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Ball valves are quarter-turn, straight-through valves that have a round closure element with matching rounded seats that permit uniform sealing stress. The valve gets its name from the ball that rotates to open and close the valve. Ball valves are used in situations where tight shut-off is required. They are wide duty valves, able to transfer gases, liquids and liquids with suspended solids (slurries).

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Posted: 2/14/17 in Electrical Engineering
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Equipment used in space must be tested to ensure that it will survive the rigors of manufacturing, transportation, temperature and humidity before it even reaches the launch pad. It must survive the stresses of launch, including acceleration, vibration, shock, EMI and temperature shock. It must also be tested to ensure survival in space including vacuum, extreme temperatures and solar ra...

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