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High temperature heat transfer oil pump is not oil on the reasons
Centrifugal pump with its simple structure, convenient use and maintenance of hot oil pump, high efficiency thermal oil pump and become the most widely used agricultural pump, but also because sometimes air-cooled centrifugal oil pump to mention It is annoying to go to the water. Centrifugal pump is now on the cause of this failure to analyze the residue pump. Inlet pipe and pump body air (1) High-temperature heat transfer oil pump Some users in the pump before the start is not filled with enough water; sometimes it seems irrigation water has overflowed from the vent hole, but the high temperature heat transfer oil pump but did not turn the pump shaft air completely discharged , Resulting in a little air still remaining in the inlet pipe or the pump body. (2) The horizontal section of the inlet pipe in contact with the pump applies a descending gradient of 0.5% or more to the direction of the flow of water, and the one end connected to the inlet of the pump is the highest, not to the full level. If you tilt up, there will be trapped air inlet pipe, reducing the vacuum hose and pump, affecting water absorption. (3) High-temperature heat-conducting oil pump's packing has been worn for a long time or the packing pressure is too loose, resulting in a large amount of water being ejected from the gap between the packing and the shaft sleeve. As a result, external air enters the pump from these gaps Internal, affecting the water. (4) Inlet pipe Due to long-term potential underwater, pipe wall corrosion holes, water pump work continues to decline, when these holes exposed water, the air from the hole into the water pipe. (5) cracks in the inlet pipe cracks, inlet pipe and pump connections appear tiny gaps, are likely to make the air into the inlet pipe. Centrifugal pump not mention the impact of other factors 1) the valve can not open. Usually due to the pump on hold time is too long, high temperature heat transfer oil pump, hot pump bottom valve gasket was sticky, non-gasket valve may rust. 2) The bottom valve filter screen is clogged; or the bottom valve causes potential filter plugging in the sludge layer. 3) impeller wear serious. Impeller blades worn by long-term use, affecting the pump performance. 4) gate valve or check valve failure or blockage will result in reduced flow or even pumping out the water. 5) high temperature heat transfer oil pump, hot oil pump outlet pipe leakage will affect the amount of water.