welding check valve size, and the relationship between scientific medium flow

welding check valve flow rate and flow velocity 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, etc. The factors have certain inner link. What is the relationship between valve size and the medium flow rate?

all kinds of medium flow rate of valve port area and the velocity and flow rate has a direct relationship, but the flow velocity and flow rate are two interdependent. When traffic must flow 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, valve size can be smaller, but the resistance loss is bigger, the valve is easy to damage. 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 determined by experience. Through the flow velocity and flow valve nominal diameter can be calculated. 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 Industrial Valves.

welding check valve installation note:

1. Do not make the check valve in the line to bear weight, large check valve shall be independent, so the pressure of the impact from the piping.

2。 When installation should pay attention to the medium flow direction in accordance with the body the direction of the arrow.

3。 Vertical elevating disc check valve should be installed in vertical pipe runs.

4。 Elevating the level of disc check valve should be installed in horizontal pipe runs.

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