What are the two types of solenoid valves?

What are the two types of solenoid valves?

There are many different types of solenoid valves available, though direct-acting and pilot-operated valves are the two main categories. When selecting a solenoid valve, it is important answer questions about the application and ensure that you are choosing a suitable valve.

What are the two main parts of a solenoid?

A solenoid valve consists of two main components: a solenoid and a valve body (G). Figure 2 shows the components. A solenoid has an electromagnetically inductive coil (A) around an iron core at the center called the plunger (E). At rest, it can be normally open (NO) or normally closed (NC).

How many types of solenoid are there?

There are four basic types of 3-way solenoid valves. Each of these different types is used for different purposes. Two of the main types include 3-way normally closed and 3-way normally open.

How are two way solenoid valves used?

Two-way valves are shut-off valves with one inlet port and one outlet port (Fig. 1). In the de-energized condition, the core spring, assisted by the fluid pressure, holds the valve seal on the valve seat to shut off the flow. When energized, the core and seal are pulled into the solenoid coil and the valve opens.

What is the purpose of solenoid?

A solenoid (/ˈsoʊlənɔɪd/,) is a type of electromagnet, the purpose of which is to generate a controlled magnetic field through a coil wound into a tightly packed helix. The coil can be arranged to produce a uniform magnetic field in a volume of space when an electric current is passed through it.

What is the function of the solenoid?

A solenoid is a device comprised of a coil of wire, the housing and a moveable plunger (armature). When an electrical current is introduced, a magnetic field forms around the coil which draws the plunger in. More simply, a solenoid converts electrical energy into mechanical work.

What is the working principle of solenoid?

The solenoid simply works on the principle of “electromagnetism”. When the current flow through the coil magnetic field is generated in it, if you place a metal core inside the coil the magnetic lines of flux is concentrated on the core which increases the induction of the coil as compared to the air core.

What are two functions of a solenoid?

Its primary function is as the actuating coil of a contactor (a relay designed for large electric currents) which connects the battery to the starter motor proper. All modern cars also use the starter solenoid to move the starter pinion into engagement with the ring gear of the engine.

When to use a de-energized solenoid valve?

Solenoid valves may be used in such a way that they spend most of their time de-energized, energizing only for brief periods of time when some special function is required. Alternatively, solenoids may be maintained in an energized state, and de-energized to perform their design function.

How are gas solenoid valves used in manufacturing?

Manufacturing facilities might use solenoid valves to control the movement of gases used in their manufacturing processes. Residential applications include solenoid valves used inside furnaces. These control when the gas comes on and is ignited by the pilot light to create warmth.

What happens when a solenoid valve is not closed?

In direct operating normally closed solenoid valves, when the solenoid is not energized, spring pushes the plunger and closes the valve. In this way when electrical current is not passed flow of fluid is restricted. Whereas when the solenoid is energized, a magnetic field is generated.

How does a latching solenoid valve work?

Latching Solenoid valves stay in their current position until power is applied. Therefore they can be either normally open or normally closed types of valve. For example, if a Bi-stable solenoid valve is open. When power is applied, it will switch its position and will get closed. As a result, they do not require a continuous power supply.