Filler scour prevention governing valve

The utility model discloses a filler scour prevention governing valve. It includes valve body, valve gap and valve rod, and the upper segment inner wall of the mounting hole of valve gap is provided with the arrangement chamber of packing, and the filler is settled the intracavity to settle and is sealed the filler between valve gap and valve rod, and the top in the arrangement chamber of packingis provided with the filler pressure cover that is used for compressing tightly the filler, and the cover has one can press the hold down grid of sheatheeing in the pressure of packing on the valve rod, still is provided with the sealing washer resettlement groove that being located the filler and settling the below in chamber on the inner wall of the mounting hole of valve gap, and it has the sealing washer to settle in the sealing washer resettlement groove. After adopting foretell structure, can form reliably compressing tightly of filler, but also prevent the medium directly to erode the filler through the clearan