- B What Is The Required Size Of A Process Control Valve That Is Needed To Control The Flow Of Water When A The Maximum F 1 (383.95 KiB) Viewed 57 times
b) What is the required size of a process control valve that is needed to control the flow of water when a the maximum flow required is 0.002 m/s and the permissible pressure drop across the valve at this flow rate is 100 kPa? The density of water is 1000kg/m. The typical flow coefficients and valve size are presented in the following table. The relationship between the flow rate Q and the size of a wide-open valve is: ΙΔΡ Q = Ay, P Valve size (mm) Flow coefficient 480 6-40 800 960 1260 1600 1920 2560 C 8 14 22 30 50 75 110 200 4.x10$ 19 33 52 71 119 178 261 474 c) A circular cam of diameter 200 mm has an eccentric axis of rotation which is offset 40 mm from the centre. A knife follower with its line of action passing through the centre of rotation is used with this cam: i. What will be the difference between the maximum and minimum displacements of the follower? Show your working. ii. Sketch the displacement profile of the follower.