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What does the globe valve do

Posted by Bundor valve
What does the globe valve do?The main function of globe valve in pipeline is to cut off or connect the fluid. The regulating flow rate of globe valve is better than that of gate valve. However, globe valve cannot be used to regulate pressure and flow rate for a long time.
globe valve
Globe valve can be used for water, steam, air and other pipelines, but should not be used for high viscosity, easy to coking, easy to precipitate medium pipelines, so as not to damage the sealing surface.

Globe valves are forced-seal valves, so when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak.When the medium from the lower valve disc into valve 6, the operating force to overcome the resistance, is the friction force of the valve stem and packing and the thrust generated by the pressure of the medium, the force of the valve is larger than the force of the valve, so the diameter of the valve stem to be large, otherwise the valve stem bending fault will occur.In recent years, from the appearance of the sealed valve, the flow of the globe valve media from the upper disc into the valve chamber, then under the action of media pressure, the force to close the valve is small, and the force to open the valve is large, the diameter of the valve stem can be reduced accordingly.At the same time, under the action of the medium, this form of the valve is more rigorous.China's valve "three to" has been stipulated, the flow of the globe valve, all use from top to bottom.

When the globe valve is opened, the opening height of the disc is 25%~30% of the nominal diameter, and the flow has reached the maximum, indicating that the valve has reached the full open position.So the full open position of the globe valve should be determined by the stroke of the disc.