Globe valve is to use the valve rod drives the valve head, which changes the distance between the valve plate and valve seat to open/close the control valve, globe Industrial Valves is the most widely used in chemical production of truncated class valves. Globe valves in the actual production is mainly used for water, steam, compressed air and so on line control, but should not be applied to material viscosity easy crystallization. Globe valve structure is relatively complex, but the actual operation convenient save Labour, in the flow adjustment and truncate the channel has good performance, water hammer phenomenon seldom appears slow opening and closing. Compact structure of the cut-off valve, appearance has the obvious characteristics of the valve at the top of the handwheel and stem, with thread and packing seal in the middle. Cut-off valve in when used to determine the Industrial Valves opening and closing state, the main way is to observe the stem above the height of the valve cover, in order to control the operation of the valve. Part of the stem and bonnet joint, there may be a gap prone to medium leakage, this can be addressed by packing seal. Small cut-off valve stem threads in the body, so in the use of more contact with the medium for a long time, easy to corrosion medium. So, in order to prevent the globe valve's service life is short, fairy butterfly valve door, chief engineer even the right to consider the installation of cut-off valve to the direction of the reference fluid, keep the line of low into the higher, which is from the bottom up through the seat. The purpose of this installation is to reduce the body fluid resistance reducing valve opening and closing force, at the same time also can maintain the valve closing valve stem and gland is not contact with the media, to reduce damage and leaks. Cut-off Industrial Valves when installed, should pay attention to the following three points: 1, the cut-off valve should be leak inspection before open, to determine whether the valve without leakage defect, stuffing box is leaking defects. 2, the cut-off valve stem operation such as can't do, hand of choose and employ persons can use special F wrench to replace, but in the case of F wrench is still unable to open, do not use the longer wrench forced open and close, in order to avoid damage to the valve or even the occurrence of safety accidents. 3, cut-off valve when applied in the medium pressure steam pipeline, condensate ruled out in the open before, after preheating, steam pipe preheater pressure in a 0. 2 to 0. 3 mpa, the aim is to avoid sudden changes in temperature and pressure caused by the seal is damaged, after determine the stable pressure can be transferred to the required level. In this paper, the keyword search: more products information
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