Ball valve also a commonly used valve instrumentation, mainly used for cutting, distributing and changing the direction of medium flow devices, are widely used in petroleum refining, long-distance pipeline, chemical, paper, pharmaceutical, electric power, steel and other fields. What are the features of the ball valve? The following small series on the specific introduction of the four ball valve features, hope to help everyone.Ball Valve
Ball valve application: Ball valve in the pipeline is mainly used to cut, allocate and change the direction of the flow of the medium, it only needs to rotate 90 degrees of operation and very small rotation torque can be closed tight. Ball valve is most suitable for switch, cut-off valve use, V-type ball valve. In addition to the electric valve should pay attention to the piping parameters, should pay special attention to its use of environmental conditions, because the electric valve in the electric device is a mechanical and electrical equipment, its use of the state affected by its use of the environment is very large. Normally, the electric ball valve, butterfly valve in the following environment use to pay special attention.
The characteristics of ball valve: one; Because of the hard sealing ball valve core is alloy steel spray welding, sealing ring is alloy steel surfacing, so hard seal ball valve in the switch will not produce too much wear. (Its hardness coefficient is 65-70): two; the sealing performance is good, because the seal of the hard sealed ball valve is artificially milled until the spool is fully matched with the sealing ring. So his sealing performance is reliable. The switch is light; because the sealing ring of the hard sealing ball valve adopts spring to make the sealing ring and the spool tightly hold together, the switch is very light when the outside force exceeds the preload of the spring. Long service life: has been widely used in petroleum, chemical, power generation, papermaking, Atomic Energy, aviation, rockets and other departments, as well as people's daily life.Ball Valve
The ball valve has compact structure and reliable sealing, simple structure, easy maintenance, sealing surface and spherical surface often in closed state, not easily by the media erosion, easy to operate and repair, applicable to water, solvents, acids and natural gas, such as the general working medium, mainly used to truncate or connected to the pipeline medium, can also be used for fluid conditioning and control. The ball with circular pass hole is used as the headstock, the ball rotates with the stem to realize the valve of opening and closing action. The structure of the ball valve is similar to the plug valve, which is also referred to as a spherical plug valve. It consists of a sphere and a two-seat (seal ring) seal. The most commonly used material for the seat is PTFE plastic. In a variety of valves in the ball valve of the smallest fluid resistance, it has a quick switch, good sealing advantages, and thus has become the fastest development of a class of valves. It has a wide range of applications: working pressure from high vacuum to high-pressure (pressure has reached 40 MPa), operating temperature of -253~+150℃, the largest caliber has reached 3000 mm. The main drawback of the ball valve is that the working temperature is not high. People are developing carbon, graphite and other sealing materials to improve the use of the ball valve temperature. According to the principle of sealing structure, ball valve is divided into floating ball valve and fixed ball valve.Ball Valve