This paper introduced the unloading valves for blocking in paver, application of screeding unitfloating functions, blocking functions and relief functions in road construction, the unloading capacity calculation methods.

Analysis of high temperature of bearing liners for 600 MW steam turbines in sequence valve operation modes;

Analysis of sequence valve control mode of 600MW supercritical steam turbine

It is described that the two 600MW turbine units could not be switched to sequence valve control mode and had been always running at single valve mode because of the problems of the turbine structure,installation and operation,and therefore,the efficiency of the units was at depressed level.