Egg (chair) at San Francisco International Airport features the Egg in its boarding area. Now there are hundreds of different types of egg chairs and hanging egg chairs inspired by Arne Jacobsen's design. The Hanging Egg Chair was designed by Danish furniture designers Nanna Ditzel and her husband Jørgen Ditzel in 1957 in Denmark and launched in 1959 in cooperation with the wicker company R. Wengler in Copenhagen. Since 2012 it is distributed by Sika Design.. The egg-shaped basket seat is made of woven natural rattan and suspended by a metal chain from above. Nanna Ditzel incorporated the minimalist visual elements that
Ball valve operation, this will cause the ball to float downstream slightly. This causes the seating mechanism to compress under the ball pressing against it. Furthermore, in some types, in the event of some force causing the seat mechanism to dissipate (such as extreme heat from fire outside the valve), the ball will float all the way to metal body which is designed to seal against the ball providing a somewhat failsafe design. Manually operated ball valves can be closed quickly and thus there is a danger of water hammer. Some ball valves are equipped with an actuator that may be pneumatically,