The vacuum system used with rotary evaporators can be as simple as a water aspirator with a trap immersed in a cold bath ( for non-toxic solvents ), or as complex as a regulated mechanical vacuum pump with refrigerated trap.
32.
Water extinguishers can also be fitted with air aspirators when used with foam ( commonly used on AFFF and FFFP foam extinguishers ) which will result in a more expanded foam but will lack the durability or heat resistance of compressed air foam.
33.
The valve is used to mechanically meter out the gas at a rate of roughly 3-600 psi and 4 CFM . Typically there are two high pressure hoses attached to the valve, which are connected at the other end to aspirators.
34.
Before closing the tap, it is necessary to " break the vacuum " ( letting in the air in through any area in the apparatus, by removing the funnel for example ), otherwise water goes up the apparatus from the aspirator.
35.
In entomology, an "'aspirator "', also known as a "'pooter "'is a device used in the collection of insects, crustaceans or other small, fragile organisms, usually for scientific purposes.
36.
After being X-rayed to check for health and insect damage, cleaned gently with aspirators and velvet rollers and dried out for weeks in humidity-free air, they are put away in cool underground bunkers for rests that scientists plan to last for 200 years or more.
37.
While the air pressure is declining as the torpedo is running under the water, the pressure regulator feeds the constant high-pressure air to the engine intake aspirator and keeps the constant running speed in 43 knots ( or 80 km / h, 50 mile / h ).
38.
These include the Boeing 767, Boeing 757, and Airbus A320-series aircraft . Typically, overwing evacuation slides are not designed for use in ditching situations as they cannot be detached and will not operate, as the system is disabled by the aspirators on the slide taking in water, and Boeing recommends disarming the doors of a 747 before opening in a ditching situation.
39.
But as Linda and Emanuel develop a friendship, Emanuel tries to hide the fact that Linda's " baby " is really a doll from others by not letting people near the " baby . " But that task becomes increasingly harder when her best friend / co-worker Arthur from the medical supply store befriends Linda when she goes in to purchase a baby nasal aspirator, and agrees to substitute for Emanuel as the babysitter when Linda makes mention of being invited to Emanuel's birthday dinner and needing a substitute babysitter the night of the dinner.
40.
This basic concept is more correctly known as an aspirating skimmer, since some skimmer designs using an aspirator do not use a " Pin-Wheel " / " Adrian-Wheel " or " Needle-Wheel " . " Pin-Wheel " / " Adrian-Wheel " describes the look of an impeller that consists of a disk with pins mounted perpendicular ( 90?) to the disc and parallel to the rotor . " Needle-Wheel " describes the look of an impeller that consists of a series of pins projecting out perpendicular to the rotor from a central axis . " Mesh-Wheel " describes the look of an impeller that consists of a mesh material attached to a plate or central axis on the rotor.
