DYQ340H tops valve,

Shanghai crown ring Valve Manufacturing Co., coat ball valve, DYQ340H top entry ball valve oblique thrust surface is preferably provided at the upper surface of the boss, the pressure force of the spring or the media used to seal between the valve stem and bonnet-section constituting the wedge with wedge-shaped sealing member and the sealing surface of the seal, the use of the principle of the sealing surface of the wedge closer, better sealing effect. I. Product Overview: DYQ340H tops valve, comprising a valve body, wedge-shaped ball, valve seats, valve cover, with a wedge-shaped sphere mounting hole opening up on the side wall stem, valve stem with the wedge-shaped ball joint connection In the lower part of the stem sleeve provided with a spring, the spring in order to wedge the ball as the first base to the stem established by bosses as another base, boss between the upper end of the valve stem and valve cover features seal between the valve cover and valve body provided with a sealing gasket, the cross-section of the seal member is wedge-shaped, the boss or the valve cover provided with a corresponding inclined push surface and the sealing member constituting the sealing engagement wedge, Pressure oblique thrust surface is preferably provided on the upper end face of the boss, the use of force of the spring or the media used to seal between the stem and the valve cover wedge-shaped cross-section seal and seal mating surface structural wedge by wedge principle sealing surface more closely, better sealing effect. Second, the main external connection size CLASS 600: NPS A A1 A2 WHB 2 "292 295 292 350 150 50 3" 356 359 356 400 188 76 4 "432 435 432 400 230 100 6" 559 562 559 500 300 150 8 "660 664 66060043020110 "787 791,787,600,445,252 12" 838 841,838,600,530,305 Top entry ball valve http://www.ghval.com/product/qf/105.html Shanghai http: //www.ghval. com / productlist / qf-1.html