The construction of Shenyang valve expansion joint requires the importance of expansion joints in pipeline installation. Because the temperature of expansion joints connecting expansion pipes or bellows changes greatly, the use of expansion joints is a protective measure. Expansion joints are new products connecting pumps, valves, pipelines and other equipment with pipelines. They are connected by full bolts to make them become a whole with a certain displacement, Easy to install. It can bear the axial pressure of pipeline. In this way, during installation and maintenance, it can be adjusted according to the on-site installation size. During operation, it not only improves the work efficiency, but also plays a certain role in protecting pipeline equipment such as pumps and valves.
Electric ball valve is also called valve electric ball valve, flexible electric ball valve, flexible electric ball valve, valve shock absorber, etc. The product is mainly composed of tubular valve parts composed of inner and outer rubber layers, cord layers and steel wire rings, which are vulcanized at high temperature and high pressure and then combined with metal flange loose sleeves. It is widely used in fire protection, chemical industry, pump valve and other pipeline systems, playing the role of earthquake resistance and noise reduction, and absorbing the displacement generated during pipeline operation.
Precautions for installation of electric ball valve:
1. The installation length of the electric ball valve is calculated on the outside of the sealing surface of the valves at both ends of the ball, and the products are not divided into flow directions;
2. It is forbidden to conduct hydraulic test when the connecting bolts of each part are not fastened;
3. It is forbidden to open the connecting bolt between the electric ball valve and the pipeline during the water pressure test and operation stages;
4. It is prohibited to pre stretch the installation beyond the natural length of the electric ball valve;
5. The pipeline must be provided with fixed support or fixed bracket, and the force of the fixed bracket must be greater than the axial force. During vertical installation and overhead installation, corresponding fixed supports and forced supports shall be installed at both ends of the product to prevent pulling off under working pressure.