The characteristics of power pneumatic control valve size

Plant characteristics of pneumatic control valve size 1 > discharge area of the valve when the fluid channel, the minimum cross-sectional area. 2 > port area of the inlet valve is to shut down the smallest cross-sectional area of flow channel between a sealing surface. 3 > port diameter corresponds to the diameter of the port area. 4 > curtain area when the pneumatic - valve disc in the seat above litre starting-up-and-stopping, between the sealing surface to form a cylinder shape or foot cone shape discharge channel area. 5 > open high degree of power pneumatic control valve disc from the closed position the actual schedule. 6 > open rated high that the design of the power station pneumatic - valve reaches its rated capacity on high. 7 > sealing surface Angle valve axis and the Angle between the sealing surface. Plane sealing valve sealing surface Angle is 90 °. 8 > the area of the sealing area is determined by sealing surface average diameter. 9 > MAO seal on both the disc diameter and average diameter of the seat contact area