The effective solution to the above-mentioned problem is to improve the motion characteristics of the valve ball by enlarging the bore of the valve seat. and reducing the radial clearance between ball and bonnet.

• 增加阀座孔径、减小闹球与闽罩的径向间隙，以改善阀球运动特性，是防止柱塞断、脱、漏的有效措施，柱塞断脱率可从14.；4%25下降到2