Vacuum valve

Definitions

  • Webster's Revised Unabridged Dictionary
    • Vacuum valve a safety valve opening inward to admit air to a vessel in which the pressure is less than that of the atmosphere, in order to prevent collapse.
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Usage

In literature:

What is a vacuum relief valve?
"The Traveling Engineers' Association" by Anonymous
He set up a vacuum-valve arrangement in the base of a large glass jar.
"The Pirates of Ersatz" by Murray Leinster
A valve by which the first vacuum necessary for starting a steam-engine is produced.
"The Sailor's Word-Book" by William Henry Smyth
Opening a valve turns on the suction or vacuum.
"Guide to Hotel Housekeeping" by Mary E. Palmer
C, Vacuum safety valve.
"The New Gresham Encyclopedia" by Various
When the valve was closed, the air could be exhausted from the tube in front of the piston, and a partial vacuum formed.
"The life of Isambard Kingdom Brunel, Civil Engineer" by Isambard Brunel
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In news:

Features single-foam pad attachment, welded steel lifting frame, integrated vacuum guard system with check valves, gauge, and air filter.
Nu-Con Equipment's compact 4-way Selector Valve diverts or converges the flow of pneumatically conveyed powders and pellets in dilute and dense phase pressure or vacuum systems.
The Air/ Vacuum Valve automatically exhausts large volumes of air from the system while it is being filled with the slurry.
Is there a color code for shutoff valves for compressed systems and for vacuum systems (i.e.
A recent comparative vacuum technology study at Daimler -Chrysler found that air consumption could be reduced by 98% by equipping a robot's end-of-arm tooling with a new multistage vacuum generator and check valve.
In the process of pipe -making, a set of vacuum valves pulls suction on the melted plastic into a form that makes the material into the shape of the corrugation molds.
The Premium Chip Vac System comes with a Chip Vac , lever lock drum lid, shutoff valve, filter bag, 10-foot (3-meter) flexible vacuum hose, aluminum tools, 20-foot (6.1-meter) air hose, drum dolly, tool holder and quick connects fittings.
These components include vacuum valves, valve pits and vacuum station equipment.
The valve is intended for for use with vacuum to pressure of 125 psi.
The X23-2000 is an automatic, easy-to-use and portable diagnostic tool that testing companies can employ to carry out compliance testing on pressure/vacuum vent valves .
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In science:

The three vacuum chambers are connected via two differential pumping stages, each consisting of a differential pumping tube as well as a gate valve.
An apparatus for immersing trapped ions into an ultracold gas of neutral atoms
The supersonic source uses 4 bar of Ar, Kr or Xe mixed with a small fraction of SF6 as the carrier gas. A solenoid valve releases this gas every 0.2 s in 100 µs pulses that expand through a nozzle into a vacuum of ∼ 5 × 10−5 mbar. A disk of Yb is positioned immediately outside the nozzle.
Slowing heavy, ground-state molecules using an alternating gradient decelerator
The typical experimental setup is illustrated in Fig. 1. A solenoid valve emits short pulses of the carrier gas , which is usually Ar, Kr or Xe, into a vacuum chamber maintained at pressures below 10−4 mbar.
Preparation and manipulation of molecules for fundamental physics tests
Central to the system is the valve panel providing interconnection among the target loop, hydrogen and helium source bottles, a vacuum pump and a 2500 liter ballast tank for hydrogen.
A High Power Hydrogen Target for Parity Violation Experiments
Figure 3-10: Cross-section through the pressure relief valve. A VCR fitting brazed into the base makes a superfluid tight vacuum connection to the superfluid jacket through 2 mm ID tubes.
Bose-Einstein Condensation of Atomic Hydrogen
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