First, the centrifugal pump to stop running after the request 1, centrifugal pump should stop running after the pump population valve, to be cooled and then turn off the auxiliary system valves. 2, high-temperature pump parking should be implemented according to the provisions of technical documents, after parking should be 20-30 min each turn a half circle until the pump body temperature dropped to 50 ℃ so far. 3, cryogenic pump parking, when no special requirements, the pump should always be filled with liquid; suction valve and the discharge valve should be kept normally open state; using double-ended mechanical seal cryogenic pump, liquid level controller and pump seal chamber seal Fluid should maintain pump grouting pressure. 4, conveying easy to crystallize, easy to coagulate, easy precipitation and other media pump, stop the pump to prevent clogging, and timely flush with water or other media pumps and pipes. 5, discharge the liquid stored in the pump to prevent corrosion and cracking. Second, the centrifugal pump mechanical seal static ring face failure of the cause analysis Centrifugal mechanical seal static ring end face crack common failure phenomenon, but also the most sealing parts failure one of the parts, then when these phenomena appear, the reason is where? 1, the installation of the sealing surface clearance is too large, too late to take away the rinse liquid generated by friction heat; rinse liquid leak from the gap in the sealing surface, resulting in overheating and damage. 2, the liquid medium vaporization expansion, so that the two ends by the expansion of the vaporization and separation, when the two sealing surface force fit, the destruction of the lubricating film resulting in the end surface overheating. 3, poor lubrication of liquid medium, combined with the operating pressure overload, the two sealing surface tracking rotation is not synchronized. For example, high speed pump speed of 20445r / min, sealing surface center diameter of 175px, the pump speed after the line up to 75m / s, when there is a sealing surface can not track the rotation delay, instantaneous sealing surface damage caused by high temperature. 4, seal flushing fluid orifice or filter blockage, resulting in insufficient water, so that machine seal failure.
HHBB type electric chain hoist is a light and small lifting equipment, which has the advantages of compact structure, light weight, small volume, strong versatility of parts and convenient operation. The reducer adopts hard tooth surface transmission design, which has long service life and high mechanical efficiency. The motor adopts a conical rotor brake motor, with up and down two-way safety limit device. Electric hoists can be widely used to lift heavy objects or installed on single-girder cranes, straight and curved I-beams, and can also be used on double-girder hoists, hoist gantry cranes or cantilever cranes. They are ideal for industrial and mining enterprises, railways, docks, and warehouses. Commonly used lifting equipment.
Hhbb Electric Chain Hoist,Manual Trolley Type Electric Chain Hoist,Travell Electric Chain Hoist,Manual Trolley Chain Hoist Hengshui Tianqin Import and Export Trade Co.,Ltd , https://www.itahoists.com
Centrifugal pump stop running after the request
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