Guide vane operation structure includes the guide vane arm clip board, guide vane arm, segmental keys, connection board, handle, cut pin, connecting rod pin and gland, etc.

Metal Clad Wipers are designed to press-fit into open face rod wiper glands, with no need for snap-rings, face plates, or other retention devices to hold the wiper in the gland.

The utility model provides the a valve rod leakage-proof device of a gland type valve, comprising clamp apparatus and special bolts;