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Stainless steel globe valve
尝辞肠补迟颈辞苍：Home > Stainless steel globe valve
Internal thread cut-off valve body structure of a straight-through, DC and right-angle type. Straight-through type is the most common structure, but the resistance of the largest fluid. DC-type fluid resistance is small, mostly for solid particles or viscous fluid. Right-angle valve body forging, more suitable for small through the high pressure of the globe valve.
When the media from the valve thread cut valve below the valve into the valve, the operating force to overcome the resistance is the stem and packing friction and the pressure generated by the medium of the thrust, the valve off the force than the valve force , So the diameter of the stem to be large, or it will occur stem top bend of the fault.
Internal thread cut-off valve is a mandatory sealed valve, so the valve is closed, the valve must be applied pressure to force the sealing surface is not leaking. From the self-sealing valve appears, the internal thread, the flange of the valve flow to the valve above the valve into the valve chamber, then the pressure in the medium under the force off the valve is small, and open the valve force, valve The diameter of the rod may be correspondingly reduced. At the same time, the role of the media, this form of the valve is more stringent. China's valve "three to" has provided that the flow of cut-off valve, all top-down. This type of valve in the pipeline should generally be installed horizontally.
When the internal thread cut-off valve is opened, the valve opening height, for the nominal diameter of 25% to 30%, the flow has reached the maximum, said the valve has reached full open position. So cut-off valve fully open position, the valve should be determined by the stroke.
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