Small-capacity expansion valve

Details Small-capacity expansion valve Small-capacity expansion valve

1991-12-05

1993-02-16

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137510, 236 92B, 251 75, F16K 31126

Patent

active

051862077

ABSTRACT:
The expansion valve has an operating pressure setting member that can adjust the operating pressure of a pressure-activated diaphragm by moving a spring retainer of an operating spring against the force the spring which is interposed between the diaphragm and the spring retainer. The operating pressure setting member, after being set at a desired setting position, is securely fitted into and crimped by a secondary coolant flow pipe. The operating pressure setting member has a coolant passage for the coolant to pass through. This construction can completely prevent leakage of the coolant from the operating pressure setting member as would occur with conventional expansion valves whose operating pressure setting member is not installed inside the secondary coolant flow pipe.

REFERENCES:
patent: 2452441 (1948-10-01), Dube
patent: 2506413 (1950-05-01), Dube
patent: 2533600 (1950-12-01), Matteson
patent: 2548324 (1951-04-01), Smith
patent: 3388864 (1968-06-01), Noakes
patent: 4632305 (1986-12-01), Fujiwara
patent: 4678007 (1987-07-01), Ransom et al.
patent: 4959973 (1990-10-01), Tanaka et al.

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