Food Grade Solenoid Valve – ZECO Valve

Working Principle of Solenoid Water Control Valve

Jerry — Mon, 27 Jun 2022 15:18:58 +0000

The pilot type solenoid valve with secondary opening valve is mainly composed of pilot valve and main valve, and the main valve adopts rubber sealing structure. At constant position, the movable iron core closes the guide valve opening, the pressure in the valve chamber is balanced, and the main valve opening is closed. When the coil is electrified, electromagnetic force is generated to suck up the active iron core, and the medium in the main valve chamber leaks out from the guide valve mouth, resulting in pressure difference. The diaphragm or valve cup is quickly lifted, the main valve mouth opens, and the valve presents a path. When the coil is cut off, the magnetic field disappears, the movable iron core is reset, the guide valve orifice is closed, and the pressure in the guide valve and the main valve chamber is balanced, the solenoid water control valve is closed again.

Solenoid water control valve: There is a closed chamber in the water solenoid valve. There are through holes in different positions, each of which leads to different tubing, with valves in the middle and two electromagnets on both sides. Where the magnet coil is electrified, the valve body will be attracted to which side, and the movement of the valve body will be controlled by electromagnetic water to stop or leak out different oil discharge holes. The intake holes are usually open, and the hydraulic oil will enter different discharge pipes. Then the piston of the cylinder will be driven by the pressure of the oil, and the piston rod will drive the piston rod, and the piston rod will drive the mechanical device. In this way, the mechanical motion is controlled by controlling the current of the electromagnet.

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2 Steps To Understand Solenoid Valve Working Principle

Jerry — Thu, 30 Dec 2021 07:21:21 +0000

The solenoid valve has an airtight cavity with through holes in different positions. Each hole is connected to a different oil pipe. In the middle of the cavity is a piston. On both sides are two electromagnets. The coil of the magnet on which the valve body is connected will be drawn to which side By controlling the movement of the valve body to open or close different drain holes, and the oil hole is always open, the hydraulic oil will enter different drain pipes, and then through the oil pressure to push the piston cylinder, the Piston, in turn, moves the Piston Rod driven mechanism. In this way, by controlling the current of the electromagnet, the movement of the machine can be controlled.

Solenoid Valve Working Principle

A solenoid valve is an electrically controlled valve. The valve features a solenoid, which is an electric coil with a movable ferromagnetic core (plunger) in its center. In the rest position, the plunger closes off a small orifice. An electric current through the coil creates a magnetic field. The magnetic field exerts an upwards force on the plunger opening the orifice. This is the basic principle that is used to open and close solenoid valves.

Solenoid Valve from the Principle is Divided into Two Categories:

Direct-acting solenoid valve

Principle: When energized, the electromagnetic coil generates electromagnetic force to lift the closing member from the valve seat, and the valve opens; when the power is off, the electromagnetic force disappears, and the spring presses the closing member against the valve seat, and the valve closes.

Features: It can work normally under vacuum, negative pressure, and zero pressure, but the diameter is generally not more than 25mm. The pilot-type solenoid valve adopts the method of opening the large valve by the small valve, the flow rate is large, and the large diameter is selected as the pilot type.

Pilot-operated solenoid valve

Principle: When energized, the electromagnetic force opens the pilot hole, the pressure in the upper chamber drops rapidly, and a pressure difference between the lower part and the lower part is formed around the closing member. The fluid pressure pushes the closing member upward to move the valve to open; when the power is off, The spring force closes the pilot hole, and the inlet pressure passes through the bypass hole to form a lower low and high-pressure difference around the valve member, and the fluid pressure pushes the closing member downward to close the valve.

Features: The direct-acting solenoid valve has a corresponding speed, and the action time is short. When the frequency is high, the direct-acting type is generally used.

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News – Top 5 Solenoid Valve Manufacturers

Jerry — Thu, 30 Dec 2021 07:17:36 +0000

Solenoid valves are widely used in a range of sectors due to the benefits they provide in terms of safe and speedy switching, dependability, extended service life, and compact design. They are, however, most often used in the household, industrial, appliance, and commercial sectors. Refrigeration, HVAC and air conditioning, agricultural air conditioning, power washing, pneumatic and hydraulic systems (motors, buffers, cylinders, etc. ), automotive engineering, compressed air systems, and domestic appliances are all examples of popular uses. For more information about solenoid valves, read this article.

The table below lists some of the top Solenoid Valve Manufacturers and Suppliers in the United States, as measured by yearly sales. Additional information about each business’s headquarters location, as well as the number of workers and descriptions of corporate operations, are given in what follows.

Which is the best solenoid valve?

Burkert is headquartered in the United States, has more than 70 years of experience in the field of liquid and gas process control, and is currently a leader in fluid control systems. Burkert is committed to solving fluid system challenges for various industries and providing high-quality products and excellent solutions.
Burkert products include water solenoid valves, steam solenoid valves, high pressure solenoid valves, low temperature solenoid valves and so on.

Solenoid Solution is a company dedicated to providing automation solutions for various industries to help you build high-performance solenoid valve systems. Solenoid Solution provides professional design services to help you design systems, optimize space and improve work efficiency, while reducing costs.
Solenoid Solution has a complete solenoid valve series, such as 2-port solenoid valve, 3-port solenoid valve, gas solenoid valve, water solenoid valve, etc. Solenoid Solution also provides solenoid valve customization services.

MAC Valves was established in 1948 and is a leading manufacturer of flow control systems. At present, MAC has more than 100 valve technology patents, and its business is all over the world. If you have any urgent needs, MAC can provide quick response services.
Products can be used in automobiles, textile industries, cement plants, filling systems, food processing, etc.

International Polymer Solutions has a history of more than 60 years. Ipolymer is customer-oriented and is committed to providing customized solutions for various industries. Solenoid valves produced by Ipolymer have unparalleled chemical compatibility and can be used in the biomedical, pharmaceutical, food and sanitary industries.

Magnatrol has a history of more than 75 years and has been committed to producing various solenoid valves for process control. The product can be used to regulate water, steam, air, oil, etc., and can be used in chemical, electric power, water and wastewater industries. Products are 100% made in the United States.

The History of Solenoid Valves

The first solenoid valve was the solenoid control valve, sold and manufactured in 1910 by ASCO Numatics. Then, in the 1950s, 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.

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 1990s, 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.

Standards of Solenoid Valves

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.

Solenoid Valve Types

3-Way Solenoid Valves
12 Volt Solenoid Valves
Air Valves
Gas Solenoid Valves
Hydraulic Solenoid Valves
Miniature Solenoid Valves
Direct Operated
Indirect Operated
Semi-Direct Operated Solenoid Valve
Purge Valve
Actuated Ball Valve
Poppet Valve
Plastic Solenoid Valves
Pneumatic Solenoid Valves
High Pressure Solenoid Valves
Proportional Solenoid Valves
Rotary Solenoids Valves
Solenoid Air Valve Controls
Solenoid Water Valves
Stainless Steel Solenoid Valves

How do Solenoid Valves work?

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). In the de-energized state, a normally open valve is open and a normally closed valve is closed. When current flows through the solenoid, the coil is energized and creates a magnetic field. This creates a magnetic attraction with the plunger, moving it and overcoming the spring (D) force. If the valve is normally closed, the plunger is lifted so that the seal (F) opens the orifice and allows the flow of the media through the valve. If the valve is normally open, the plunger moves downward so that the seal (F) blocks the orifice and stops the flow of the media through the valve. The shading ring (C) prevents vibration and humming in AC coils.

Advantages of Solenoid Valves

There are many beneficial characteristics of solenoid valves that give them advantages over other valve types. For example, since solenoid valves are powered by natural pressure and electromagnetic force, they generally have fewer moving parts than other valves. This is widely considered to be a good design, since moving parts require maintenance.

In addition, solenoid valves can be easily operated by remote devices that activate the solenoid coil, making solenoid valves extremely useful for hazardous applications. Also, solenoid valves can use either hydraulic or pneumatic power because both can be activated or piloted by solenoids. However, pneumatic power is more commonly used because it is considered cleaner and lower maintenance than hydraulic power, due to the absence of degrading fluids which produce waste and must be maintained.

Finally, solenoid valves offer rapid and safe switching, compact design, high reliability and typically long service life.

Applications of Solenoid Valves

Solenoid valves are used in a wide range of applications, with high or low pressures and small or large flow rates. These solenoid valves use different operating principles that are optimal for the application. The three most important ones are explained in this article: direct acting, indirect acting, and semi-direct acting operation.

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EVERYTHING YOU NEED TO KNOW ABOUT FOOD VALVE

Jerry — Wed, 29 Dec 2021 07:31:39 +0000

The food and beverage industry spans a wide range of goods and processes with specific regulations. In order to meet strict regulatory demands, manufacturers must understand exactly what each system needs to function as efficiently as possible. Understanding the complexities of the food and beverage industry will help you find the best working parts for your system.

What is food valve?

Valves for food are essentially used in industries requiring highly controlled environments and where process cleanliness is of utmost importance. They are widely used in food and beverage industries where controlled processes ensure that the manufactured products are in line with the safety standards.

What valves are used in the food industry?

When it comes to food processing, one of the most commonly used valves on the market to use is a solenoid valve. Many solenoid valves are designed to withstand humid and corrosive environments and extreme room temperatures.

Valves are a critical piece of equipment in the food and beverage industry. To achieve the best products and guarantee safety in your processes, the right valve must be chosen for operations. This will ensure proper functionality and minimize malfunctions down the line. When choosing a valve for your system, there are a few things to keep in mind. Here’s what you need to know about valves in the food and beverage industry.

Valves can be grouped into two categories.

Valves in the food and beverage industry can be categorized as either direct valves or utility service valves. Direct valves are used in systems that directly handle food. They come into contact with everything from milk and soda to condiments and meat. These valves are heavily regulated by a variety of independent organizations, like the Food and Drug Administration (FDA) and 3-A Sanitary Standards. For example, the valves must be smooth enough to prevent trapping food particles and allowing bacteria to grow. Stainless steel is often used for these types of valves because it is able to withstand corrosive agents.

Utility service valves do not come in direct contact with food. Instead, they handle utilities like steam or water that play a large role in food and beverage production. Although they do not directly contact products, they are still required to follow specific regulations to ensure safety.

Valves Boost Food Safety

Valves are an essential tool to block off pathogens and unwanted materials from entering food and beverages during processing. The need for sanitary valves in the industry is steadily growing and becoming a major focal point for manufacturers working on preventative safety. For example, sanitary valves used in the dairy industry handle some of the most perishable products and must follow regulations set by the Pasteurized Milk Ordinance (PMO). These valves must have tight shut-off capabilities to prevent leakage and cross-contamination.

Valves Support Automation

The biggest concern for food and beverage manufacturers is how to create and deliver products in the quickest and safest way possible. One of the best ways to minimize error and ensure consistency is through automation. While the introduction of pathogens is unavoidable, automation does reduce the risk of these unwanted materials entering the system.

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Types of Solenoid Valve – Explosion Proof Solenoid Valve – Solenoid Valve with Timer

Jerry — Wed, 29 Dec 2021 05:17:29 +0000

ZECO, as a manufacturer of solenoid valve. We focus to be an automation solution provider and offer reliable, safe, zero leakage, and affordable solenoid valves to you. Such as directing cating type, pilot operated type, waterproof IP68 type, anti-crossive type, high temperature type, high pressure type, auto-drain type, RO system type, home appliance type, food safe type and pulse valves for your various industries for fluid control.

What is a Solenoid Valve?

A solenoid control valve is a kind of isolation valve that is an electromechanical device allowing an electrical device to control the flow of gas or liquid. The electrical device causes a current to flow through a coil located on the solenoid valve, which in turn results in a magnetic field that causes the displacement of a metal actuator. The actuator is mechanically linked to a valve inside the solenoid valve. This mechanical valve then opens or closes and so allows a liquid or gas either to flow through, or be blocked by the solenoid valve. In this control system, a spring is used to return the actuator and valve back to their resting states when the current flow is removed. Figure 4.16 shows the application of a solenoid valve in a typical control system. A coil inside the solenoid valve generates a magnetic field once an electric current is flowing through. The generated magnetic field actuates the ball valve that can change states to open or close the device in the fluid direction indicated by the arrow.

How does a Solenoid Valve work?

Applications for Solenoid Valves

Our solenoid valve program includes valves for air, steam, oil, and gas, suiting a number of industrial applications that require high performance in these and other applications:

Laundry and dry-cleaning equipment
Industrial washing equipment
Autoclaves/sterilizers
Compressors and vacuum pumps
Plastic moulding machinery
Steam boilers
Food processing machinery
Sprinklers and fire fighting systems
Dentist equipment
Coffee machines
Boilers

Advantages of Solenoid Valves

Clip-on coil
Coil range up to IP67
Best water hammer damping
Long lifetime and high performance
Insensitive to dirt
Broad range and customized solutions

Different type Solenoid Valves:

1. High Pressure Solenoid Valve

high pressure solenoid valve

Size Range: 1/4″ to 1/2″
Pressure Range: 0.1~25MPa
Material: Stainless Steel
Seal: PTFE, EPDM, NBR seat
Media: Water, hot water, compressed air, oil

2. Auto Drain Solenoid Valve With Timer

auto drain solenoid valve

Size Range: 3/8″ to 2″
Pressure Range: 0~1.0MPa
Material: Brass, Stainless Steel
Seal: PTFE, EPDM, NBR seat
Media: Water, hot water, compressed air, oil

3. Electric Automatic Drain Timer Solenoid Valve

Electric Automatic Drain Timer Solenoid Valve

Size Range: 3/8″ to 2″
Pressure Range: 0~1.0MPa
Material: Brass, Stainless Steel
Seal: PTFE, EPDM, NBR seat
Media: Water, hot water, compressed air, oil

4. Tri Clamp Food Grade Sanitary Solenoid Valve

sanitary food grade solenoid valve

Size Range: 3/8″ to 2″
Pressure Range: 0~10Bar
Material: Stainless Steel
Seal: PTFE, EPDM, NBR seat
Media: Milk, Soft Drink, Water, etc

5.ZFEX2W Diaphragm Explosion Proof Solenoid Valve

EX2W Diaphragm Explosion Proof Solenoid Valve

Size Range: 3/8″ to 2″
Pressure Range: 0.0~1.0MPa
Material: Stainless Steel
Seal: PTFE, EPDM, NBR seat
Media: Milk, Soft Drink, Water, etc

What is an Explosion Proof Solenoid Valve?

An explosion-proof solenoid valve must have a coil or enclosure that is able to contain any explosion originating from within the coil or housing and prevent any internal spark from igniting any combustible gas, vapors or particulates in the surrounding environment that could cause a much larger explosion.

There are a number of standards for classifying equipment for hazardous environments. The most common we see are; NEMA (National Electrical Equipment Manufacturers Association (USA)), IEC Ex (International Electrotechnical Commission Explosive (global)) and ATEX (ATmosphères EXplosibles (EU)). If you are purchasing an explosion-proof solenoid valve be sure you see one of these marks on the valve, which may vary depending on which standard was followed.

NEMA has four hazardous location enclosure ratings (7-10) which correspond to specific environments (indoor/outdoor) and materials (explosive gases and particulates). NEMA follows the NEC (National Electric Code) Divisions System for Gas & Dust Groups. The IEC Ex & ATEX have a Zone System for Gas & Dust Groups. They cover many of the same materials but are laid out differently.