Ball check valve

Details Ball check valve Ball check valve

1976-04-23

1978-01-24

Engle, Samuel W.

Valves and valve actuation

Rotary valves

Ball valve

251 82, 13753311, G21C 1708, F16K 1508

Patent

active

040702391

ABSTRACT:
A pressurized nuclear reactor having an instrument assembly sheathed in a metallic tube which is extended vertically upward into the reactor core by traversing a metallic guide tube which is welded to the wall of the vessel. Sensors in each instrument assembly are connected to instruments outside the vessel to manifest the conditions within the core. Each instrument assembly probe is moved into position within a metallic guide channel. The guide channel penetrates the wall of the vessel and forms part of the barrier to the environment within the pressure vessel. Each channel includes a ball check valve which is opened by the instrument assembly probe when the probe passes through the valve. A ball valve element is moved from its seat by the probe to a position lateral of the bore of the channel and is guided to its seat along a sloped path within the valve body when the probe is removed.

REFERENCES:
patent: 2569316 (1951-09-01), Jerman
patent: 3769156 (1973-10-01), Brecy
patent: 3840432 (1974-10-01), Malaval
patent: 3844884 (1974-10-01), Frank et al.
patent: 3893651 (1975-07-01), Uecker

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