Globe valve is used to fully open or fully closed. According to its function, cannot be used as throttle. Because in this case, due to the severe vibration of the medium through may make stop flashing Industrial Valves disc damage and accidents. But the throttle valve flap design, want to consider to completely shut down sweet sealing performance. The following data about globe valve hydraulic characteristics, suitable for precise transmission power calculation, can also be used in identification of closed valve work. Within the cut-off valve, open the size of the cross-sectional area Ak, decided by the structure of the disc and the opening height of the seat. For plane sealing, the size of the open area can be pressed type approximate calculation: if Ak = PI Dch for conical disc ( Needle valve, as shown in figure 3 - 142c) When, can press type calculation Ak = PI ( Dc - hsinαcosα) Hsin alpha flat disc with chamfer in terms of its shape, between plane and cone. If the valve opening is very small, the bottom of the disc is not higher than the seat surface above, can use formula of conical disc; If the opening is bigger, Ak value close to the face seal disc formula determined data, the opening of the disc height, should press at the bottom of the disc and the distance between the seat surface. DN25mm cut-off valve fluid resistance, distance depends on the valve seat valve opening.
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can be used in a wide variety of ways.