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1. When the angle globe valve is opened, when the opening height of the valve disc is 25% ~ 30% of the nominal diameter, the flow has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the full open position of the stop valve shall be determined by the str
Angle globe valve is a forced sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters valve VI from below the valve disc, the resistance to be overcome by the operating force is the friction force between
Usually domestic, we use stainless steel flange, it is the common lathe to produce the flange, there will be some positive and negative error. Therefore, people are called theoretical weight, at present, the domestic general use of theoretical weight as the flange standard. In addition, we can also
The carbon steel flange seal is through the pretension force of the bolts, causes the gasket and the flange seal surface to produce the sufficient pressure, the gasket surface produces the distortion enough to fill the flange seal surface the microscopic irregularity, achieves the goal which does no
Because of the hydraulic bulging process of stainless steel tee, the equipment tonnage is large, which is mainly used in the manufacture of standard wall thickness stainless steel tee with less than 400. Our country’s transportation facility is the country “Eleven-Five” continues the big investment
The elbow formed by steel hot pressing or forging process is stainless steel elbow. The stainless steel elbow is butt welded with steel pipe through elbow, and two workpieces are welded together along the whole end face through resistance heating. There are usually two methods of resistance butt wel
