In operation, the compact boiler is completely and automatically self-operating, employing flue gas recirculation (FGR) wherein the FGR is admitted into the burner combustion air through a valve controlled by boiler flue gas NOX content. A novel bell mouthed flue gas scoop is utilized in the ...
The mechanical operating means is provided with a wedge travel path and adapted to press the control valve stem (7) when force is applied externally and to keep it pressed in without applying external force, further it is adapted to release it when force is applied externally and to keep it...
During the operation of the valve, the conical surface 25 acts to clutch the split nut 22 on to the screw 30 and prevent relative rotation, but when this pressure is released as the valve closes, any clearance that has formed is automatically taken up by relative movement between the screw...
HOOK BLOCK OPERATING DEVICE IN SELF-TRAVELING CRANEPURPOSE: To effect easy and accurate enclosure release of a hook block in any working condition. ;CONSTITUTION: The lowering side oil passage 67 of a winch switching valve 44 and the rising side oil chamber 10a of a rising/falling cylinder 10...