YHB vertical gear pump seal leakage caused by a run, a sudden leak in normal operation. Sudden leakage in operation a few due to normal wear and tear or have reached the service life, and most are due to larger changes in operating conditions or improper maintenance. Botou City Taibang Valve Manufacturing Co., Ltd. 1, pump down, cavitation or longer pressure, resulting in seal damage; 2, the actual output of the pump is small, a large number of medium pump cycle, heat accumulation, causing the media Gasification, resulting in seal failure; 3, return flow is too large, resulting in suction side of the tube side of the container (tower, kettle, tank, pool) at the bottom of sediment damage, damage to seal; 4, for a long time outage, restart without Manual turning, friction due to adhesion and tear the sealing surface; 5, medium corrosive, polymeric, colloidal substances increased; 6, rapid changes in ambient temperature; 7, frequently changing or adjusting conditions; 8, Or downtime and so on. YHB gear pump suddenly leaks during normal operation, if not found in time, it will often lead to a larger accident or loss, we must pay attention to and take effective measures. .