Home News Content

Structure Of Different Types Of Ball Valve

Aug 15, 2017

     Analysis of the structural characteristics of the full welding ball valve, a total of 6 points, as follows: Fully welded ball valve with advanced valve seat: Poly years ball valve manufacturing experience and design of the valve seat, low friction coefficient, small operating torque, a variety of valve seat materials, a wide range of adaptation. Full-welded ball valve's valve stem anti-flying structure: In the lower part of the stem set the steps, from the body inside the valve stem, to prevent the stem from flying out. Full-welded ball valve anti-static function: In the sphere and valve body or stem between the setting of Anti-Static Spring, the switch action process produced by electrostatic export.Ball Valve
    Full-welded ball valve fire-resistant structure: Advanced fire-resistant design, after the fire, each leakage part of the design into a flexible graphite filler or stainless steel clip graphite, to meet fire resistance requirements. Full-welded ball valve handle operation: The use of flat head stem, and the connection of the handle will not be dislocation, thus ensuring that the handle indicated the switch state and valve consistent. To prevent the valve switch from being mistakenly operated. In the switch fully open, the full off position is provided with a locking hole to ensure that the valve is in the correct position. The whole welding ball valve adopts the most advanced support plate structure at home and abroad, improves the service life of the valve, reduces the operating torque of the valve, and greatly prolongs the service life of the valve.Ball Valve
    Because the sealing parts of the soft sealed ball valve are truncated and connected, regulated and distributed, separated and mixed medium, the sealing surface is often corroded, eroded, worn and easily damaged by the medium. The cause of the sealing surface damage in the soft sealed ball valve of forged steel can be summed up as follows: soft sealed ball valve sealing surface processing quality is not good, mainly manifested in the sealing surface has cracks, pores and ballast, and other defects, is due to surfacing and heat treatment of improper selection and surfacing and heat treatment process caused by bad operation, sealing surface hardness is too high or too low, is due to improper selection or thermal treatment, the sealing surface hardness unevenness, corrosion resistance, mainly because in the surfacing process will be the bottom metal blown to the top, The alloy composition of the sealing surface is diluted. Of course, there are design problems.Ball Valve
    Soft sealed ball valve sealing surface, improper selection and bad operation caused by damage. The main performance is not in accordance with the operating conditions of the selection of valves, the truncation valve when the throttle valve is used, resulting in the shutdown than the pressure is too large and close too fast or closed, so that the sealing surface is erosion and wear. Soft sealed ball valve sealing surface, installation and maintenance of poor results in the sealing surface work is not normal, valve sick operation, premature damage to the sealing surface. Soft sealed ball valve sealing surface mechanical damage, closed cover in the opening and closing of our will produce abrasions, scratches, injuries and other damage. Between the two sealing surfaces, under the action of high temperature and high pressure, atoms penetrate into each other, resulting in adhesion phenomenon. When two sealing surfaces move with each other, the adhesion is easily torn. The higher the surface roughness of the sealing surface, the more easily this phenomenon will occur. Valve in the process of closure, the disc in the process of the back seat will touch and squeeze the sealing surface, so that the seal of local wear or the formation of indentation.Ball Valve