GTL - DYQ340H Eccentric Hemispherical Valve, including body, wedge ball, valve seat, valve cover, stem, on the side of the valve body is equipped with the opening up of wedge sphere mounting holes, stem and wedge ball joint connection, at the bottom of the stem set equipped with spring, spring to wedge sphere as the first base, according to valve stem and the convex platform as a base, A seal is arranged between the upper end of the boss of the valve stem and the valve cover, and a sealing gasket is arranged between the valve cover and the valve body. The section of the seal is a wedge, and the boss or the valve cover is provided with a wedge sealing surface and the seal, and the oblique push surface is best arranged on the upper surface of the boss. Using the elasticity of the spring or the pressure of the medium used in sealing stem and valve cover section wedge sealing parts and sealing surface form wedge sealing, using the principle of the wedge to make the sealing surface more closely, sealing effect is better.
