Module isolation devices

摘要

A gas flow isolation device includes a gas flow isolation valve (40) movable from an opened condition to a closed condition by movement of a valve stem (44) in response to the rupture of a rupture disk (44) in flow communication on one side (50) with a gas flow through the device and on the other side (54) with a chamber (56). The rupture disk ruptures when a predetermined pressure differential occurs across it. The valve stem can rest on or is otherwise mechanically linked to the rupture disk or is supported by a crushable member (404) that is compressed by the gas flow passing through the valve upon rupturing of the rupture disk.