The flow rate and velocity of the valve mainly depend on the diameter of the valve, and are also related to the resistance of the structure of the valve to the medium, and at the same time have an intrinsic relationship with the pressure, temperature and concentration of the medium of the valve.
What does the two have to do after all?
The flow channel area of the valve is directly related to the flow rate and flow rate, and the flow rate and flow rate are two interdependent quantities. When the flow rate is certain, the flow velocity is large, and the flow channel area can be smaller; If the flow velocity is small, the runner area can be larger. On the contrary, the flow channel area is large, and its flow velocity is small; The flow channel area is small, and its flow velocity is large.
The flow rate of the medium is large, and the valve diameter can be smaller, but the resistance loss is large, and the valve is easy to be damaged. The flow rate is large, and the electrostatic effect will occur on flammable and explosive media, forming a danger; The flow rate is too small, the power is low, and it is not economical. For viscous and explosive media, a smaller flow rate should be taken. The flow rate of oil and liquid with high viscosity is selected according to the viscosity, generally 0.1~2m/s.
In general, the flow rate is known and the flow rate can be determined by the experience. The nominal diameter of the valve can be calculated by the flow rate and flow rate.
The valve diameter is the same, its structure is different, and the resistance of the fluid is also different. Under the same conditions, the greater the resistance coefficient of the valve, the more the flow rate and flow rate of the fluid through the valve decrease; The smaller the resistance coefficient of the valve, the less the flow rate and flow rate of the fluid through the valve will drop.
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