The combustion chamber in a rocket engine is a main critical part since this area creates the thrust needed to propel the rocket or spacecraft. In order to function properly, this chamber needs to endure extreme temperatures and pressures as well as intense vibrations.
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Weather Satellite Calibration Instrument
Category
Leakage Requirement
3 min
Description
There are a variety of satellites, each with a specific function and supporting a specific aspect of our daily life. It can be used to enhance navigation, GPS or internet communication; to monitor tides; or to forecast weather. In order to link with each function, a satellite carries instrumentation that needs to operate for many years since maintenance is not possible on a satellite. Instrumentation also needs to be protected from the outside atmosphere, all of which are possibly detrimental, as well as internal corrosive fluids and substances that are carried by the satellite for its other functions (such as hypergolic fuels that power its thrusters).
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Launch Vehicle Fuel / Oxidizer Poppet Valve
Category
Leakage Requirement
3 min
Description
In order to handle all the fluids used on a launch vehicle such as in the propulsion system, many different type of valves are installed that also require radial and dynamic seals. Some are poppet valves, which are unique due to the reciprocating movement of the shaft leaving the seal unsupported.
As a flow control device, the valve allows the flow of pressurized fluid (liquid or gas) in one direction only. In normal operations, they are in shut-off position where sealing is secured by static seals that are designed to withstand any blowout.
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