Introduction to electric valve medium velocity and size have what relation

Introduction to electric valve medium velocity and size have what relation? Electric valve flow and flow rate depending on the size of valve, also associated with the structure of medium resistance of the valve, with the pressure of the valve at the same time, temperature and the concentration of the medium and other factors with corresponding inner link. Port area and the velocity and flow of the valve has a direct relationship, but the flow velocity and flow rate are two interdependent. When flow phase at the same time, velocity, flow area can be smaller; Small flow rate, flow area can be larger. On the other hand, the flow channel area is large, its velocity is small; Port area is small, its velocity. Medium velocity is large, valve size can be smaller, but the resistance loss is bigger, is easy to damage the valve. Velocity of flammable and explosive medium can produce electrostatic effect, dangerous; The flow rate is too small, the efficiency is low, not economic. On viscosity and explosive medium, should take smaller flow velocity. Oil and the viscosity of the liquid with viscosity size choose velocity, generally take a 0. 1 - 2m/s。 Under normal circumstances, the traffic is known, the velocity can be confirmed by experience. Through the flow velocity and flow of electric valve nominal diameter can be calculated. Electric valve size is the same, its structure is different, the fluid resistance is different also. Under the same conditions, the greater the resistance coefficient of valve, the more fluid flow velocity and flow rate drop across the valve; The smaller the resistance coefficient of valve, the less fluid flow velocity and flow rate drop across the valve.