Relief Valves

The original finding aid described this as: Description: View of the Positive Pressure Relief Valve (PPRV) on the hatch of the European Laboratory/Columbus module, as documented by a crewmember during Expediti More

The original finding aid described this as: Description: View of the Positive Pressure Relief Valve (PPRV) on the hatch of the European Laboratory/Columbus module, as documented by a crewmember during Expediti More

The original finding aid described this as: Description: View of two Intermodule Ventilation (IMV) valves and two Positive Pressure Relieve Relief Valves (PPRVs) stowed in the Node 1 / Unity valve stowage loca More

The original finding aid described this as: Description: View of the Positive Pressure Relief Valve (PPRV) Cap on the nadir hatch, taken during Expedition 22 / STS-130 Node 3 / Tranquility outfitting operation More

The original finding aid described this as: Description: View of the Positive Pressure Relief Valve (PPRV) Cap on the nadir hatch, taken during Expedition 22 / STS-130 Node 3 / Tranquility outfitting operation More

The original finding aid described this as: Description: Blurred view of the Positive Pressure Relief Valve (PPRV) Cap on the nadir hatch, taken during Expedition 22 / STS-130 Node 3 / Tranquility outfitting o More

The original finding aid described this as: Description: View of the Positive Pressure Relief Valve (PPRV) Cap on the nadir hatch, taken during Expedition 22 / STS-130 Node 3 / Tranquility outfitting operation More

The original finding aid described this as: Description: View of an Intermodule Ventilation (IMV) valves and two Positive Pressure Relieve Relief Valves (PPRVs) stowed in the Node 1 / Unity valve stowage locat More

The original finding aid described this as: Description: View of the Positive Pressure Relief Valve (PPRV) Cap on the nadir hatch, taken during Expedition 22 / STS-130 Node 3 / Tranquility outfitting operation More

Deutsch: Zeppelin L2 (LZ 18) grät in Brand und verbrennt auf dem Flughafen Johannisthal in Berlin, 1913. English: 17 October 1913: On the morning of a scheduled test flight at Johannisthal, an airfield south More

Diagram of a typical Boiling water reactor (BWR) Mark I Concrete Containment with Steel Torus, as used in the BWR/1, BWR/2, BWR/3 and some BWR/4 model reactors. Français : Diagrame/coupe d'un réacteur à eau b More