Solenoid valves are electromechanical valves used to control the flow of liquids or gases.
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Solenoid Valves Solenoid valves are electromechanical valves used to control the flow of liquids or gases.
Solenoid Valves Solenoid valves are electromechanical valves used to control the flow of liquids or gases.
Solenoid valves are electromechanical valves used to control the flow of liquids or gases. Manufacturers produce solenoid valves for those seeking a mechanism that offers services such as: releasing, mixing, shutting off, dosing or distributing fluid or gas. Read More&#;
Versa® Products offers a wide range of pneumatic control valves, air valves and solenoid design. We have maintained our commitment to quality products and services since our company was established in . We are a solenoid valve manufacturer, offering solenoids in brass and stainless steel.
Deltrol Controls manufactures and designs a full line of stock and custom solenoids, electrical relays, dispensing valves, and custom switch assemblies. Customer satisfaction is our number one priority so we employ talented workers and stay up-to-date with the latest technology. Whatever your specific need is, Deltrol Controls has the solution. To receive a quote or more information please...
At Electric Solenoid Valves, we specialize in providing comprehensive solutions for solenoid valves, tailored to meet the diverse needs of our valued clientele. With expertise in fluid control systems, we have established ourselves as a trusted leader, known for our unwavering commitment to quality, innovation, and customer satisfaction. Our product offerings encompass a wide range of solenoid...
Our solenoid valves are all tested in house following very strict quality guidelines. We opened our doors in and ever since then we have been committed to bringing top of the line products and customer service that cannot be beat!
Solenoid Solutions manufacturers custom direct-acting 2 and 3-way solenoid valves and multi-valve manifolds for OEMs in the medical, appliance, transportation, power generation and industrial equipment markets.
Because of the advantages they offer in the way of safe and rapid switching, reliability, long service life, and compact design, solenoid are very popular in a variety of industries. However, they&#;re most frequently employed in the residential, appliance, industrial, and commercial industries.
Some common applications include refrigeration, HVAC and air conditioning, power washing, agricultural air conditioning, pneumatic and hydraulic systems (motors, cylinders, buffers, etc.), compressed air systems, automotive engineering and household appliance.
The first solenoid valve was the solenoid control valve, sold and manufactured in by ASCO Numatics. Then, in the s, manufacturers began distributing plastic molded solenoid valves. The switch to plastic meant that solenoid valves were now more efficient, reliable, corrosion resistant and chemical resistant.
Miniature Solenoid Valves &#; International Polymer Solutions
This trend of improvement continued on into the late 20th century. For instance, starting in the &#;70s, manufacturers began producing automatic shut-off solenoid valves, which were safer and easier to operate than manual control shut-off valves.
In the s, governments around the world, as well as independent organizations, began creating solenoid valve standardizations, which enabled a higher frequency of international trade, easier collaborations between companies and easier maintenance. Today, newer standards also restrict the use of hazardous substances in valve fabrication, so as to improve their environmental friendliness. Today, much of valve fabrication and use innovation is focused on health and sustainability.
Production Process
Manufacturers produce solenoid valves via a variety of processes, such as: CNC machining, laser welding, injection molding and coil winding. Once they&#;ve fabricated the valve components, they assemble them.
These components include: the solenoid valve coil, the valve, an inlet port, an outlet port, a spring, an orifice and an actuator. Often, solenoid also feature seals.
Materials
Manufacturers have a wide variety of materials available to them with which to construct their solenoid valves. Valves may be made from both plastic and metal materials, such as PVC, natural polypropylene, PTFE, CPVC, stainless steel, bronze, aluminum, and brass. Seals, like viton seals or nbr seals, are usually made from some sort of rubber. Occasionally, manufacturers will make stainless steel seals.
Design and Customization
Solenoid valve manufacturers make choices based on application specifications such as: nature fluid/gas inside pipe (corrosiveness, hazardousness, viscosity, acidity, etc.), environment, frequency with which the pipe will be used and application standard requirements. Based on the specifications, they can choose design aspects like: valve size, valve material, valve type and configuration and number of ports.
Suppliers may customize your solenoid valve system in a number of ways. For instance, they normally create valves with two connection areas and one orifice, but they can also make you valves with three connection areas and two orifices. Likewise, while they usually design valves to run using a 12-volt DC power source, they can also customize them to work with 3-volt, 6-volt or 24-volt power sources. They may also provide you with specialized: pressure levels, spring return, valve size, etc.
Solenoid valves function using two main components: a solenoid coil and a valve. The coil is a magnetized wire coil that comes alive from a series of electrical charges and then emits a current flow. This current flow generates a magnetic field that converts electrical energy into mechanical to move the actuator. The actuator is an extension of the valve; it, along with an attached string, is responsible for moving the valve from an opened to closed position.
Solenoid valves are generally built as either normally closed (NC) or normally open (NO) devices. Normally closed valves operate with an inner plunging rod or pin, called a plunger, held in place by the solenoid coil, that blocks current flow. To activate flow in an NC valve, an electromagnetic charge must be sent through the coil, which will then lift the plunger out of the way to allow flow. NO valves, on the other hand, are the opposite. They will close when the solenoid is activated.
Solenoid valves are defined by three general components, to help manufacturers select which valve may be best:
1. Material being controlled, like solenoid water valves and solenoid air valves
2. Valve construction/design, like proportional solenoid valves, 3-way solenoid valves and plastic solenoid valves
3. How they are powered, like 12-volt solenoid valves and pneumatic solenoid valves
Solenoid Water Valve
Solenoid water valves, also called hydraulic solenoid valves, direct water flow with pilot-operated, normally open valves.
Solenoid Air Valve
Solenoid air valves, also called gas solenoid valves, air valves or pneumatic solenoid valves, regulate air and gas flow with diaphragms and gas pressure. They are able to maintain both regular pressures, like those maintained for home heating and cooling, and extremely high pressures, like those regulated for power tool operation.
Proportional Solenoid Valve
Proportional solenoid valves work like regular pneumatic valves, aside from the fact that they operate with more advanced flow control capabilities, which allow them to establish variable flow, proportionate to the valve&#;s electrical control signal.
Twelve-Volt Solenoid Valve
Twelve-volt solenoid valves carry 12 volts, supplied by its DC power source. (Twelve volts are standard.)
Solenoid valves are either pilot-operated or direct-acting.
Pilot-Operated Solenoid Valve
A pilot-operated solenoid valve, which is a combination of either a hydraulic valve or a pneumatic valve and a smaller solenoid valve, uses a diaphragm rather than a plunger to create differential pressure and thereby control flow.
Direct-Acting Solenoid Valve
A direct-acting solenoid valve uses a plunger that has direct contact with the in-flow valve body opening, called an orifice. In this case, the plunger opens and closes the orifice to control flow.
Semi-Direct Operated Solenoid Valve
A semi-direct operated solenoid valve borrows attributes from both direct act and indirect act valves. This allows them to work from 0 bar (0 psi) while handling a high flow rate. Usually, they are used for high pressure applications.
High Pressure Solenoid Valve
High-pressure solenoid valves are excellent resources for flow control in areas that are incompatible with other valves, like in work areas that engage with dangerous machinery or inaccessible lines.
Stainless Steel Solenoid Valve
Stainless steel solenoid valves, as their name indicates, have a stainless steel body. Because stainless steel is corrosion and abrasion resistant, stainless steel solenoid valves work well with chemical processing applications, which require outstanding control of bases, acids, and analytical reagents.
Miniature Solenoid Valve
Miniature solenoid valves are the perfect size for delicate medical equipment like biotechnology equipment, portable medical devices, and gas analyzers.
Butterfly Valve
A butterfly valve is a solenoid valve that regulates or isolates fluid flow. Its closing mechanism is a rotating disc positioned in the center a pipe, where a rod passes it through it to an actuator on its exterior. When the actuator rotates, the disc will turn as well, either perpendicular or parallel to the flow. A butterfly valve is always present within a flow.
Actuated Ball Valve
An actuated ball valve is named as such because it contains a ball with a small hole in the middle, which helps it control material flow through a pipe, and an actuator that rotates the ball. When the actuator rolls the ball, the flow either starts or stops. One of the most common types of ball valve is the three-way ball valve, which has three ports. Primarily, actuated ball valves are used to start and stop flow, but not necessarily control it beyond that. Actuated ball valves are best for use with high flow applications and applications requiring the option for manual override.
Tubular Solenoid Valve
Tubular solenoid valves are simply tube-shaped solenoid valves. They are usually used with DC power applications only.
Poppet Valve
A poppet valve, sometimes called a mushroom valve, consists of an oval or round hole, along with a disc-shaped tapered plug located at the end of a shaft called a valve stem. The poppet valve, which can be closed or open type, is used for controlling engine air/gas flow quantity and timing. It is made from stainless steel or brass.
Brass Solenoid Valve
Solenoid valves made from brass are great for use with non-corrosive substances, like inert gas, water or light oil. They are not strong enough to carry highly corrosive substances.
PTFE Solenoid Valve
Solenoid valves made from PTFE, also recognized by its brand name Teflon®, are a great choice for harsh gases and corrosive fluids.
There are many reasons to purchase a solenoid valve over others. With fewer moving parts than other valves, solenoid valves are comparably low-maintenance. They are also operable by remote devices, which is an invaluable feature for hazardous applications. In addition, they can be made portable. Finally, solenoid valves are flexible; able to use either hydraulic or pneumatic power.
Typical solenoid valve accessories include: connectors, manifolds, screws, gaskets and lights. Of these, connectors are most common. They help you put together more complex valve assemblies. To find out what accessories are best for your application, talk to your manufacturer.
Either you, your supplier or a professional third party can install your valves. There is nothing wrong with not doing it yourself. If you do choose to install your valves yourself, though, take the following advice, as well as advice offered by your manufacturer:
Install solenoid valves at critical points in order to give any system the ability to work optimally for many years to come. Always make sure to install them in a dry and well-ventilated environment, because they can heat up quite a bit during operation, and you don&#;t want them to overheat or react with something around them. Keep an eye out for an arrow on the valve body, which indicates flow direction. Install it in that direction.
With a little attention, your solenoid valves will last for a long time. One way you can care for your valves is simply by cleaning them regularly on a set schedule. With the proper tools, like those provided in a maintenance kit, you can do so without fully disassembling your valve assembling. In addition to regular cleaning, if and when you notice leaks, excessive noise or sluggish operation, you should clean your valves as soon as possible.
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To improve valve system performance, avoid using mismatched fluids, as doing so can cause early wear. Also, never allow substances inside your valve to freeze. Likewise, always keep your valve contents at the proper temperature and pressures.
The standards to which your solenoid valves will need to adhere depend on your application, industry and location.
If your valves will be coming in contact with drinking water, for example, your solenoid valves must be lead-free. In the United States, drinking water and plumbing codes require RO (reverse osmosis) equipment must be NSF certified and/or meet NSF 61-G, a leachate and lead-free regulation put out by NSF (the National Science Foundation). If you&#;ll be using your solenoid valves abroad, they need to be certified lead-free by NSF International and accredited by both ANSI and the Standards Council of Canada.
In addition, NEMA (National Electrical Manufacturers Association) offers standard designations for valve suitability. Generally speaking, the higher the NEMA type number, the harsher the exposure the valve can withstand. For example, NEMA Type 1 valves are well-suited for indoor use, while NEMA Type 7 and 9 valves are best for environments that feature explosive dust or vapors.
When searching for solenoid valves for your application, you must make sure the manufacturer with whom you work is able to meet all of your specifications, including certifications, lead times and budget. Sometimes, it&#;s beneficial to look into quick-shipment programs, rather than standard shipping options. Don&#;t forget to talk to your prospective supplier about that. In addition, you should consider a manufacturer that offers a good support system. This means that they will be available for installation assistance, onsite training and availability for consultation, parts maintenance and parts replacement after installation.
Finally, it&#;s extremely important that you work with a manufacturer you can trust. To find an experienced and reliable supplier, check out the comprehensive list we&#;ve provided on this page.
Check out our Solenoid Valves website
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Solenoid valves are automatic flow control devices popular across different industrial applications. These valves feature a compact design, offer durable fluid service, require low power to operate and are quick-acting. How do these valves achieve unique performance characteristics? The answer lies in their designs and the electromagnetic action of the valve components.
Solenoid valve examples: 2-way, 3-way and 4-way styles. Photo credit: Emerson Automation Solutions, Fluid Control & Pneumatics
Solenoid valves comprise a valve body (containing orifices) and a solenoid. The solenoid consists of an inductive coil surrounding a ferromagnetic core, or plunger. Energizing the coil by passing electric signals creates a magnetic field through it. The magnetic field attracts the plunger and causes linear motion, moving the plunger within the valve body. The movement causes the sealing or opening of the various valve orifices. The magnetic force produced by energizing the solenoid is sufficient to overcome both inertia and the mechanical force of an opposing spring, thus, moving the plunger to a secondary position relative to orifice locations.
Solenoid valves are versatile and have diverse circuit designs; they can open or close the flow of fluids and control flow rates, as well as distribute or mix service fluids in a piping system. Typical application areas include automated process controls, on/off fluid service, hydraulic and pneumatic loops, water supply, fuel supply, air conditioning systems and wastewater treatment.
There are different types of solenoid valves based on the mode of actuation and number of flow paths. These distinct features determine the suitability of a particular solenoid valve for an industrial application. When evaluating or selecting solenoid valves for different pipe systems, engineers and system designers weigh additional features like valve response time, coil protection, solenoid material, and valve and seal materials. A description of the different types of solenoid valves follows:
The operation of these valves is solely dependent on the electromagnetic field. They do not require external pressure or a supplementary actuator to operate. Direct-acting solenoid valves can open or close even when there is no pressure difference across valves. The plunger will move in response to the electromagnetic field created by energizing the solenoid.
Stainless-steel and Numan-mount style solenoids.
Photo credit: Emerson Automation Solutions, Fluid Control & Pneumatics
A popular direct-acting solenoid valve is the 2-way valve that can be selected in the normally open or normally closed configuration. In a normally open solenoid configuration, a spring supplies the force to hold the seal away from the seat of the orifice, keeping the flow path open as long as the coils are de-energized. Applying electrical power creates an electromagnetic force that pushes the seal towards the seat and stops flow in the desired direction. The inverse is true for a normally closed circuit. Energizing the solenoid coil lifts the seal from the orifice seat, opening the flow path and permitting fluid flow.
Direct-acting valves have a compact design since the actuation mechanism is within the valve body. The flow rates and allowable pressure limits for fluids passing through direct-acting solenoid valves depend on the sizes of the orifices and the magnetic force that the solenoid supplies. They are suitable for applications having relatively low flow rates.
There is a unique type of direct-acting solenoid valve that can be selected in the normally open or normally closed configuration. These are called &#;bistable&#; or &#;latching solenoids&#;.
The operation of these valves requires some assistance from the pressure of the service fluid. They are common in fluid applications with a high-pressure operating range and high flow rates. The solenoids for these valves provide sufficient forces to control the opening and the closing of pilot orifices. When the pilot orifice opens or closes, it permits or expels fluid in or out of the top cavity and holds the valve diaphragms in appropriate positions.
In pilot-operated solenoids, the service media moves through the pilot orifice of the solenoid and applies some pressure on the top side of the diaphragm, holding it in a closed position. The valves contain mechanical springs that keep the diaphragms against the main valve orifice to block flow paths. No fluid flows past the valve. Energizing the solenoid causes the expulsion of the service fluids out of the top cavity and releases them to the main pressure line. It creates a pressure difference between the lower and upper sides of the diaphragm. The differential pressure overcomes the force of the diaphragm and the springs to open the main valve.
The orifice of the pilot valve is usually smaller than that of the main valve. Such orientations enable small-sized pilot valves to operate large valves using small amounts of energy. By comparison, these valves operate slower than their direct-acting counterparts. They are suitable for high-pressure hydraulic systems, steam facilities and high flow rate industrial processes.
These solenoid valves provide additional flow control beyond routine on/off fluid service in a piping system. They are appropriate for mixing fluids drawn from two different sources or diverting fluids from a common inlet to two destinations. The orientation of these valves can have one inlet port and two outlets or two inlet ports and a common outlet. These valves can offer reliable service for either mixing or diverting fluids depending on their configuration.
When used for diverting the flow of fluids, the 3-way solenoid valve will feature a single inlet port and two outlets. In its initial setup, fluid will flow from the inlet orifice and move out through one outlet while the other remains in a closed position. Energizing the solenoid coils diverts the flow from the initial open orifice to the secondary path that was an initially closed outlet. In mixing applications, one of the inlets is initially open, and the other is in a closed position. The open inlet transfers the fluid through the valve and ejects it through the common outlet. After energizing the solenoid coil, the plunger moves to a position that blocks the initially open orifice, while the secondary orifice opens to permit the flow of fluids.
Most solenoid valves can be predictably fixed to actuators to facilitate automated valve operations in different applications. Many applications require standard solenoid valves having specific mounting patterns and installation styles. They are referred to as NAMUR mount valves.
Specific solenoid mounting designs fit pneumatic actuators specifically designed to accommodate this standardized mounting pattern. The valves can provide 3-way, 4-way or even 5-way flow paths. Energizing the solenoids of these valves causes plungers to move into different positions and open or close the orifices accordingly. NAMUR mount valves selected for pneumatic applications should meet the flow conditions of the pipeline and appropriate response time to guarantee the precision of pneumatic applications.
Solenoid valves can improve the reliability of diverse flow applications by providing an inexpensive way to remotely actuate valves with a size and design that fits any fluid flow operation. When selecting these valves, ensure they meet the flow conditions of the pipeline and valve body materials, and that the seals are compatible with the service media.
Gilbert Welsford Jr. is the founder of ValveMan.com and a third-generation valve entrepreneur. He has learned valves since a young age and has brought his entrepreneurial ingenuity to the family business in by creating the ValveMan online valve store.
Check valves are self-actualizing devices that respond to both pressure and flow changes in a piping system.
In the complicated but vital industry of drawing oil and gas out of the earth and getting it to the surface, people often get confused about the difference between a Christmas tree assembly and a wellhead.
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