What's the purpose of a solenoid valve?

Question

What's the purpose of a solenoid valve?

Answer 1

solenoid valves are like light switches, except for water or air.  Controls the flow of it.

Answer 2

this valve is a electro mechanical device to control the rate of flow(air,water,chemicals).

Answer 3

A solenoid is an electromechanical actuator. Usually it consists of a coil of wire and a ferrous metal core which is free to move in the centre of it. When current flows in the coil, the core is pulled into the coil by the magnetic field, so you get a linear movement - a push or pull.

A valve, as you know, is just something that controls the flow of a liquid or gas.

So a solenoid valve is a combination of a solenoid and a valve, which allows us to control the flow of gas or liquid using electric current.

Answer 4

It is a valve which is operated by a solenoid  (electromagnet).  Its purpose is to control the flow of a fluid electrically.

As well as being very common in industrial machinery  (much of which is powered by compressed air, but controlled by electronics)  you may well find solenoid valves in home appliances.  There is one in a dishwasher and two in most washing machines  (one each in the hot and cold supplies).  On expensive machines, the solenoid valves are fitted at the "tap" end of the hoses, so there is no water in the hoses when the machine is idle).  Solenoid valves are also used in gas boilers, to control the flow of gas to the burner.  A heating appliance with a flame-failure detector uses a special high-sensitivity solenoid valve, which is operated by the tiny current generated by a thermocouple in the flame but can also be operated manually  (via the priming button)  to allow the burner to be lit in the first place.

Answer 5

A solonoid valve is used to switch compressed air.

The air may be used in various ways eg. to charge a cyclinder to get linear movement, to clamp product, an air knife to dry product or a venturi to create a local vacuum.

They are normally low DC voltage and controlled by switch gear but can also be used stand alone in small projects where you migt want an electrical signal to actuate a pneumatic system eg. manual switch, an optical sensor or limit switch that detect product entering a manufacturing cell.

Answer 6

this will be helpful

http://en.wikipedia.org/wiki/Solenoid_va...