Stainless Steel Ball Valve introduction WCB ball valve characteristics Steel Ball Valve structure

Ball valve overview: Ball valve (ball valve), the opening and closing parts (ball) driven by the valve stem, and around the ball valve axis for rotary movement of the valve can also be used for fluid regulation and control, the hard seal V-ball valve v-core and hardfacing carbide metal seat between the strong shear force, especially suitable for containing fiber small solid material and other media And ball valve in the pipeline is not only more connected to the confluence of flexible control medium distribution and flow switch, at the same time also can close any channel and make the other two This valve shall generally be installed in the pipeline ball valve according to the drive mode can be divided into: pneumatic ball valves, electric ball valves, manual ball valve drive mode: manual electric pneumatic hydraulic Application: food, chemical, petroleum and electric power, etc.

Working principle: stem drives the ball valve to rotate.

Ball valve product introduction: Ball valve (ball valve) was born in the 1950s, with the rapid development of science and technology, production process and product structure of continuous improvement, in just 40 years, has rapidly developed into a major valve in the western industrial developed countries, the use of ball valve is rising year by year In Our country, ball valve is widely used in petroleum refining pipeline chemical paper pharmaceutical water conservancy power municipal steel and other industries, plays a pivotal role in the national economy it has 90 degrees of rotation action, the cock body is a sphere, a circular through hole or channel through its axis ball valve is mainly used to cut off in the pipeline Distribution and change the flow direction of the medium, it only needs to rotate 90 degrees of operation and a small torque can be closed tight ball valve suitable for switch off valve use, V-ball valve In addition to the pipe parameters, special attention should be paid to the environmental conditions of the use of the electric valve. Because the electric device in the electric valve is a mechanical and electrical equipment, its use state is greatly affected by its use environment.

Ball valve features: a wear-resistant; Because the valve core of hard sealing steel ball valve is alloy steel spray welding, sealing ring is alloy steel surfacing welding, so hard sealing ball valve in the switch will not produce too much wear (its hardness coefficient is 65-70): two good sealing performance; Because the sealing of hard sealing ball valve is manually grinding, until the spool and sealing ring can be used completely, so his sealing performance is reliable three switch light; Because the bottom of the sealing ring of the hard sealing ball valve adopts the spring to make the sealing ring and the spool tightly held together, so the external force exceeds the spring's preload when the switch is very light four long service life: has been widely used in the petrochemical industry, power generation, paper making, atomic energy, aviation rockets and other departments, as well as People's Daily life

Pneumatic Stainless Steel ball valve structure is simple and compact, reliable sealing, convenient maintenance, sealing surface and spherical surface often in closed state, not easy to be medium erosion, easy operation and maintenance, suitable for water solvent acid and natural gas and other general working medium, mainly used for truncating or connecting the medium in the pipeline, can also be used for fluid regulation and control Pneumatic ball valve compared with other types of valves, with angular stroke output torque, open quickly stable and reliable, widely applicable, and some of the following advantages: 1)thrust bearings reduce stem friction torque, can make the valve stem long smooth and flexible operation. 

2） anti-static function: set the spring between the sphere valve rod body, will be generated in the process of the switch of the electrostatic export.                             3) due to materials such as PTFE has good self-lubrication, with ball friction loss is small, so the pneumatic ball valve of long service life.

4 )Fluid resistance small, pneumatic ball valve is in the classification of all valves fluid resistance small, even the pneumatic ball valve, reducing the fluid resistance is small.

5) Stem seal reliable: due to the valve stem rotational motion and not only do the lifting movement, the valve stem packing seal is not easy to damage, and sealing ability with medium pressure increases with the increase in.

6) Seat sealing performance is good: the sealing ring made of PTFE and other elastic materials, the structure is easy to seal, and the valve sealing capacity of pneumatic ball valve increases with the increase of medium pressure.

7) fluid resistance is small, full diameter ball valve basically no flow resistance.

8) simple structure, small size, light weight.

9) Tight and reliable. It has two sealing surface, and the sealing surface of the ball valve material is widely used in a variety of plastics, good sealing, can achieve complete sealing. It has also been widely used in vacuum systems.

10) easy to operate, open and close quickly, from fully open to fully closed as long as the rotation of 90°, easy to remote control.

11) convenient maintenance, ball valve structure is simple, sealing ring is generally active, disassembly and replacement are more convenient.

12) When fully open or fully closed, the sealing surface of the ball and seat is isolated from the medium. When the medium passes, it will not cause the erosion of the sealing surface of the valve.

13)wide range of application, diameter from a few millimeters, to a few meters, from high vacuum to high pressure can be applied.

14) because the ball valve in the process of opening and closing wipe, so can be used with suspended solid particles in the medium.

15)High processing accuracy, high cost, not suitable for use in high temperature, such as impurities in the pipeline, easy to be blocked by impurities, resulting in the valve can not be opened.

Ball valve structure: Sealing is good, but all spheres of work under medium load to export sealing ring, so should consider to seal material can withstand the working load of sphere medium, under high pressure shock, sphere migration may occur In this structure, is generally used in low pressure ball valve ball valve ball is fixed, does not produce mobile after compression.

Fixed ball valve with floating seat, by the medium pressure, seat movement, so that the sealing ring pressed on the ball, to ensure that the seal is usually equipped with bearings on the upper and lower axis with the ball, operation torque is small, suitable for high pressure and large caliber valves. In order to reduce the operating torque of ball valve and increase the reliability of the seal, and the emergence of the oil seal ball valve, both in the sealing surface between the pressure injection of special lubricating oil, to form a layer of oil film, that is, to enhance the sealing, and reduce the operating torque, more suitable for high pressure large caliber ball valve.

Electric ball valve structure: Electric ball valve structure is only composed of a few parts, data consumption; Small size, light weight, small installation size electric WCB ball valve structure diagram, small driving torque, pressure regulating valve, easy to operate, agile, only need to rotate 90° can quickly open and close; And also has good flow regulation and sealing characteristics, in large and medium caliber, medium and low pressure application category, electric ball valve is the leading valve situation.

When the electric ball valve is in a complete open position, the thickness of the butterfly plate is the resistance of the medium flowing through the valve body, so the pressure drop through the valve is very small, so it has good flow control characteristics. Electric ball valve has two sealing types: elastic seal and metal seal. Elastic seal valve, sealing ring can be mounted on the valve body or attached to the disc periphery. The valve with metal seal is generally longer than the valve with elastic seal, but it is difficult to complete the seal. Metal seal can adapt to higher working temperature, elastic seal has the disadvantage of temperature limitation.

If the request electric ball valve as flow control use, it is important to accurately choose the size and type of the valve. The construction principle of electric ball valve is especially suitable for the manufacture of large caliber valves. Electric ball valves are not only widely used in petroleum, gas, chemical, water treatment and other general industries, but also used in the cooling water system of thermal power stations. Commonly used electric ball valve has two kinds of wafer electric ball valve and flange electric ball valve.

Wafer type electric ball valve is connected with a double head bolt between the two pipe flanges, flanged electric ball valve is a valve with flange, with bolts on both ends of the valve flange on the pipeline flange. Valve strength performance refers to the valve subjected to medium pressure. The valve is subjected to internal pressure of mechanical products, so it must have enough strength and stiffness, in order to ensure long-term use without cracking or deformation. Pneumatic ball valve is composed of ball valve pneumatic actuator, pneumatic actuator is divided into double acting pneumatic actuator and single acting pneumatic actuator, through the solenoid valve control, ball valve switch action. Pneumatic ball valve can realize intelligent control, quickly open or close the pipeline, can effectively control and manage the pipe network.