Safety valve with friction means for damping valve vibration

Details Safety valve with friction means for damping valve vibration Safety valve with friction means for damping valve vibration

1982-09-27

1984-11-13

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

137542, 188 67, 188381, 251 64, F16K 1704

Patent

active

044819749

ABSTRACT:
A safety valve has movable and immovable valve elements, and a friction unit arranged therebetween for damping vibrations, wherein the friction unit has a plurality of friction members movable radially relative to a valve axis, a pressing member arranged to move the friction members so that their friction surfaces are pressed against a friction countersurface of a movable valve element of the movable valve means and for abutment against a stationary abutment member at their side facing toward a valve closing member, and a pretensioned auxiliary spring acting upon the friction members at their side facing away from the valve closing member and in a valve closing direction, wherein the auxiliary spring has such force and such a smaller resistance that in the event of seizing of the friction members with the movable valve element, the auxiliary spring is compressed within a predetermined opening pressure which does not considerably exceed a response pressure over approximately a valve stroke.

REFERENCES:
patent: 1608392 (1926-11-01), Hannah
patent: 2017297 (1935-10-01), Sorensen
patent: 3848632 (1974-11-01), Powell
patent: 4194527 (1980-03-01), Schonwald
patent: 4357956 (1982-11-01), Anselmann

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