Ammonia excess flow valve

Details Ammonia excess flow valve Ammonia excess flow valve

1998-11-23

2000-09-26

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

137462, 1375122, 137517, 137613, F16K 1730

Patent

active

061231002

ABSTRACT:
An ammonia excess flow valve has a seal ring (24) slidably positioned around at least two retainer vertical members (22B). A disk (26) has a disk central opening (26A) and a disk pin opening (26B) therethrough. The disk (26) is positioned adjacent to and below a retainer (22). A conduit (28) sealably connected to the disk (26) over the disk pin opening (26B) extends upwardly therefrom. The conduit (28) functions to permit the ammonia excess flow valve (10) to be reset by equalizing pressures on both sides of the disk (26) once excess flow that trips the ammonia excess flow valve (10) is remedied, minimizing creation of vapor.

REFERENCES:
patent: 3379213 (1968-04-01), Billington
patent: 3540469 (1970-11-01), Ward
patent: 3683957 (1972-08-01), Sands

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