1results about How to "Tightly blocked" patented technology

The utility model provides a piston combination formula pressure reducing valve with back flush function relates to pressure reducing valve technical field, including valve seat, valve rod and blowdown passageway, the left part of valve seat is provided with the import, and the right part of valve seat is provided with the export, and the inside middle part of valve seat is provided with the valve port, the lower part of valve seat middle part is provided with the blowdown pipe mouth, and the blowdown pipe mouth lower assembly has the blowdown passageway, the right side of blowdown passageway is provided with the side pass pipe, and is linked together and is provided with between blowdown passageway and side pass pipe, the upper part of valve seat is provided with the valve cover, and the middle part of valve cover is installed with valve rod, the upper part of blowdown passageway is provided with the outer connecting hoop, and the outer connecting hoop is through the thread twist and is combined in the blowdown pipe mouth outside, is provided with the first connecting hole in the blowdown pipe mouth. The utility model is convenient when back flush, and the back flush waste liquid is discharged alone, and the combination installation or split is convenient, and the structure is safe and compact and reliable, avoids the leakage, and is safer, more efficient and practical.