Stainless steel globe valve is a kind of stop valve, 301 tend to have higher demands on the valve body material. 304. 316 a few materials are widely used in the chemical industry, such as Marine, medical, food machinery and other industries. Stainless steel valve can be divided into manual stainless steel globe valve, pneumatic Industrial Valves, stainless steel electric stainless steel globe valve. Globe valve ( 截止阀、截止阀) The opening and closing is plug valve, sealing surfaces appear flat or cone, disc make linear movement along the centerline of fluid. Stem form of exercise, ( Common name: non-rising stem) , also have lift rotating bar type, ( Common name: Ming) Globe valve used throughout close tu, don't allow to adjust and throttling. Cut-off valve belongs to compulsory sealed Industrial Valves, the valve is closed, must be pressure on the disc, to force a sealing surface does not leak. When the medium from the disc below to the valve, the operating force to overcome resistance, is stem and packing friction with the thrust produced by medium pressure, close the valve force stronger than open the valve, so it's bigger, the diameter of the stem or stem top bending failure happens. In recent years, from the seal valve, cut-off valve is replaced by the disc above the medium flow direction into the valve cavity, in the medium pressure at this moment, close the valve of the force is small, and the strength of the valve, the valve stem diameter can be reduced accordingly. At the same time, in the role of media, this kind of valve is tight. Our valve & quot; Order to & quot; Has rules, the flow of cut-off valve, shall be applied. This valve should be installed to level the cut-off valve opens, the opening of the disc height, is 25% ~ 30% of nominal diameter, flow rate has reached * big, said valve to full open position. So stop Industrial Valves fully open position, should be determined by disc's schedule. Cut-off valve installation and maintenance should be paid attention to the following: 1, hand wheel, lever operation stop valve can be installed in any position. 2, hand wheel, lever and gyration bodies, does not allow for lifting. 3, the flow of medium should be consistent with the direction arrow shown in the body. 4, regular inspection seal. Globe valve on their medium pipeline plays a cut off and the important role of throttle, cut-off valve, as a kind of extremely important truncated class valves, which exert torque on the valve stem seal, valve stem in axial direction to the pressure on the disc, the valve sealing surface and the valve seat sealing surface fit closely, prevent leakage of medium along the gaps between the sealing surface. Globe valve seal deputy is composed of valve sealing surface and the valve seat sealing surface, the center line of the stem drive disc along the seat of the vertical movement. Cut-off valve opening and closing process and height is small, easy to the adjustment of the flow, and convenient manufacture and maintenance, wide pressure scope. With another kind of commonly used in industrial production of truncation compared class to make the valve, in terms of structure, cut-off valve is simpler than the former, easy manufacture and maintenance. In service life, cut-off valve sealing surface is not easy to wear and scratches, in the process of opening and closing the valve disc with no relative sliding between _ seat sealing surface, thus less wear and scratches on the sealing surface, so to improve the service life of the seal globe valves in the process of the full close disc stroke is small, its high alarm valve is relatively less. Cut-off valve of the disadvantage is that large and difficult to realize the rapid opening and closing, opening and closing torque due to the valve body port is more twists and turns, fluid flow resistance is big, fluid power in line loss is bigger. The article by all standing valve ( Technology department) Editing and publishing
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