We are very familiar with the stainless steel
ball valve. However, compared with some industrial field veterans, some industrial field novices are very strange to the stainless steel ball valve. The composition of a big machine is generally composed of many small screws, valves, ball valves and other small parts. We believe that many people know bolts and valves, but when it comes to ball valves, it is estimated that people do not know very much. Let's talk about stainless steel ball valves, the types of stainless steel ball valves and the relevant content of the principle of stainless steel ball valves.
First, we need to know how it works. Then, we can use it. The working principle of stainless steel flanged ball valves is that it can be blocked and unblocked by rotating the spool in the process of using. There is a particularly good aspect for stainless steel 304 ball valve. It is its light switch and small volume. It can be made with large calibers. Its sealing, structure, reliability, maintenance and other aspects are far better than that of stainless steel ball valves. The same type of valves is in a closed state. It is not easy to be eroded by the medium, so it is widely used in various industries.
What is the working principle of stainless steel ball valves?
The working principle of stainless steel ball valves is to make the valve unblocked or blocked by rotating the spool. The switch of ball valves is light in weight and small in volume. It can be made of ones with large diameter, reliable sealing, simple structure, convenient maintenance, sealing surface and spherical normally closed. It is not easy to be corroded through the medium, and it is widely used in various industries.
316L stainless steel ball valves and plug valves belong to the same kind of valves. Only the closed part is the ball. The ball rotates around the center line of the valve body to realize opening and closing. Stainless steel ball valves are mainly used to cut off, distribute and change the flow direction of pipe medium. The ball valve is widely used as a new valve. As ball valves generally only need to rotate the handle 90° to complete the full open or closed action, it is easy to achieve fast opening and closing. The opening and closing time of some structures is only 0.05-0.1s, so as to ensure the use in the test bench automation system. Fast opening and closing valve make sure no impact in operation.
There are many kinds of stainless steel ball valves. You can choose them based on their own needs and actual installation location. The following is the introduction of the classification of stainless steel ball valves. We hope to help you. No matter what types and models of ball valves you choose, the key point is that it can suit you.
The classifications of stainless steel ball valves
1. According to the structure, stainless steel ball valve class can be divided into floating ball valves, fixed ball valves and resilient ball valves.
Floating ball valves: The ball of the ball valve is floating. Under the action of medium pressure, the sphere will produce a certain displacement, pressing on the sealing surface of the outlet end to ensure the sealing of the outlet end. The floating ball valve structure is simple. The sealing performance is good, but the bearing load of the working medium of the ball all transfers to the export seal ring. Therefore, it is necessary to consider whether the sealing ring material can bear the working load of the ball.
Fixed ball valves: the ball valve is fixed. It does not move after pressure. Fixed ball valves have floating seats. When the medium is pressed, the seat moves so that the sealing ring is pressed on the sphere to ensure the seal. Bearings are usually mounted on the upper and lower shafts of the ball and operate with low torque. It is suitable for high pressure and large diameter valves. In order to reduce the operating torque of ball valves and increase the reliability of sealing, oil seal ball valves appeared. It injects special lubricant between the sealing surface, forms an oil film, enhances the sealing performance and reduces the operating torque, which is more suitable for high pressure large caliber ball valves.
Resilient ball valves: the ball of the ball valve is elastic. The ball and seat sealing ring are made of metal material. The sealing pressure is very large. The pressure of the medium itself cannot meet the sealing requirements, and external forces must be applied. The valve is suitable for high temperature and high pressure medium. An elastic sphere is an elastic groove cut at the lower end of the inner wall of the sphere to obtain elasticity. To close the aisle, use the stem wedge to inflate the ball and compress the seat seal. Loosen the wedge head before turning the ball, the ball will return to its original state, leaving a small gap between the ball and the seat, which can reduce the friction and operating torque of the sealing surface.
2. According to its channel position, ball valves can be divided into straight valves, three-way ball valves, and right angle valves. Three-way ball valves are T type and L type. The T type can connect three orthogonal pipes to each other and cut off a third channel, which can be split and merged. L type can only be connected to two orthogonal pipes, not a third pipe connected to each other at the same time. It only serves the function of distribution. Three-way ball valves are the integrated structure with four side seat sealing, less flange connection, high reliability and lightweight design. Tee ball core is divided into T type and L type with long service life, large circulation capacity and small resistance.
3. According to the function of points, ball valves can be divided into single-action ball valves and double-action ball valves. The single-acting type is characterized by the failure of the power source. The ball valve will be in the state of control system requirements.
4. According to its composition, ball valves can be divided into one-piece ball valves, two-piece ball valves and three-piece ball valves.
5. According to the material, ball valves can be divided into stainless steel ball valves (201, 301, 304, 304L, 316L), cast steel ball valves WCB, carbon steel ball valves, ductile iron ball valves, etc.
6. According to the driving mode, ball valves can be divided into electric ball valves, pneumatic ball valves, manual ball valves and hydraulic ball valves.
