What is a solenoid valve and how does it work?


What is a solenoid valve?
The definition of a solenoid valve can be an electro-mechanical valve that is usually employed to regulate the flow of liquid or gas. There are many solenoid valve types, but the key variants are either pilot operated or direct acting. Pilot operated valves, the hottest, utilise system line pressure to open and close the key orifice in the valve body.

While Direct operated solenoid valves directly open or close the key valve orifice, which is the one flow path in the valve. They in systems requiring low flow capacities or applications with low pressure differential over the valve orifice.

How solenoid Solenoid Valve Manufacturers
How a solenoid valve works is by controlling the flow of liquids or gases in an optimistic, fully-closed or fully-open mode. They are generally used to replace manual valves or for handy remote control. Solenoid valve function involves either opening or closing an orifice in a valve body, which either allows or prevents flow through the valve. A plunger opens or closes the orifice by raising or lowering within the sleeve tube by energising the coil.

Solenoid valves consist of a coil, plunger and sleeve assembly. In normally closed valves, a plunger return spring holds the plunger resistant to the orifice and prevents flow. After the solenoid coil is energised, the resultant magnetic field raises the plunger, enabling flow. If the solenoid coil is energised in a normally open valve, the plunger seals from the orifice, which prevents flow.

Why is a solenoid valve used?
In most flow control applications, it’s important to get started on or stop the flow in the circuit to manage the fluids in the machine. An electronically operated solenoid valve is usually used for this specific purpose. When you are solenoid actuated, solenoid valves can be found in remote locations and could be conveniently handled by simple electrical switches.

Solenoid valves will be the most frequently used control elements in fluidics. They are generally used to shut off, release, dose, distribute or mix fluids. Because of this, they are found in many application areas. Solenoids generally offer fast and safe switching, long service life, high reliability, low control power and compact design.

Where is a solenoid valve used?
Solenoid valve applications add a broad range of professional settings, including general on-off control, plant control loops, process control systems and different oe manufacturer applications, to call but a few.

Solenoid valves can be found in many different sectors, including:

Water supply
Treatment of drinking water
Waste water treatment
Purification/ treatment of grey and black water
Machine and plant engineering
Cooling, lubrication and dosing
Building services
Large heating systems, climate control
Safety engineering
Water mains protection and fire extinguishing systems
Pressure relief and drainage
Fuel supply
Transport and tank facilities
Firing systems
Oil and gas burner control
Gas chromatography
Gas mixture regulation
Blood analysis instruments
Control of cleaning processes
How to replace solenoid valves
For correct and accurate control functioning, solenoid valves must be configured and selected in line with the particular application accessible.

The lower the valve’s orifice, or the more robust the coil, the bigger the pressure the valve can shut-off. On such basis as the calculated Kv value, and the pressure selection of the planned application, a correspondingly appropriate valve type and its own required orifice can be determined.

Where to buy a solenoid valve
From welding robots to waterworks, from dust removal in mining functions to cabin pressure control in aircraft – everything is possible with our valves as a reliable component in your system. Whether you single valve, valve blocks or customised solutions, our entire product line is oriented toward ensuring manipulated handling of liquids and gases.

Our products are made to deliver:

High overall flexibility due to modular design
Diverse choice of materials
High reliability and long service life
Low environmental impact

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