High quality stainless steel globe valve
Classification:
Release Time：2018-10-29
Stainless steel cut-off valve opening and closing parts is a plug-shaped valve, the sealing surface is flat or conical, the valve along the center line of the fluid for linear motion. The movement of the stem, there are lifting rod type (stem lifting, hand wheel does not lift), there are lifting rotating rod type (hand wheel and stem rotating lift, nut is located on the valve body). Stainless steel globe valve is only suitable for full opening and full closing, not allowed to adjust and throttle. Stainless steel cut-off valve is a forced seal valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface does not leak. When the medium enters from below the disc, the resistance that the operating force needs to overcome is the resistance of the valve stem and the packing.
Stainless steel cut-off valve opening and closing parts is a plug-shaped valve, the sealing surface is flat or conical, the valve along the center line of the fluid for linear motion. The movement of the stem, there are lifting rod type (stem lifting, hand wheel does not lift), there are lifting rotating rod type (hand wheel and stem rotating lift, nut is located on the valve body). Stainless steel globe valve is only suitable for full opening and full closing, not allowed to adjust and throttle.
Stainless steel cut-off valve is a forced seal valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface does not leak. When the medium enters from below the disc, the resistance that the operating force needs to overcome is the friction force of the valve stem and the packing and the thrust generated by the pressure of the medium. The force of closing the valve is greater than that of opening the valve, so the valve stem The diameter should be large, otherwise the failure of the stem top bending will occur. In recent years, after the emergence of self-sealing valves, the medium flow of the stainless steel globe valve is changed to enter the valve cavity from above the valve clack. At this time, under the action of medium pressure, the force of closing the valve is small, while the force of opening the valve is large, and the diameter of the valve stem can be reduced accordingly. At the same time, under the action of the medium, this form of valve is also more tight. China's valve "three to" has stipulated that the flow of stainless steel globe valve, all use top-down.
When the stainless steel stop valve is opened, the opening height of the valve flap and the flow rate have reached the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the stainless steel globe valve should be determined by the stroke of the valve flap.
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2026/02/28
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