To control the flow of cryogenic propellants such as liquid oxygen, liquid hydrogen or liquid methane on launch vehicles, cryogenic valves are used within these rockets.
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Launch Vehicle Combustion Chamber
Category
Leakage Requirement
2 min
Description
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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Sealed Carbon Dioxide (CO₂) Laser Systems
Category
Leakage Requirement
4 min
Description
Lasers are used in industrial production with high success. Some of the advancements in processing industry would not be possible without lasers. Carbon dioxide (CO2) lasers are among the oldest gas-based lasers. The long lasting legacy of carbon dioxide (CO2) has ensured that their costs remain extremely attractive compared to competing lasers. These lasers continue to command market share on account of their high, continuous power wave operations. They are known for their superior power conversion efficiency, and values in the range of 30% have been recorded. This makes them suitable for sensitive applications such as medicine, as well as demanding applications such as industrial cutting and welding.
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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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Helicopter Main Gearbox
Category
Leakage Requirement
3 min
Description
How would a helicopter main gearbox (MGB) successfully function without the proper sealing solution? Rotary lip seals are widely used to seal the oil lubricant within the gearbox and protect it from leaking out at where the shaft enters and exits the gearbox. The main gearbox, also known as a transmission, is a critical part in a helicopter’s airworthiness and safety because it is responsible for reducing high input speed generated from engines and providing appropriate torque to main rotors and other accessory systems.
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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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