First, the product structure characteristics: type of compensation by the two bellows in the middle to take over and small rod with limit nut and other integral parts, which in the absorption of lateral displacement while absorbing axial displacement, but can not withstand the internal pressure thrust . 
 Second, model: factory production DNl00-8000mm pressure level: 0.1 ~ 2.5MPa. 
 Third, the connection: 1, flanged type 2, take over the connection type 
 Fourth, the amount of lateral compensation: 90 for a 537mm