Here are the basic knowledge of the
cast steel flanged ball valve.
The
ball valve is a type of valve with a ball as the opening and closing parts. With the rapid development of domestic processing technology, testing technology and intelligent control technology, as well as the continuous emergence of a variety of new sealing materials, ball valve products will be more and more widely used. At present, cast steel flanged ball valves are used in not only general industrial pipelines, but also coal-to-oil engineering, nuclear industry and aerospace industry pipelines.
The classification of ball valves
Ball valves have a variety of structural forms and specifications. New products and structures are still emerging. According to the characteristics and uses of cast steel flanged ball valves, ball valves can be divided into several types. Depending on the support mode, it can be classified into the floating ball valve and the fixed ball valve. The main feature of the floating ball valve is that the ball has no supporting shaft. The ball is supported by the valve seat at both ends of the inlet and outlet. The valve stem is connected to the ball. The ball of the valve is held by two seats and presents a floating state. The ball of the ball valve is connected with the upper and lower stem, or the ball is connected as a whole. The ball is welded to the upper and lower stem. On the bearing, the ball can rotate freely along the vertical axis of the valve channel, but it cannot move along the channel axis. Therefore, when a fixed cast steel flanged ball valve is being operated, all the force is exerted on the ball by the fluid pressure. In front of the valve, the pressure is transferred to the bearing and does not cause the valve to move backward. Therefore, the seat will not bear excessive pressure, which is more suitable for high-pressure, large channel and sphere structure classification. Ball valves can also be classified by installation mode.
The ball valve, also known as ultra-short and ultra-thin cast steel flanged ball valves, rotates the closing ball around the center line of the body to open and close the valve. When the medium pressure in the ball valve chamber exceeds the spring preload, the outlet seat exits to achieve the automatic pressure-releasing effect. After the pressure is released, the seat automatically resets. The cast steel flanged ball valve is suitable for water, solvent, acid, natural gas and other general working media. The ultra-short ball valve is also suitable for oxygen, hydrogen peroxide, methane, ethylene and other poor working conditions of the medium. They are widely used in various industries.
The model description of cast steel flange ball valves
The Italian ultra-thin clamped ball valve is a kind of ultra-short cast steel flanged ball valve, using imported technology for domestic design. The core channels are rectangular, V-shaped and O-shaped. Ultra-short ball valve products have the characteristics of compact structure, small size, light weight and easy installation. It can be widely used in petroleum, chemical industry, metallurgy, power station, light industry and other fields to automatically adjust or cut off oil, water, gas, pulp or fiber fluid.
High-pressure cast steel flanged ball valves
The high-pressure ball valve is mainly used for the circulation and cut-off of hydraulic, fluid, oil and gas pipelines. The high-pressure cast steel flanged ball valve has the characteristics of small flow resistance loss, reliable sealing performance, easy operation, delicate appearance and so on. This type of high-pressure cast steel flanged ball valve is mainly composed of the valve body, ball, stem, handle and sealing device. It is widely used in petroleum, LNG, natural gas, chemical, metallurgy, electric power, pharmaceutical, papermaking, food, energy and other industries.
