Knowledge About Valves

Three-way, pneumatic and air solenoid valve flow control technology

Three-way solenoid valve

As the name implies, the three-way solenoid valve has three interfaces (usually marked as A, B, and C), which can form two different flow path connection methods. Generally speaking, it can switch between two states: one state directs the medium from the input end to the output end, and the other state discharges the medium into the exhaust port.
This design makes the three-way valve particularly important in control systems that need to switch media or convert exhaust and supply. For example, in hydraulic or pneumatic systems, three-way solenoid valves are often used to control the reset of actuators or perform two-way action control. Its efficient on-off switching function can achieve higher system flexibility and response speed.

Pneumatic solenoid valve

Pneumatic solenoid valves are mainly used in compressed air systems, and their function is to accurately control air flow and pressure. This type of valve is driven by a solenoid coil and can respond quickly to control signals, achieve rapid opening and closing, and reduce energy loss in the system.
In automated production lines, robotic systems, and engineering machinery, pneumatic solenoid valves play a vital role. Its design usually takes into account durability and sealing to ensure stable performance under high-frequency operation, effectively improving the working efficiency and reliability of the entire pneumatic system.

Air solenoid valve

Air solenoid valve can be regarded as a specific manifestation of pneumatic solenoid valve in specific application scenarios, which is mainly aimed at the control of air medium. Many air control systems, such as air conditioning equipment, air purifiers and conveying systems, use specially designed air solenoid valves.
This type of valve body design not only ensures fast opening and closing action, but also pays attention to noise control and energy consumption optimization during gas circulation. Thanks to its fine flow regulation function, the air solenoid valve can not only provide precise control, but also effectively avoid system vibration and wear caused by gas impact, thereby extending the service life of the equipment.

Application fields and technical prospects

Whether in industrial automation, robot control, production line equipment, or in the field of air conditioning and environmental control in life, solenoid valves have shown an irreplaceable role.
System control: The flexible switching function of the three-way solenoid valve makes it shine in the construction of reset, reversing and circulation control systems.
Energy efficiency optimization: The high responsiveness and sealing of pneumatic and air solenoid valves provide technical support for system energy saving and consumption reduction, and the characteristics of low energy consumption and high efficiency opening and closing regulation also make this type of equipment more widely used in the future.

As a key component in the automation control system, solenoid valves are of various types and have complete functions. Whether it is the application of three-way solenoid valves in complex switching control, or the precise regulation of pneumatic solenoid valves and air solenoid valves in compressed air systems, they all demonstrate the continuous pursuit of precise control and stable performance in modern industry.

Solenoid Valve Multi-Scenario Application And Development Trend

Solenoid valves play an extremely important role. We will analyze solenoid valve technology from principle, design, application to maintenance, and focus on specific applications in pneumatic, hydraulic and irrigation fields.

Pneumatic application: Features and advantages of Pneumatic Solenoid Valve
In pneumatic systems, pneumatic solenoid valves are mainly responsible for controlling the flow and pressure regulation of gases. This type of valve usually has the advantages of fast response speed, good sealing performance and long service life, and is suitable for automated production lines and micro pneumatic systems.

Fast response: suitable for high-frequency switch control.

High reliability: able to work stably in a variety of environments.

Easy installation: easy to integrate into existing automation control systems.

Hydraulic system: Technical analysis of Hydraulic Solenoid Valve
Compared with pneumatic systems, hydraulic systems require solenoid valves to accurately control the flow and direction of high-pressure liquids. Hydraulic solenoid valves are designed to meet large flow and high pressure conditions. It usually adopts a more robust structure and sealing technology to ensure safety and stability in complex hydraulic environments.

High-pressure seal: ensures no leakage during high-load operation.

Strong wear resistance: suitable for long-term, high-load operation.

Precise control: realize efficient conversion of fluid flow and hydraulic pressure.

Innovation in the agricultural field: Application practice of Irrigation Solenoid Valve
In modern agriculture, water-saving irrigation systems have gradually become an important means to improve agricultural production efficiency. Irrigation solenoid valve is widely used because it can accurately open and close the water source in the irrigation system.

Effective water saving: realize automatic and timed irrigation to avoid water waste.

Easy maintenance: compact structure design, easy daily maintenance.

Intelligent control: linked with sensors, adjust irrigation volume in real time according to soil moisture.

Solenoid valve technology is developing towards higher efficiency, longer life and smarter direction. In the future, with the maturity of the Internet of Things and intelligent control technology, various types of solenoid valves will realize advanced functions such as remote monitoring and adaptive adjustment. Whether in industrial automation or agricultural intelligent irrigation, technological progress will drive the improvement of the overall performance of the system.

COVNA three-clamp sanitary food-grade electric ball valve

As the food processing, pharmaceutical and water treatment industries continue to improve their hygiene standards and quality requirements, the industrial valve market has an increasingly urgent need for products with high reliability, excellent sealing and easy cleaning and maintenance.

COVNA HK60-Q-W electric ball valve adopts advanced design concepts and is designed for food-grade and sanitary environments. Based on a compact structural design and combined with a three-clamp quick connection method, this product achieves efficient disassembly and cleaning, and is an ideal choice for media control such as food, dairy products, and purified water.

Design and material advantages

1. High-quality stainless steel structure
Ensure that the product can maintain excellent performance even in harsh environments. The use of 304 or 316 stainless steel as the valve body material not only ensures corrosion resistance, but also extends service life.

2. Sanitary and safe three-clamp connection
Adopting the internationally accepted three-clamp quick connection method, the product is not only easy to disassemble and clean, but also effectively reduces the risk of cross contamination.

3. Flexible control mode and diverse voltage selection
Not only supports standard on/off control, but also can realize modulating operation, and its rotation control stroke is 90 degrees (quarter turn). The product provides a variety of voltage options, including DC 12V, 24V and AC 24V, 110V, 220V, 380V, etc., to further adapt to the working environment of various control systems.

Technical parameters and application areas

Valve size and pressure range

The product covers a range from 1/2 inch to 4 inches in size, and the working pressure is usually between 1.6 and 6.4MPa, which can meet the application requirements from low pressure to high pressure environment.

Wide range of applicable media
In addition to food, dairy products and drinking water, the valve is also suitable for air, pure water and even other corrosive or high-viscosity fluids, showing extremely high versatility and reliability .

COVNA can also customize materials and laser engrave corporate LOGO according to customer needs to provide customers with personalized solutions.

COVNA adopts a strict quality management system in the production process, and through precision testing and multiple pressure and air tightness tests, ensures that the products meet or even exceed the requirements of international standards such as GB, ANSI and API 598. With a 99.8% product qualification rate and a 5-year quality assurance, HK60-Q-W has won wide recognition and trust in the market.

COVNA HK60-Q-3PS Series Electric Actuator Ball Valve - Intelligent and Efficient

COVNA's HK60-Q-3PS series electric actuator ball valve adopts advanced electric control technology and high-quality stainless steel structure, providing stable and reliable solutions for industrial automation and fluid control. This series of products, with its compact three-piece design and female threaded connection, makes installation and maintenance more convenient, while ensuring excellent performance in high pressure and complex media environments.

Product Features

Intelligent control: supports standard on/off control and 4-20mA, 0-10VDC adjustment mode to achieve precise flow regulation, meeting a variety of needs from simple switching to fine control.

Reliable sealing: The default PTFE seat ring design is combined with excellent corrosion-resistant stainless steel (such as 304/316) material to ensure long-term sealing and stable operation of the valve body in a variety of media (such as water, oil, gas, corrosive liquids).

Multiple voltage options: 12V, 24V DC and 24V, 110V, 220V, 380V AC and other voltages are available to adapt to different industrial environments, providing users with flexible configuration possibilities.

Convenient installation: Female threaded connection design (minimum 1/4 inch) and modular three-piece structure greatly simplify on-site installation and subsequent maintenance.

Technical parameters

The HK60-Q-3PS series has a variety of technical specifications:

Caliber range: from 1/2 inch to 4 inches, which can be selected according to actual working conditions.

Working pressure: 10bar, 16bar, 25bar, 40bar to 64bar are available to meet high-pressure operation requirements.

Temperature range: Suitable for working conditions from low temperature to a maximum of 180°C.

Torque output: ranging from 50Nm to 4000Nm, ensuring fast response and precise control in various applications.

In the future, with the continuous upgrading of industrial automation, intelligent manufacturing, energy conservation and environmental protection, this ball valve will surely demonstrate its excellent performance in more fields, provide users with more economical, efficient and safe control solutions, and promote the entire industry to achieve a higher level of technological development and application innovation.

HK60-D-C Series 4-inch Electric Butterfly Valve - Intelligent Fluid Control Model

In the field of industrial automation and fluid control, the requirements for valves are increasing day by day. Whether it is heating, ventilation and air conditioning (HVAC) systems, or flow regulation in water treatment and chemical processes, a control element with flexible operation, low energy consumption and high reliability is required.

Product Features and Advantages

The HK60-D-C Series Electric Butterfly Valve adopts advanced electric actuators, which not only supports standard on/off operation, but also can achieve precise control through a variety of adjustment signals such as 4-20mA or 0-10VDC. This flexible control method ensures that the valve remains stable and efficient between smooth switching, meeting different needs from simple switching to complex regulation occasions. The product adopts a quarter-turn full open or full closed design, and only 90° rotation is required to achieve command response, thereby greatly reducing the demand for operating torque, saving energy and extending the service life of the valve.

This series of valves adopts a wafer type installation structure, which is convenient for direct clamping between flanges, simplifying the installation process and system modification. For the valve body material, users can choose cast iron, ductile iron or even stainless steel (304 or 316) according to the working conditions; the sealing material has different options such as NBR, EPDM and VITON, ensuring the ideal use effect in a variety of media (such as air, water, oil, gas, etc.).

Technical parameters and intelligent performance

The HK60-D-C series 4-inch electric butterfly valve has a wide range of sizes and pressures. Conventional diameters are available from 2 inches to 24 inches, while the 4-inch version has the advantages of both standardization and customization. Its design focuses on low-torque operation, which greatly improves the efficiency of fluid passage and reduces energy waste caused by turbulence and pressure loss. Equipped with a high-precision feedback signal system, the valve can quickly and accurately adjust to the set position after receiving the control signal, and still maintain the "last position" in the case of power failure, ensuring the continuous and stable operation of the system.

In terms of intelligence, the HK60-D-C series not only supports standard electrical signal control, but also can achieve more detailed flow regulation by modulating signals. Combined with fieldbus (such as MODBUS, PROFIBUS, etc.) and remote monitoring technology, the valve can achieve intelligent diagnosis and real-time data feedback, providing strong support for system automation and industrial Internet.

This multi-field applicability not only reflects COVNA's profound foundation in product research and development, but also provides industrial users with a variety of practical control solutions, promoting the continuous development of industrial automation and energy conservation and environmental protection.

We sincerely invite you to participate in WATERTECH China 2025

Dear industry colleagues, partners and guests:

We sincerely invite you to participate in WATERTECH China 2025, a highly anticipated water treatment technology exhibition in the industry. As a leading industrial automation company, Covna Industrial Automation Co., Ltd. will showcase innovative water treatment solutions and automation technologies at this exhibition.

Exhibition name: WATERTECH China 2025

Exhibition date: June 3-6, 2025

Exhibition location: National Exhibition and Convention Center (NECC), Shanghai, China

Booth number: Hall 7.1H, Booth 745

This exhibition will bring together industry elites to discuss the latest technologies, market trends and cooperation opportunities. We look forward to communicating with you and jointly promoting the development of the industry.