What is a water vacuum?
vacuum is measured in inches of mercury. sea level is zero. water will boil at 212F. as negative pressure or elevation increases the boiling temp. of water decreases. if you h…ad a pressure reading of 29.7 in" of mercury the water will boil at 192F. if you had a pressure reading of 10 in" of mercury water will boil at 32F
Water will 'boil' spontaneously in a vacuum
No, metal will not rust in vaccum water because the process of rusting requires the presence of oxygen and water.But in this case only water is present and since this water …contains no air(nor does it contain oxygen) rusting will not take place. Water in a vacuum will become a gas. Then the vacuum is not a vacuum unless 0 mmHg is re-obtained. Then, no... no rust because there are no reactants in the latter case.
0 degrees or there abouts
it will suck the water up, depends what type of vacuum, and it could electricuit u !!! (that gd enough)
In a vacuum, there is no atmospheric pressure to keep the water in the liquid state.
The same as it does in atmosphere. Do you mean in zero-gravity perhaps?
You can vacuum a salt water pool the same way you would a non salt water pool. If you are vacuuming on the filter setting, your filter will help to clean the debris out of the… pool. If you are dealing with a very dirty pool and use the waste setting, you will be wasting some of the water from the pool in the process. Depending on how much water you take out and need to refill, you will most likely need to add some salt back in to get your salt level back to normal operating levels.
Depending on what you mean: . If water is exposed to a vacuum (no air, not a cleaning mechanism) the water tries to evaporate. or turn to vapor. This sucks heat from the li…quid and it cools off. ....any liquid has a specific boiling point. Dont confuse boiling with adding heat OK? So typically water at normal pressure boils at 212F. Well when we subject that water to a vacuum and lower the pressure, then it boils at a lower pressure and temperature. You can interchange the terms evaporate and boil here. Now the cooling part. In a lower pressure and during evaporation we see a change of stae from liquid to vapor; that is the important part as a very large quantity of energy is consumed during change of state. That energy comes from the surrounding water. . If water is placed in a vacuum flask (a Thermos bottle) it stays cold (or hot) since heat cannot cross the vacuum in the walls of the bottle. . If water is sucked into a vacuum cleaner the metal wand and hose will get cold as the air passin over the wet walls of the hos evaporates the water. The heat to do this is preferentially sucked from the walls of the machine.
Yes This is because boiling is caused by the liquid water turning to gas which is not influenced directly by other materials. However, once in a vacuum the pressure is so lo…w that the water will boil at much lower temperatures.
Indeed it does. If you subjected a wet substance to a vacuum pump, the water would evaporate, and as the hotter molecules escape first. The substance gets colder and colder… as the vacuum pressure decreases, eventually becoming an ice form from which it continues to sublimate.
You burn up the motor.
i believe the question should be stated as "How high can a pump pull liquid when mounted above the liquid source". an old pump adage is that a pump doesn't suck. sounds dumb, …but it refers to the necessity of having a positive pressure at the suction of the pump greater than the required net positive pressure req'd by the pump. NPSHa must be greater than NPSHr. in any system open to atmosphere the surface of the fluid will have 14.7psi (at sea level) X 2.31 ft/psi, or roughly 34' of head, or NPSHa, available. the manufacturers performance curves will show the NPSHr of the pump at any given flow for a given impeller trim. by subtracting this NPSHr from the calculated surface pressure you can arrive at a general maximum lift that the pump can run at. there will also be line friction losses that will reduce this height, and typically we subtract another 2-3' for a fudge factor as you would not want to run on the ragged edge. so, a pump with an NPSHr of 8' would be able to lift cold water approx 22' before cavitating. getting it primed is another issue, and having said all this, there is a type of centrifugal that can successfully trick this seemingly rigid restriction on lift. the typical home commercial jet pump can lift from many times this limited depth by taking a portion of the high pressure discharge and sending it down a separate pipe and into the suction pipe. this effectively increases the suction pressure and allows this type of pump to lift from quite a depth. a really neat way around having to install a down-hole pump submersible. of course the type of pump, what you are pumping, temperature, vapor pressure, specific gravity, and viscosity will all affect the height that a pump can lift a fluid. If the question is ' at what height we can place the suction side of pump from the water level from where it is pulled up', then if we are not considering the NPSH (which is not practical of course) , then i think that the maximum height of the suction side will be the height which will balance the pressure which is on the water level below from where it is pumped. If the pressure there is atmospheric pressure (at the water level below suction side)then maximum height of water rising is 10.3 m around(will vary according to the fluid being pumped). Above it water will not rise whatever vacuum you create though pump.(Its just like in barometer where mercury doesn't rise above 760mm, although there is vacuum above it in the tube. This is because at base of inverted tube of barometer, pressure is balanced). In practical of course the height is much less of course otherwise cavitation will take place when pressure falls below Vapor pressure of the Liquid being pumped.
YES Machines designed to work with water have valves to prevent damage to the motor. -------------------------------------------------------------------------------------…-------------- In short, Yes. A standard upright vacuum cleaner you'd find in most homes can not tolerate moisture. Shop Vacs on the other hand can suck up water but again the motor can NOT get wet. Shop Vacs employ a pretty simple device to ensure the motor never sucks water up. On the suction end of the vacuum there is a cage that is fully surrounding a float. The float is too heavy to be sucked up when there is nothing pushing it up. but as the water rises in the tank the float gets higher and higher to the suction port until it gets close enough for the port to grab it, effectively stopping the vacuum from sucking anything else. Same as covering the hose with your hand you will hear the motor pick up speed as there is no wind resistance on the fan anymore. Just dump the water out and keep right on a sucking.
Roughly 16 inches before the surface starts to boil from the vacuum, this is also assuming 33 degree water, the higher the water temp the less lift will be achieved due to wat…er's vapor pressure.
A common way for water to get into a vacuum cleaner is for it to besucked up off the floor. We also see that some machines withwashable filters have those filters put back in …wet. The filtersare supposed to be completely dry before reinstalling them. Manyvacuums can be damaged by water.