open hood
locate the egr valve
next to it is a row of 4 solenoids. the second from the right is vent, the fourth is vacuum
they clip on, but you will probably break them the first time you remove them. then, you will see how they attach.
Solenoid valves are electromechanically operated valves which are controlled by an electric current, mostly used in fluidics. There are different types of solenoid valves, one or two port valves.
This URL has downloadable PDF files on solenoid valves - http://www.pdfone.com/keyword/explosion-proof-solenoid-valves.html
One can find information about plastic solenoid valves from a variety of places. Norgren, Reef Central, Danfoss, and GlobalSpec provide information about plastic solenoid valves.
Some times on/off valves are to large to be actuated using one solenoid valve,but most of the on/off valves are being actuated using only one solenoid valve
If you have more than one skimmer, close the valves for the ones you aren't hooking the vacuum to.
Solenoid valves are used to stop, close, mix or distribute liquids. They are usually made from brass or aluminum and used in sprinklers, dishwashers or washing machines.
A direct acting solenoid valve is one in which the action of the solenoid alone switches the valve gate. Most solenoid valves are "piloted", which means that a relatively small solenoid valve is used to allow pressurized air to actuate the valve gate mechanism. Because the solenoid does all of the work in a direct acting valve, the solenoid must therefore be larger than that of a piloted valve in order to generate the switching force. Piloted solenoid valves have the advantage of being more compact and consuming less current than a direct acting solenoid valve. Direct acting solenoid valves are useful when switching low pressure fluids.
Solenoid valves, magnetic contactors, motors.
2.5L V-6 Mazda Millenia engine is a non-interference engine. If your timing belt pops, you will not damage your valves, like I did in my Diamante
Pressure and Vacuum
This is good enough, if you want to purchase general solenoid valves like 2 way, 3 way , 4 way solenoid valves but for generic products you can also serch the manufecturer site as http://www.valve-store.com is a distributer.
"Valve" is the British word for Vacuum Tube, so for the British (which the person asking this question probably is) transistors did replace valves. Therefore the answer remains that values(vacuum tubes) where large and bulky, in addition they require high levels of power to function and created substantial heat and were quite fragile. The creation of the Transistor and then micro chip allowed for portability, lower levels of operation power to be required and reduced costs due to mass production