This paper expounded the production process of the inlet and outlet heat exchangers of the Styrene Plant,and mainly introduced operation procedure and technological test of the inner-hole welding process,the fabrication of flexible sealing strips,scheme of integral assembling,and so on.

Analysis of the leakage rate francis of the francis pump-turbine runner s sealing device and its effect on operation of the set;

Application of sealing device in the system of mill rotary tray;

Point at the air-leakage problem of sealing device of forced draft circular cooler in MAGANG №1 Ironmaking Works,the structure defects of traditional sealing device were analyzed.

Because its operation environment changes,the local damage in the seal device of global valve increases year by year,which directly threatens the open or stop of generating set automatically.

Taking the erec tion of labyrinth seal device and radial contact seal device as the examples, an d in the light of the radial jumping and axial playing of the rotary kiln s cyli nder that occur in the actual erection and other problems, this paper puts forwa rd some erection points and erection skills of guaranteeing the erection precisi on of the seal under the conditions o.

Hydraulic vat seal device determines hydranlic system properties.

Combining a practical project,authors present some specific methods and suggestions on the twice high pressure splitting grouting,such as mix ratio of grout,casing tube and sealing arrangement,etc.