Electric ball valve standard and electric ball valve working principle

The electric ball valve standard GB/T21465-2008 "valve terminology" is defined as: the opening and closing member (sphere) is driven by the valve stem and rotates around the axis of the valve stem. It is mainly used to cut off or turn on the medium in the pipeline, and can also be used for the regulation and control of the fluid. The hard seal V-shaped ball valve has a strong shear between the V-shaped core and the metal seat of the hardfacing alloy. Shear force, especially suitable for media containing fibers, tiny solid particles. The electric ball valve is divided into an electric flange ball valve, an electric pair ball valve, an electric welding ball valve, and a electric wire ball valve. According to the sealing form, it is also divided into a soft-sealed electric ball valve and a hard-sealed electric ball valve.

The electric ball valve is simple in structure and consists of only a few parts. The data consumption is low. The volume is small, the weight is light, the installation size is small, the driving torque is small, and the pressure regulating valve is easy to operate and agile. It can be quickly started by rotating 90°. Closed; and also has good flow regulation and closed sealing characteristics, electric ball valve is the dominant valve situation in the application of large and medium diameter, medium and low pressure. When the electric ball valve is in the fully open position, the thickness of the disc is the only resistance when the medium flows through the valve body. Therefore, the pressure drop generated by the valve is small, so it has a good flow control feature. The electric ball valve has two sealing types: a spring seal and a metal seal. Elastomeric sealing valve, the sealing ring can be mounted on the valve body or attached to the periphery of the disc. Valves with metal seals generally have a longer life than elastomer-sealed valves, but it is difficult to achieve a complete seal. Metal seals can accommodate higher operating temperatures, while elastomeric seals have the disadvantage of being temperature limited. If the electric ball valve is requested to be used as a flow control, it is important to accurately select the size and type of the valve. The construction principle of the electric ball valve is particularly suitable for the manufacture of large diameter valves. Electric ball valves are not only widely used in general industries such as petroleum, gas, chemical, and water disposal, but also used in cooling water systems of thermal power stations. Commonly used electric ball valves are two types of clip-on electric ball valves and flange type electric ball valves. The clip type electric ball valve uses a stud bolt to connect the valve between the two pipe flanges. The flange type electric ball valve has a flange on the valve, and the flanges on both ends of the valve are connected to the pipe flange by bolts. The strength performance of the valve refers to the ability of the valve to be subjected to the pressure of the medium. Valves are mechanical products that are subject to internal pressure and must be of sufficient strength and rigidity to ensure long-term use without cracking or deformation.

Electric ball valve is a kind of pipeline pressure component for industrial automation process control. It is usually used for remote opening and closing (turning on and off media) control of pipeline media.

feature
With integrated structure, the single-phase power supply AC220V and DC power supply 24VDC can control the operation.

Small size, light weight, reliable performance, simple matching, and large circulation capacity. range
Air, steam, water, gas, petroleum and petrochemicals, corrosive media.

Electric ball valve; V-type electric ball valve is a kind of rotary ball valve with metal valve or metal-to-PTFE sealing fit. The electric ball valve combines the optimal control characteristics of ball valve and butterfly valve, which can be used as control adjustment. The valve can also be used as a shut-off shut-off valve. Its main features are:

(1) The integral valve body without any pipe joints, so it is not affected by the pipe or bolt stress, and since the valve body does not have any pipe joints, the pressure-resistant casing is not affected by the pressure "mutation";

(2) The electric ball valve has a V-shaped valve body, which can ensure the accuracy of the control over the entire measuring range even in the case of small flow or high viscosity medium;

(3) The anti-leakage and durable valve seat of the electric ball valve is lined with a stainless steel inner core PTFE cup or O-ring at its outer diameter. The valve seat is made of tungsten-cobalt carbide with a large cross section and passes through an alloy. The corrugated spring further enhances the structure of the valve seat;

(4) When the electric ball valve is closed, the wedge-shaped shearing action is formed between the V-notch and the electric ball valve seat, and the self-cleaning function and the core are prevented from being stuck. The electric ball valve is particularly suitable for pipeline fouling or Contains fiber and particulate solids.