What are the reasons for a vertical circulating pump to stop leaking?

　　What are the reasons for vertical circulating pump leakage on shutdown

　　Vertical circulating pump leakage in the shutdown, if not found in time may cause unnecessary losses, to solve the problem of vertical circulating pump shutdown leakage, we need to find the root cause of the problem, in order to prescribe the right medicine to do a good job of maintenance.

　　1, the reason: the exit is too high, not installed check valve; solution: the exit pipeline is too high, not installed check valve need to install check valve.

　　2, Reason: the liquid level is too high; Solution: the liquid level is higher than the pump body at the square plate, you can reduce the liquid level or raise the height of the pump.

　　3, Reason: liquid seal and ceramic seat gap is too large; Solution: liquid seal did not contact the ceramic seat, need to adjust the distance between the liquid seal and the ceramic seat.

　　4, Reason: the inlet flange is not connected; Solution: the flange screws are not locked or law gasket misalignment, confine the screws or adjust the gasket position.

　　Acid and alkali vertical submerged pump packing seal leakage of excessive other reasons and their solutions:

　　1, when the packing is used for a period of time it will lose its elasticity and lubrication, thus causing leakage. The solution is to replace the packing regularly.

　　2, packing, gland, packing sleeve, packing ring and other parts are damaged, packing seal leakage at startup, and the leakage increases quickly, although constantly tighten the packing gland, but still leak more than that, resulting in the inability to work, the solution needs to be immediately replaced with damaged packing seal parts.

　　3, the packing material does not meet the requirements or poor installation of packing and serious leakage, the solution is to reasonably select the packing material, so that it meets the requirements and the correct installation of packing

　　4, the installation of packing bushings and other parts of serious wear, or packing box and bushings and other parts of the radial clearance is too large and caused by leakage, the solution is to replace the bushings in a timely manner or the use of bushings on the surface of the chrome-plated and other methods.

　　5, if the end face of the bushings installed rubber ring, there may be blown and cause serious leakage, the solution is to replace the rubber ring in a timely manner, the newly installed bushings eccentricity is large, the bushings should be made to improve the coaxiality and meet the requirements.

　　6, long time rot, can be replaced packing, and make its material to meet the requirements.