Good vacum pump systems can be found online. Check out www.vacuumpumpsystems.com.
Some of the leading vacuum pump manufacturers in India include: Toshniwal Instruments (Known for rotary vane and dry vacuum pumps) Avlok (Specializes in industrial and high-vacuum pumps) PPI Pumps (Manufacturer of liquid ring vacuum pumps) Woosung Vacuum Company India (Offers oil-sealed and dry vacuum pumps) Promivac Engineers (Deals in high-performance vacuum systems)
There is no vacuum pump on gasoline engines, only some diesel engines. Vacuum for vacuum controls is generated at the intake manifold. If the engine is getting old and weak, the vacuum starts to decrease and some of the vacuum controls will stop working.
Ross Cook seems to have a very good feed back rating for their industrial vacuum systems. You can also find some local businesses that carry them by check the yellow pages.
Cyclonic and filtered are the two main central vacuum systems. Filtered systems use filters to clean the air that the vacuum takes in, while cyclonic systems uses centrifugal force and gravity to separate the dirt from the air and deposits it into a canister.
If the vacuum pump is on, the water will continue to boil. If the vacuum pump is off as the vessel is sealed, the boiling will stop at a point of equilibrium.
Some vacuum pumps can produce useable pressure at the exhaust port but most are not fitted to connect a hose to the exhaust. The Cole-Palmer EW-79202-00 Air Admiral® diaphragm vacuum/pressure pump is one such pump that can be used to produce a vacuum or pressure.
A Robinair vacuum pump can be purchased from the HVACStore website, as well as from Orion Air. They are also advertised on eBay and Amazon for purchase.
Some systems use engine vacuum to move the control doors. You could have a vacuum leak.
First you need a vacuum pump with proper vacuum hoses; then you need some container which you can seal air tight, hook the vacuum hoses to, and it must be strong and rigged as to not collapse when a vacuum is pulled. Container will preferrablely have place to look into it for expierment, or be made of glass. Now turn vacuum pump on for an hour or so and you will have an ok vacuum/empty space.
Some systems require the engine be at low power to shift, the easy way to ensure this is to use a vacuum switch Also some cases use vacuum to actually shift into 4WD
A vacuum pump inside an engine typically consists of a rotor and a housing that creates a low-pressure area as the rotor spins. The rotor's motion draws air out of the engine's crankcase or other areas, creating a vacuum that assists in various functions, such as improving fuel atomization and enhancing the efficiency of the engine's air intake system. In some engines, the vacuum pump is driven by the engine's timing belt or chain, while others may use an electric vacuum pump.
Some examples of large scale laboratory operations are oil-sealed vacuum pumps and systems and dry compressing vacuum pumps and systems. These are mainly used in research procedures and simulation of space conditions.