fluorine lining gate valve

How the globe valve works

by:Lianke Valve     2022-08-13
The working principle of the globe valve is an analogy. Assuming a water tank with a cover, the water enters from the bottom of the tank and flows out from the cylinder mouth. The working principle of the valve. If the cylinder head is removed by hand, it is equivalent to the working principle of the gate valve. Main standards: 1. Design standard: GB/T 122352, Connection standard: 1) Butt welding end BW: according to GB/T 122242 ) Flange end RF: according to JB79; GB/T 9113; HG205923, Valve inspection and test: GB/T 13927; JB/T 9092 adopts the following structure: rising rod bracket type bolted bonnet; internal pressure self-tightening bonnet Integral upper sealing seat is introduced in detail: the opening and closing parts of the globe valve are cylindrical discs, the sealing surface is flat or conical, and the disc moves linearly along the center line of the fluid. The movement form of the valve stem includes a lifting rod type (the valve stem rises and falls, and the handwheel does not rise and fall), and there is also a lifting rotating rod type (the handwheel rotates and lifts together with the valve rod, and the nut is arranged on the valve body). The globe valve is only suitable for fully open and fully closed, and can be adjusted and throttled when customized. When the globe valve is opened, when the opening height of the valve disc is 25% to 30% of the nominal diameter, the flow rate has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the globe valve should be determined by the stroke of the valve disc.
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