Abstract: An improved shell-and-tube steam instantaneous heat exchange system of a closely coupled feedback design which overheats water in the heat exchanger portion of the system and then blends the water, as needed, with proportional amounts of cold water to achieve the correct outlet temperature for a wide range of flow rates. The system uses at least two primary heat exchangers to provide redundancy in the case of failure of a major component of the system. Steam flow through the heat exchangers is controlled by the use of steam traps, rather than using a thermostatically controlled valve to vary the supply of steam. To obtain precise temperature control during varying water volume use, water is directed from the blended outlet of a first water tempering valve into the hot inlet port of a second water tempering valve.

Abstract: An improved shell-and-tube steam instantaneous heat exchange system of a closely coupled feedback design which overheats water in the heat exchanger portion of the system and then blends the water, as needed, with proportional amounts of cold water to achieve the correct outlet temperature for a wide range of flow rates. The system uses at least two primary heat exchangers to provide redundancy in the case of failure of a major component of the system. Steam flow through the heat exchangers is controlled by the use of steam traps, rather than using a thermostatically controlled valve to vary the supply of steam. To obtain precise temperature control during varying water volume use, water is directed from the blended outlet of a first water tempering valve into the hot inlet port of a second water tempering valve.

Abstract: An emergency tempered water blending apparatus is described which has a threeway, thermostatic mixing valve for mixing a cold water intake stream with a hot water intake stream at effective proportions to form a tempered water output stream having a desired, preset temperature. When the flow of the cold water is detected, a normally-closed valve in the tempered water stream opens allowing flow to the user. Water flow defaults to cold water upon either a mechanical or electrical failure, or upon the temperature of the tempered water becoming too hot to reduce probability of failure in hot mode.

Abstract: Disclosed is an a mobile emergency eyewash and bodysplash apparatus for delivering water for cleaning chemical irritants from eyes or skin. The apparatus includes a water tank housing which holds a water tank. A second housing contains a drench nozzle and eyewash fountain, both of which are connected by tubing to the water tank. The second housing is slidably and rotatably mounted on top of the water tank housing. The apparatus generally is positioned in the back of a pickup truck, so that during operation, the drench nozzle and eyewash fountain housing is slidably moved from the top of the water tank housing and rotated into place on the side of the truck. A panel on the second housing is opened to reveal the drench nozzle and eyewash fountain.