Company Profile
Automotive solenoid valves and sensors are our company's featured products. At the same time, our company is also a professional manufacturer specializing in the production of solenoid valve coils and special solenoid valves and other automation supporting components. Most of our products are used in pneumatic, hydraulic and other automation control component industries. At present, our products have been used by many internationally renowned brands and are deeply trusted by our customers.
Why Choose Us
Advanced Equipment
Flying Bull (Ningbo) Electronic Technology Co.,Ltd has an excellent team with more than 20 years of experience in design and development, focusing on the design, development and production of auto solenoid valve and sensor, engineering machinery solenoid valve and sensor.
Rich Experience
The company adheres to the business philosophy of "expert quality, global trust" and the business purpose of "pursuing quality, never ending".
High Quality
Quality is always our Flying Bull's unchanging concept. The company has established a research and development center, measurement room, laboratory, and chemical analysis room, and launches a number of high-tech products every year.
Professional Team
The company has strong R&D capabilities to lay a good foundation for the development and cooperation of new products for customers. First-class talents, advanced equipment, strict quality control system, scientific management, perfect service, and strong R&D capabilities, let us work together to become industry pioneers and win an unlimited future.
Electromagnetic automotive solenoid valve (otherwise also known as automotive solenoid valve) are valves controlled by electric current. They consist of two main parts - the valve body and the solenoid (coil). The solenoid is composed of a wound copper wire that surrounds a core with a movable closing plunger. The task of the coil is to create a magnetic field by means of a passing electric current, which then moves the piston and either opens or closes the valve.
Automotive solenoid valve come in the common two-way, or even more complex three-way and multi-way constructions used for flow switching and mixing. Most often, valve bodies are made of brass, stainless steel, aluminum or even plastic. Before purchasing always check that the material is suitable for the intended use and is compatible with the medium.
Benefits of Automotive Solenoid Valve
Safety
Internal and external leakage is a factor endangering safety. Other automatic control valves usually extend the valve stem, and the electric, pneumatic and hydraulic actuators control the rotation or movement of the valve core. This will solve the leakage problem of the long-term action valve stem dynamic seal.
Cost performance
The automotive solenoid valve itself is simple in structure and low in price. It is easier to install and maintain than other types of actuators such as control valves.
Because the automotive solenoid valve is controlled by the switch signal, it is very convenient to connect with the industrial control computer. In today's era when computers are popular and prices are falling sharply, the advantages of automotive solenoid valves are even more obvious.
Energy-saving applicability
The response time of the automotive solenoid valve can be as short as several milliseconds, and even the pilot-operated automotive solenoid valve can be controlled within tens of milliseconds. Because of its own loop, it is more sensitive than other automatic control valves. A properly designed automotive solenoid valve coil has low power consumption and is an energy-saving product.
Scope of application
The progress of automotive solenoid valve technology is also focused on how to overcome congenital deficiencies and how to better play to the inherent advantages. It is widely used, and the automotive solenoid valves have various models. Although they have congenital shortcomings, their advantages are still very prominent. Therefore, they are designed into a variety of products to meet various needs.
Type of Automotive Solenoid Valve
Direct-acting valves
These solenoids have a coil that magnetically opens the valve in a direct action, causing the shaft and the seat of the valve to shift. Direct-acting solenoid Valves use the energy produced by the magnetic field of the solenoid to operate the valve. When the electrical current is removed, a mechanical spring returns the valve to its original position.
Two-way valves
This is the most common type of solenoid valve. Two-way valves have two ports, which are used alternately to allow flow as well as close it off. A two-way valve can be “normally open” or “normally closed” in its operation. With a normally open valve, the valve remains open until a current is applied to close the valve. When the electrical power is suspended, the valve automatically reopens to its normal state. A normally closed solenoid valve remains closed until a power source causes it to open.
Pilot Operated solenoid valve
Pilot-operated solenoid valves are also known as indirect acting valves. These valves use the differential pressure of the medium to open and close the valve. These valves provide high flow rates and it operate at high pressure and temperature ranges, with lower power consumption.
Three — Way solenoid valve
The 3 -way solenoid valves come with three ports and it is a commonly used valve. It is used when alternate and exhaustive pressure are required for operation. In three-way valves only two ports can be connected at a time. The three possible setups can be achieved by three-way valves, these setups are.
Applications of Automotive Solenoid Valve
Industrial Automation
Solenoid valves are employed in automated assembly lines, pneumatic and hydraulic systems, and in the control of machinery and robotic devices. Their precision in controlling fluid flow makes them ideal for applications requiring exact dosing, timing, and sequencing, thereby enhancing efficiency, safety, and productivity in manufacturing and processing industries.
Home Appliances
Solenoid valves are also integral to the operation of many household appliances, contributing to convenience and energy efficiency. In washing machines and dishwashers, they control the entry and exit of water, ensuring that the right amount of water is used for each cycle. Refrigerators utilise solenoid valves in their ice makers and water dispensers, while irrigation systems use them to regulate water flow in different zones of a garden or lawn according to a set schedule.
Medical and Dental Equipment
The precision and reliability of solenoid valves are critical in medical and dental applications, where they control the flow of gases and liquids in various devices. In ventilators, solenoid valves regulate the flow of air and oxygen, essential for patient care in critical conditions. Dialysis machines use these valves to manage the flow of blood and dialysis fluid, and dental chairs employ them to control water and air flow for various tools and functions.
Top Ten List for Improving Process Steam Systems
Valves in various systems, including fuel injection, transmission, and emission control systems. In fuel injection systems, solenoid valves ensure precise fuel delivery for optimal engine performance and fuel efficiency. Transmission systems use these valves for the hydraulic control of gears, while emission control systems rely on them to manage the recirculation of exhaust gases, reducing harmful emissions.
Pressure and Flow Requirements
The operating pressure and the required flow rate of the system are critical in determining the type of automotive solenoid valve needed. Direct acting valves are typically used for low flow rates and low to medium pressures, whereas pilot operated valves are suited for high flow rates and higher pressures. It’s important to choose a valve that can handle the system's maximum operating pressure to ensure reliable performance.
Valve Size and Type
The size of the valve should be appropriate for the piping it will be connected to and sufficient to meet the flow rate requirements of the system without causing excessive pressure drop. Additionally, the type of automotive solenoid valve—whether 2-way, 3-way, or 4-way—needs to align with the system's functional requirements, such as whether the application requires simply turning a flow on and off, diverting flow between different paths, or controlling flow to multiple outputs.
Voltage and Power Considerations
Automotive solenoid valves require electrical power to operate. The available power supply (AC or DC) and the voltage level will influence the selection of the valve's solenoid coil. It’s essential to choose a valve with a coil that matches the system's power specifications to ensure proper operation and avoid electrical issues.
Environmental Conditions
The environment in which the automotive solenoid valve will operate can also impact the selection process. Factors such as temperature, humidity, and exposure to corrosive elements or hazardous locations require careful consideration. Valves designed for extreme temperatures or hazardous environments must meet specific standards and certifications to ensure safe and effective operation under those conditions.
Automotive Solenoid Valve Components
Coil
The coil is one of the main parts of the solenoid which consists of an insulated copper wire wound tightly around a core tube. As described earlier, a magnetic field is generated when current is applied.
Core
The core, also referred to as the armature or plunger, is the moving part of a solenoid. This is a soft magnetic metal; soft, meaning a ferromagnetic metal that can easily be magnetized and demagnetized at low magnetic fields. When the coil is energized generating a magnetic field, the core is attracted which opens or closes the valve.
Core Spring
The core spring returns the core to its original position when the magnetic field is removed. The core spring design and configuration in the solenoid assembly varies depending on the valve operation. In some designs, such as the latching type automotive solenoid valves, it does not use springs to create a return action.
Core Tube
The core tube is where the coil is wound. This also acts as a soft magnetic core which improves the magnetic flux generated by the coil.
Fixed core
This is installed at the closed end of the core tube which also improves the magnetic flux. The material is also a soft magnetic metal.
Diaphragm
The diaphragm is a flexible material that isolates the solenoid assembly from the fluid. The diaphragm is designed to contain the pressure of the fluid.
Stem
The stem is part of the valve where the core or plunger is attached. As the core is attracted by the coil, the stem moves along with it actuating the valve.
Disc
The disc blocks the flow of fluid when the valve is closed. In some automotive solenoid valve designs, diaphragms, bellows or pinch devices are used instead of a disc to block fluid flow. Depending on the application, the disc is usually made of corrosion and erosion resistant materials such as PTFE or stainless steel.
Seat
The seat is the orifice that presses against the disc when closing the valve. Like the disc, the seat may not be present depending on the valve design. The seat is also made of corrosion and erosion resistant material. Once the seat or disc is damaged, the valve will become passing and unable to stop flow.
Seal
The seal, like the diaphragm, isolates the solenoid assembly and the external environment from the fluid. Depending on the application and the process fluid, there is a variety of seal materials available such as PTFE, FKM, NBR and EPDM.
Bonnet
The valve bonnet seats at the top of the valve body. The core tube and stem extend through the bonnet and into the valve.
Body
The body is the main part of the valve which holds the diaphragm, disc, seat and the inlet and outlet ports.
Bleed Orifice
For indirect or semi-direct acting automotive solenoid valves, a bleed orifice is installed on the diaphragm. Some valve designs use an equalizing hole. The bleed orifice enables the valve to use the line pressure to open or close the valve.
Pilot Channel
For indirect acting automotive solenoid valves, a pilot channel is included into the valve body. This is where fluid flows from the top of the diaphragm and into the downstream side of the valve.
Direct-acting valves require no differential pressure to remain in their rest state and in the NC version, they will only allow flow once energized. These valves are very robust and can be used in a process line for simple isolation purposes of for safety purposes. The can also be used on the outlet to a tank where sometimes pressure can get very low but the valve needs to remain open.
In-direct acting valves require a pressure differential across the inlet and outlet to allow them to stay in their rest state. For example if a valve was normally open and there was not a large enough pressure differential, the valve could be intermittent and possibly close if inlet pressure dropped too low. These valves should only be used if pressure levels are within the parameters specified in the datasheet and IOM instructions.
Forced-lift valves are used in high pressure applications where neither of the above valve types can deal with the higher pressure processes such as 40 Bar plus. This valve uses a much bigger and higher power coil to open or close and the seat of the valve is directly connected to the bottom of the piston/plunger assembly eliminating the need for a diaphragm.
No, a solenoid valve is not the same as a regulation valve. While solenoid and regulation valves control the flow of fluids or gases within a system, they operate differently and serve different purposes.
Solenoid valves use an electromagnetic solenoid coil to trigger a plunger or armature, allowing for rapid on/off control of the flow. They are often used for applications requiring quick response times, such as shutting off flow in emergencies or activating specific functions in automated systems.
In contrast, regulation valves are designed to precisely regulate a fluid or gas’s flow rate or pressure within a system. They typically feature more-complex mechanisms, such as throttling or pressure-reducing devices, to maintain a constant flow rate or pressure over various operating conditions.
Automotive solenoid valves and sensors are our company's featured products. At the same time, our company is also a professional manufacturer specializing in the production of solenoid valve coils and special solenoid valves and other automation supporting components.
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As one of the leading automotive solenoid valve manufacturers and suppliers in China, we warmly welcome you to buy high-grade automotive solenoid valve made in China here from our factory. All customized products are with high quality and competitive price.
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