Abstract: A modified vacuum actuated valve assembly and sealing mechanism is provided for improved sub-atmospheric flow stability characterized by the absence of delivery pressure spikes and flow excursions. The valve assembly includes a non-stationary thermoplastic seat and a stabber. The stabber is characterized by a top portion having a circular periphery designed to mechanically engage and disengage with an inner sealing surface of the thermoplastic seat. The sealing surface is coined to eliminate surface irregularities contained therein, thereby producing a relatively smooth coined mating inner sealing surface for the circular top portion of the stabber. The valve assembly also includes a modified bellows capable of fine tuning the delivery pressure of the valve assembly.

Abstract: A heat exchanger has an upper region, a lower region disposed vertically lower than the upper region, and a passive charge management device. The passive charge management device has an internal volume, an upper tube connecting the internal volume to at least one of the upper region and the lower region at a first vertical height, and a lower tube connecting the internal volume to at least one of the upper region and the lower region at a second vertical height that is vertically lower than the first vertical height.

Abstract: A control system for industrial water systems that utilizes multiple measurements of information and models to decide optimal control actions to maximize corrosion/scaling/fouling inhibition and particulate dispersancy performance and minimize cost of water and treatment chemicals. This system is capable of automatic operation for a wide range of process conditions, ensures multiple performance objectives, achieves robust operation under a variety or un-measurable disturbances and achieves the least costly solution delivery.