He and Groupe Finot, the boat's French design team, are trying to figure out a simple way to open a gate valve if the boat capsizes so that water would rush in one side and flip it upright again.
42.
On all of the reasonably modern Turbo and Super-charged cars I've owned, the air injection system has gate valves that turn off when you take your foot off the gas-so the pump is essentially turned off when you're engine-braking.
43.
The repair work, on two 48-inch gate valves, would require the city to shut down the waste water pumping station, which sends about 140 million gallons of sewage a day across the East River to a treatment plant near Newton Creek in Brooklyn.
44.
For high pressure domestic water systems this does not matter, but for low pressure systems where flow rate is important, such as a shower fed by a storage tank, a " stop tap " or, in engineering terms, a " gate valve " is preferred.
45.
As such for higher voltage TEMs a third vacuum system may operate, with the gun isolated from the main chamber either by gate valves or a differential pumping aperture a small hole that prevents the diffusion of gas molecules into the higher vacuum gun area faster than they can be pumped out.
