Liquid line thermal barrier

Details Liquid line thermal barrier Liquid line thermal barrier

1980-07-21

1982-12-21

Cohan, Alan

Fluid handling

Line condition change responsive valves

Direct response valves

F16K 4900

Patent

active

043644112

ABSTRACT:
Heat conduction along and through the line of a nonambient temperature liquid system is deterred by a thermal barrier having insulative stop and seat components interengaged for thermally isolating the liquid on one side of the barrier from the liquid on the other side of the barrier when the liquid within the line is stagnant. The barrier automatically opens to permit liquid flow through the line and closes to thermally isolate the liquid when the flow is interrupted, i.e. the liquid flow within the line is substantially unimpeded by the thermal barrier. For an application in which the line is subjected to low temperature which could freeze trapped liquid, such as in the outlet line of a water heater located in an uninsulated space, a small bypass passage is provided which is open when the barrier stop is closed so that a limited amount of heat is conducted past the barrier to deter freezing of the water.

REFERENCES:
patent: 3190284 (1965-06-01), Koepf
patent: 3412756 (1968-11-01), Shore
patent: 3438391 (1969-04-01), Yocum
patent: 3550902 (1970-12-01), Pidgeon et al.
patent: 3756273 (1973-09-01), Hengesbach
patent: 3920042 (1975-11-01), Blatt
patent: 3943969 (1976-03-01), Rubin et al.
patent: 4149560 (1979-04-01), Berg

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