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Maintains continuous flow at any position, irrespective of inlet pressure changes.
Sizes ½" up to 6"
The Auto Touch Independent (ATi) valve and the Auto Touch Independent Max(ATiMX) valve, which brings
pressure independent control technology to valves up to 6" and flow rates up to 469 GPM, are state-of-the-art
control valves combining a high quality/high rangeability temperature control valve with a dynamically
balanced flow regulator in the same space-saving housing. The result is a pressure independent control valve
that maintains the desired flow rate irrespective of the pressure differential across the valve
(Within rated differential pressure range of 5.8 to 60 PSI).
Even the most controllable standard (pressure dependent) temperature control valve will allow a
change in flow as the differential pressure in the system changes, which is an everyday occurrence.
Any time a chilled water or hot water system is operating at less than design maximum load
conditions – which is most of the time – differential pressures in the system tend to increase,
resulting in overflow through the control valves. This overflow condition results in control instability,
and higher pumping costs.
Balancing valves, either manual or automatic, can only prevent overflow at conditions above design
maximum flow. At any flow condition less than design maximum, balancing valves do not fulfill any purpose.
The ATi (ATiMX) valve provides a cost effective means of controlling hot water and chilled water
flow in an accurate and stable manner while minimizing pumping, heating and cooling costs. And by
combining the automatic temperature control function and the dynamic balancing function in a single
device, installation costs are also be reduced.
ATi valves are also available with an optional strainer/drain with isolation valve to provide a
complete and convenient solution for controlling and maintaining the coil.
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