What are the applications and advantages of solenoid valve box? Which one produces better?

Shanghai Woli electromechanical equipment **** solenoid valve box features:

Adopt SUS304 SUS316 stainless steel plate; cold-rolled steel plate with surface spraying; surface brushed and polished treatment; The door and the box are sealed with highly elastic PU foam.

Zhengzhou Chengkai pneumatic components specializes in the sale of various solenoid valves 0371-53769755

Anshan solenoid valve 0412 7822962 Liu Yuhua.

1. Solenoid valve box application:

It is generally used in thermal power plants, dust removal systems, chemical water systems, and boiler feed systems.

Second, the introduction of solenoid valve box:

1. The structure of the solenoid valve box is basically divided into:

SUS304 stainless steel plate cold-rolled steel plate production, argon arc welding, wire drawing and polishing on the outer surface of the box spraying, according to the installation position can be divided into indoor and outdoor two ways, according to the installation form can be divided into wall-mounted or with underframe installation mode.

2. The solenoid valve box is roughly divided into three types: down in and out (the solenoid valve is installed horizontally, the pipelines are in and out from the bottom of the box, the rain shelter can be used outdoors, and the filter is installed in the box), the bottom in and out (the solenoid valve assembly is installed vertically, the side is in and out, the bottom of the cable is in and out, the pipeline is in and out from the bottom and top of the box respectively, and the filter is installed in the box), and the bottom in and out (the gas circuit is connected by a hard pipe, and the pipeline is in and out from the bottom and top of the box respectively, and the filter is installed in the box), which can meet different on-site needs.

3. Configuration in the box.

Solenoid valve: all stainless steel metal sealed or ceramic sealed solenoid valve.

Busbar: Professionally designed and manufactured according to the space of the valve box and the customer's equipment space.

Piping: Hose (PU, nylon), copper pipe, stainless steel pipe.

Connectors: Quick-insert, quick-screw, copper ferrule, stainless steel ferrule.

Control mode: remote local switching.

Air source treatment: single filtration, single filtration and pressure regulation; Double Filtration Double Filtration Pressure Regulation.

Other: Lighting in the box Temperature regulation in the box.

4. If you choose the bus valve box, its advantages:

1) Long transmission distance.

Due to the use of fieldbus interface, for a group of valves, the cable from far to the place only needs 1 pair, that is, the fieldbus communication cable, adopts digital transmission, has good anti-interference, and the transmission distance is far (up to several kilometers).

2) Automatic signal transmission.

There is no need to be equipped with input and output modules in the distance, and all signals are soft signals, which are automatically realized through bus transmission. The equipment in the remote (control room) was greatly reduced.

3) High reliability.

Since the valves, communication modules, and IO modules are integrated, the reliability is greatly improved.

4) Cost reduction.

Due to the small number of cables and corresponding cable trays, the corresponding cost of labor costs is reduced, the reliability is greatly improved, and the maintenance is convenient.

5) Easy to operate.

Directly operated in the DCS, one set of equipment meets the needs of both local and remote operation, reducing the probability of failure.

Toyota automatic transmissions, most of which have three solenoid valves on the valve body, including two shift solenoids and one lock-out solenoid valve.

What is a solenoid valve? Solenoid valve is an industrial equipment controlled by solenoids, which is used to adjust the direction, flow, speed and other parameters of the medium in the industrial control system. The solenoid valve is controlled by the effect of electromagnetism, and the main control mode is controlled by the relay.

In this way, the solenoid valve can be combined with different circuits to achieve the desired control, and the precision and flexibility of the control can be guaranteed. There are many kinds of solenoid valves, and different solenoid valves play a role in different positions of the control system, the most commonly used are check valves, safety valves, directional control valves, speed regulating valves, etc.

Solenoid valves are divided into three categories in principle:

1) Direct-acting solenoid valve:

Principle: When energized, the electromagnetic coil generates electromagnetic force to lift the closing part from the valve seat and the valve opens; When the power is off, the electromagnetic force disappears, the spring presses the shut-off 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.

2) Step-by-step direct-acting solenoid valve:

Principle: It is a combination of direct action and pilot operated principle, when there is no pressure difference between the inlet and the outlet, after the power is on, the electromagnetic force directly lifts the pilot valve and the main valve closure up in turn, and the valve opens. When the inlet and outlet reach the starting pressure difference, after the power is applied, the pressure of the lower chamber of the electromagnetic pilot valve and the main valve rises, and the pressure of the upper chamber decreases, so as to use the pressure difference to push the main valve upward; When the power is off, the pilot valve uses the spring force or medium pressure to push the shut-off and move down to close the valve.

Features: It can also operate at zero pressure difference or vacuum and high pressure, but the power is large, and it must be installed horizontally.

3) Pilot operated solenoid valve:

Principle: When energized, the electromagnetic force opens the pilot hole, and the pressure in the upper chamber drops rapidly.

A pressure difference between the upper and lower levels is formed around the closure, and the fluid pressure pushes the closure to move upwards and the valve opens; When the power is off, the spring force closes the pilot hole, and the inlet pressure quickly forms a low and high pressure difference around the closing valve through the bypass hole, and the fluid pressure pushes the closing part to move down and close the valve.

Solenoid valves are commonly known as solenoid controlled valves, with a wide range. In the hydraulic and pneumatic system, there are solenoid switches, solenoid reversing valves, solenoid globe valves, solenoid relief valves, solenoid check valves, solenoid unloading valves and so on. The solenoid valve in the hydraulic and pneumatic system mainly refers to the solenoid reversing valve, which is mainly used to control the flow direction of liquid or gas and change the direction of movement of the actuator.

Which manufacturer is better, each has its own characteristics, and it is difficult to say clearly.

Solenoid valve is a device widely used in control systems, and its main function is to control the flow of liquids or gases through the action of electromagnetic force. A good solenoid valve has the following characteristics:

1.High precision: A good solenoid valve can accurately control the flow and pressure of liquids or gases, ensuring the stability and reliability of the system.

2.High efficiency: A good solenoid valve has the characteristics of fast response and efficient operation, and can complete the control task in a very short time.

3.Reliability: A good solenoid valve has a high degree of reliability and stability, and can operate for a long time without failure in harsh working environments.

4.Easy to install and maintain: A good solenoid valve has reasonable design, simple structure, easy to install and maintain, and reduces the cost of use and maintenance.

Keen imported solenoid valve.

As an international brand, the United States Keen KNKE has many years of experience and technical advantages, the United States Keen Keen Knke solenoid valve has the characteristics of high precision, high efficiency, reliability and easy installation and maintenance. If you need to buy solenoid valve products, KNKE is your trusted partner.

If you think it is helpful to you, please raise your noble hand and give a thumbs up to the American Kornke KNKE solenoid valve brand manufacturers!

If you have the purchase needs of solenoid valves, please go to the official website of KNKE to select and purchase, or ask KNKE professional and technical personnel to find the most suitable products for you.

1. Reliability.

Solenoid valves are divided into two types: normally closed and normally open; Generally, the normally closed type is selected, which is open when energized and closed when powered off; However, when the opening time is very long, the closed time is very short, and the normally open type should be selected.

Life test, the factory generally belongs to the type test project, to be sure that there is no professional scale of solenoid valve in China, so be cautious when selecting solenoid valve manufacturers. When the action time is very short and the frequency is high, the direct-acting type is generally selected, and the fast series is selected for large diameter.

Second, economy.

There are many solenoid valves that can be universal, but the most economical product should be selected on the basis of knowing enough to go to the three points.

The structural principle of the solenoid valve.

1: Direct-acting solenoid valve.

There are two types: normally closed type and normally open type. When the coil is energized, electromagnetic force is generated, so that the moving iron core overcomes the spring force and engages with the static iron core to open the valve directly, and the medium is in a path; When the coil is powered off, the electromagnetic force disappears, and the moving iron core is reset under the action of spring force, and the valve port is directly closed, and the medium is not passed. The structure is simple, the action is reliable, and it works normally under zero pressure difference and micro vacuum.

The normal type is the opposite. Such as solenoid valves with a flow rate of less than 6 orifice. (Figure 1 is a typical structural diagram).

2. Step-by-step direct-acting solenoid valve.

The valve adopts a single opening valve and a secondary opening valve in one, and the main valve and the pilot valve step by step make the electromagnetic force and pressure difference directly open the main valve port. When the coil is energized, the electromagnetic force is generated to make the moving iron core and the static iron core engage, the pilot valve port is opened and the pilot valve port is located on the main valve port, and the moving iron core is connected with the main valve core together, the pressure of the main valve upper cavity is unloaded through the pilot valve port at this moment, and the main valve core moves upward under the simultaneous action of pressure difference and electromagnetic force, and the main valve medium is opened smoothly. When the coil is powered off, the electromagnetic force disappears, at this time the moving core closes the pilot valve hole under the action of its own weight and spring force, and the medium enters the upper cavity of the main valve core in the balance hole at this time, so that the pressure of the upper cavity rises, and the main valve is closed under the action of spring return and pressure, and the medium is cut off.

The structure is fair, the action is reliable, and the work is also reliable when there is zero pressure difference. Such as: ZQDF, ZS, 2W, etc.

3. Indirect pilot operated solenoid valve.

This series of solenoid valves is composed of a pilot valve and a main valve core connected to form a channel; The normally closed type is closed when it is not energized. When the coil is energized, the generated magnetic force makes the moving iron core and the static iron core engage, the pilot valve port is opened, and the medium flows to the outlet, at this time, the pressure of the upper cavity of the main valve core is reduced, which is lower than the pressure on the inlet side, and the pressure difference is formed to overcome the spring resistance and move upwards to achieve the purpose of opening the main valve port, and the medium is smooth and smooth. When the coil is powered off, the magnetic force disappears, and the moving iron core is reset and closed under the action of spring force, at this time, the medium flows from the balance hole, the pressure of the upper chamber of the main valve core increases, and it moves downward under the action of spring force to close the main valve port.

The principle of normally open is the opposite.

Diaphragm opening and closing time, kv value, injection volume per unit time, etc.