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Globe valve
Classification:
Valve
Key words:
Hengjia Pipeline
Valve
Product Details
Globe valve, also known as 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 the valve from below the disc, the resistance that the operating force needs to overcome is the friction between 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. According to the connection method is divided into three kinds: flange connection, thread connection, welding connection. From the self-sealing valve after the emergence of the cut-off valve, the flow direction of the medium into the valve cavity from the top of the valve, then under the action of the medium pressure, the force of the valve is small, and the force of 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 valve is also more tight. China's valve "three to" has stipulated that the flow of the valve, all use top-down. When the stop valve is opened, the opening height of the 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 fully open position of the stop valve should be determined by the stroke of the valve flap.
Point of stop valve:
1. Simple structure, convenient manufacture and maintenance.
2. The working stroke is small and the opening and closing time is short.
3. Good sealing performance, small friction force between sealing surfaces and long service life.
4. The structure of the cut-off valve body is straight-through, straight-through and right-angle. The straight-through type is the most common structure, but its fluid resistance is the greatest. Direct flow fluid resistance is small, more for containing solid particles or high viscosity of the fluid. Right-angle valve body is mostly forged, which is suitable for valves with small passage and high pressure.
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Contact Information
Address: Longtan Industrial Zone, Yanshan County, Cangzhou City, Hebei Province
Cangzhou Hengjia Pipeline Co., Ltd.
Cangzhou Hengjia Pipeline Co., Ltd. is located in Yanshan, Hebei Province, which is the sales branch of Hebei Longrun Pipeline Group Co., Ltd.
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