In today's highly automated industrial production environment, the precision of fluid control systems directly affects production efficiency, product quality, and the safety of the entire production process. From the extraction and refining of oil, to the synthesis of chemical products, to the transmission and distribution of electricity, and to the material handling in the metallurgical process, every link relies on precise control of fluid flow and pressure. Against this backdrop, the electric V-type ball valve, with its outstanding performance and wide applicability, has become an indispensable key component in many industrial fields. It not only enables high-precision flow control but also maintains long-term stable operation under harsh working conditions, thus finding widespread application in industries such as oil, chemical, power, and metallurgy.
The electric V-type ball valve is a type of rotary ball valve that combines the advantages of ball valves and butterfly valves. Its core component is the V-shaped notched spherical valve plate, which controls the flow of fluid by rotating along the sealing surface within a small opening range. This type of valve can function both as a control regulating valve to precisely regulate fluid flow and as a shut-off valve to completely cut off the fluid. It is mainly composed of electric actuators such as models YXR and PSQ, and the V-type ball valve, featuring a compact structure and reliable performance.
Next, let's take a detailed look at the structural features of the electric V-type ball valve, which are the key factors for its excellent performance in industrial applications.
The electric V-type ball valve features an integral valve body design without any pipe joints. This design ensures that the valve is not affected by pipe or bolt stress and also eliminates the risk of leakage that might be caused by pipe joints. Since the valve body has no pipe joints, its pressure-resistant shell is not subjected to "sudden pressure changes," greatly enhancing the valve's safety and reliability.
The V-type valve body is the core component of the electric V-type ball valve. It ensures precise control throughout the entire range of flow rates, even in cases of low flow or high-viscosity media. The V-shaped notched spherical valve plate not only increases the control ratio but also has a shearing effect on the sealing ring during throttling. This makes the valve particularly suitable for control systems requiring a large control ratio, as well as for controlling fibrous fluids and slurry-like fluids.
The seat is another important part of the electric V-type ball valve. It features a leak-proof and durable design, with a PTFE cup or O-ring seal with a stainless steel core at the outer diameter. The seat is made of tungsten-cobalt hard alloy with a larger cross-section, and its structure is further enhanced by an alloy bellows spring. When the valve is closed, a wedge-shaped shearing action occurs between the V-notch and the seat, which not only has a self-cleaning function but also prevents the ball core from sticking. This design is especially suitable for pipelines that are prone to scaling or freezing, or those containing fibrous and granular solids.
The actuator of the electric V-type ball valve can be configured with different models according to user requirements, such as electronic electric actuators like UNIC, PSQ, HQ, and DHL, or pneumatic piston actuators like GTX and AL. These actuators are characterized by their compact structure, small size, light weight, low resistance, and stable and reliable operation, meeting the needs of various users.
Electric V-type ball valves are widely used in industries such as oil, chemical, power, metallurgy, steel, papermaking, pharmaceuticals, food, textiles, and light industry. In the papermaking industry, they can be used to control the flow of pulp; in the sugar-making industry, they can regulate the conveyance of syrup; in the oil and chemical industries, they can precisely control the flow of various chemicals; and in the metallurgical industry, they can control the flow of high-temperature molten metals. In summary, electric V-type ball valves play an important role in various industrial process automatic control systems.
After understanding the many advantages and structural features of the electric V-type ball valve, we will now focus on the precautions during its installation process. Proper installation is a key step to ensure the normal operation of the valve and extend its service life. Therefore, when installing the electric V-type ball valve, the following points should be paid special attention to.
In a newly designed and installed control system, to ensure that the electric V-type ball valve can work normally at startup and ensure the safe operation of the system, the nameplate markings on the new valve should first be checked to see if they match the design requirements. The following items should also be tested: basic error limit, full stroke deviation, hysteresis, dead band, and leakage rate (in cases where strict requirements are needed). If a control valve in the original system has undergone major repairs, in addition to verifying the above items, the packing gland and connection areas of the old valve should also be checked for seal integrity.
Control valves are field instruments that require an ambient temperature range of -25 to 60°C and a relative humidity of ≤95%. If installed outdoors or in high-temperature environments, waterproofing and cooling measures should be taken. In locations with vibration sources, the valve should be kept away from the source of vibration or additional anti-vibration measures should be implemented.
Control valves should generally be installed vertically. In special cases, they can be installed at an angle. If the angle is large or the valve itself is too heavy, supports should be added to protect the valve. The pipeline where the control valve is installed should not be too high above the ground or floor. When the pipeline height exceeds 2 meters, a platform should be set up as much as possible to facilitate the operation of the handwheel and maintenance work.
Before installing the control valve, the pipeline should be cleaned to remove dirt and welding slag. After installation, to ensure that no impurities remain inside the valve, the valve should be cleaned again. This means that all valves should be opened when the medium is passed through to prevent impurities from getting stuck.
To ensure that the production process can continue in the event of a control valve failure or maintenance, a bypass pipeline should be added to the control valve.
The electrical installation of the electric V-type ball valve should be carried out in accordance with the relevant requirements for electrical equipment construction. If it is an explosion-proof product, it should be installed according to the relevant installation specifications. For example, if the on-site wire is an SBH type or other six-core or eight-core cable with an outer diameter of about Φ11.3mm, it should be used. During use and maintenance, it is strictly forbidden to power on and open the cover for maintenance or pry the explosion-proof surface in explosive places. At the same time, during disassembly and assembly, the explosion-proof surface should not be bumped or scratched, and after maintenance, it should be restored to the original explosion-proof requirement state.
After disassembling and repairing the reducer of the actuator, attention should be paid to lubricating with oil. Generally, low-speed motors should not be disassembled, washed, and lubricated. After assembly, the valve position should be checked to see if it matches the valve position opening indication.
Electric V-type ball valves have the following significant advantages:
Precise Control: The V-shaped notched spherical valve plate can precisely control fluid flow even at small openings, making it suitable for high-viscosity, suspension, pulp, and other unclean, fibrous media.
High Control Ratio: While increasing the control ratio, it has a shearing effect on the sealing ring, making it particularly suitable for control systems requiring a large control ratio.
Self-Cleaning Function: When the valve is closed, a wedge-shaped shearing action occurs between the V-notch and the seat, which has a self-cleaning function and prevents the ball core from sticking.
Compact Structure: It is directly connected to the actuator, featuring a compact structure, small size, light weight, low resistance, and stable and reliable operation.
Wide Application Range: It is widely used in industrial process automatic control systems in industries such as papermaking, sugar-making, oil, chemicals, and metallurgy.
In summary, the electric V-type ball valve is an outstanding industrial control valve with a wide range of applications. It can not only meet various complex industrial control requirements but also maintain stable and reliable performance in harsh working environments. Through proper installation and maintenance, the electric V-type ball valve will provide strong support for industrial production, ensuring the smooth progress of the production process and the stability of product quality.
