Solenoid valves are control units which, when electrically energized or de-energized, either shut off or allow fluid flow. The actuator takes the form of an electromagnet. When energized, a magnetic field builds up which pulls a plunger or pivoted armature against the action of a spring.

How do water solenoid valves work?

Solenoid valves consist of a coil, plunger and sleeve assembly. Once the solenoid coil is energised, the resultant magnetic field raises the plunger, enabling flow. When the solenoid coil is energised in a normally open valve, the plunger seals off the orifice, which in turn prevents flow.

What is a Namur valve?

NAMUR solenoid valves are used to control media flow. The valve’s electric solenoid opens or closes the valve by controlling the amount of air via a pilot to the pneumatic actuator. The valve is operated in either the normally closed or normally open position.

What is direct acting solenoid valve?

Direct acting solenoid valves, also known as zero rated solenoid valves, are electro-mechanical valves that are used to control the flow of liquids or gases.

What is normally closed valve?

Normally closed valves are designed to block flow through the valve and are commonly used for emergency safety. During usual operation, these devices use a spring to remain closed. The valve will open when the system begins to experience overpressure to ensure safety.

Why do you need a solenoid?

Why are Solenoids Important? Solenoids are critical car components since they allow your ignition system to reach the starter motor and, in turn, cause your car to turn on in the first place. Without a solenoid, turning your key wouldn’t start your car at all.

What is NAMUR solenoid?

A NAMUR solenoid valve is directly mounted to pneumatic actuator inlet/outlet ports. The function of a NAMUR solenoid valve is to control media flow: the valve itself is controlled by an electric solenoid, which opens or closes the valve, by controlling the amount of air thru a pilot to the pneumatic actuator.

What is the meaning of NAMUR?

Normenarbeitsgemeinschaft für Mess- und Regeltechnik in
Answer: NAMUR is an acronym for “Normenarbeitsgemeinschaft für Mess- und Regeltechnik in der chemischen Industrie”. NAMUR was originally founded as a body to represent users of measurement and control technology within the Chemical, Pharmaceutical and Petrochemical industries.

What is the difference between direct and indirect solenoid valve?

Direct operated solenoids don’t require a minimum operating pressure or pressure difference either. So, they can be used up to the maximum allowable pressure. Indirect solenoid valves operate differently to direct operated solenoids and use the differential pressure of the media over the valve ports to open and close.

What is external pilot air supply?

External Pilot Operated Valves – With these types of valves, an independent external pilot source is used for controlling the pressure for actuation purposes. These valves are either piston or diaphragm types and may be actuated by either air or liquids. Pilot pressure is interrupted when the solenoid is energized.

What is a Soval check valve used for?

Soval check valves are used to prevent back flow in a pipeline. It’s a a one-way valve, in which the flow freely one way, but if the flow turns the valve can close to protect the piping, other valves, pumps etc.

What material are Soval plug valves made of?

In addition, all fasteners and washers are constructed from stainless steel material. Soval plug valves incorporate a nickel welded seat for long service life and are designed primarily for applications where slurries, solids, or grit are present.

What are Soval fittings used for?

They are designed for both on-off function and process control in industrial and municipal applications. Soval galvanized fittings are commonly used in supplying water to residential homes, but it can also be used for irrigation on farms, water treatment and large commercial construction settings.

What is a butterfly valve?

A butterfly valve is a specialized control valve used to control liquid or gas flow through pipes. The rotating disc in the valve is controlled by an exterior wheel, allowing it to be completely shut off when necessary. Butterfly valves contrast with valve types like steel globe valves, steel gate valves, check valves, and solenoid valves.