Product usage
PQ47 eccentric semi-ball valve uses eccentric valve body, eccentric ball and valve seat. When the valve rod is rotating, the valve will be closed more and more tightly in the process of automatic centering on common track, realizing good sealing completely. The valve ball is completely separated from the valve seat, which eliminates the abrasion of the sealing ring and solves the problem of abrasion between traditional ball valve seat and ball sealing surface. Non-metallic elastic material is embedded in the metal seat, so that the valve seat metal face can be protected well. This product is especially suitable for the iron and steel industry, aluminum industry, fiber, small solid particles, paper pulp, coal ash, petroleum gas and other media.
Product characteristics
1.Its structure adopts the eccentric wedge-caulking principle to achieve the purpose of tightening, regulating and closing through the drive mechanism. The sealing pair adopts metal face band hard-contact sealing. For the double eccentric structure, when it is open, the valve element is located in the ball chamber, so that the flow area is large and the valve will not be flushed; when it is closed, the valve element will not be flushed. When the valve is opened, the valve element moves forward gradually along the valve seat, which can effectively remove scaling obstacles and realize reliable sealing. It is especially effective for the transportation of mixed flow precipitated by two-phase mixed flow easy-scaling solid.
2.The semi-ball of the valve is made of bimetal, and different kinds of alloys are surfaced on the base metal. The valve seat is also treated specially by surfacing, and the sealing surfaces having the functions of anti-corrosion, wear-resistance and high strength are formed, to meet the demands in different occasions.
3.Tight sealing and zero leakage can be realized when delivering harmful gas.
4.The valve element of the sealing pair has compensation, so when the valve seat is worn, the valve can be reliably sealed after the valve seat is slightly rotated when it is closed, which can prolong the service life. In addition, users can remove the compression nut, adjust or replace the valve seat, after that, the valve seat can still be used, which avoids the scrapping of the whole valve in the event of the seal failure of the valve.
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