Features of flat welding flange for electric ball valve of hydropower project. The electric ball valve of hydropower project can be used as a pipeline compensation joint in the circulating water pipeline system. Flat welding flange is a special companion flange for electric ball valve of hydropower project, which not only saves space and reduces weight, but also ensures that the joint will not leak and has good sealing performance. The compact flange size is reduced because the diameter of the seal is reduced, which will reduce the section of the sealing surface. Secondly, the flange gasket has been replaced by the sealing ring to ensure that the sealing face matches the sealing face.
In this way, only a small amount of pressure is required to compress the sealing surface. With the reduction of the required pressure, the size and the required number of bolts can be reduced accordingly, so a new product with small volume and light weight (70%~80% less than the weight of the traditional flange) is finally designed.
Therefore, flat welding flange is a relatively high-quality flange product, which reduces the mass and space and plays an important role in industrial use. Whether the water flow direction in the pipeline should be considered when installing the electric ball valve in the hydropower project? Pipe expansion joints have directionality in some attributes, such as flow, flow rate, hydraulic pressure and other basic attributes. Their directions are oriented according to the set direction of the pipe. Only when the set direction of the pipe is given, can the nodes at both ends of the pipe be defined as the start point and end point respectively. However, it should be noted that the set direction of the pipeline is not necessarily equal to the flow direction of the water in the pipeline, because the flow direction in the pipeline may change at any time, and cannot be determined before calculation.
It is necessary to assume a direction first, but if the actual flow direction is not very consistent with the set direction, it needs to be processed by mathematical means, that is, it is represented by a negative value. Generally speaking, when the flow, deceleration and pressure drop of the pipe section are all negative, it indicates that their direction is opposite to the set direction of the pipe. In theory, the direction of the expansion joint can be set by hot negotiation. In order to avoid more negative values, the set direction and flow direction of the pipe are usually consistent.