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Hot Water Circulation Pump

Hot water circulation pump Model DG pump is a horizontal multi-stage centrifugal pump and suitable for transporting pure water (with the contained foreign matters' content less than 1% and graininess less than 0.1mm) and other liquids of both physical and chemical natures similar to those of...

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Hot water circulation pump

Model DG pump is a horizontal multi-stage centrifugal pump and suitable for transporting pure water (with the contained foreign matters' content less than 1% and graininess less than 0.1mm) and other liquids of both physical and chemical natures similar to those of pure water.

DG model middle and lowpressure boiler water supply pump is applicable to transport medium with temperature of not higher than 105℃ , and is also applicable for small boiler water supply or transporting medium similar to hot water.

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Performance 

Flow: 3.75~185m /h Corollary power: 4.0~400kW

Head: 69~684m Inlet diameter: 40~150mm

DG model hypo-high-pressure boiler water supply pump is applicable to transport medium with temperature of not higher than 160℃ , and is also applicable for small boiler water supply or transporting medium similar to hot water.

Cooling and seal of pump

The joint-part between suction section, intermediatesection and discharge section with be coated with molybdenum disulfide lubricating grease as seal. Rotor and fixed parts will be sealed by seal ring, guide-vane jacket and packing. The packing tensile degree of shaft seal should be proper and seep should be feasible dip by dip Unload run should be forbid. The seal ring and guide vane jacket should be replaced if they are too worn to be used any more and even do harm to pump work. There is spare shaft sleeve near shaft seal to protect shaft of pump. When temperature of the liquid transferred is above 80 ,cooled water should be filled to the water cooling packing gland and shaft seal cooling chamber. Cooled water should be clean water in normal degree. The pressure of water should be 1.5~3Kg/cm . The positions of cooling water pipe joints are different for various kind of water pump. Please refer to construction drawing of pump for axial position, and refer to chart 1 for radial position.Shaft seals are classified as packing seal and mechanical seal.The water seal water of packing seal is softened water, with pressure of 23kg/cm . The flushing water of mechanical seal is softened water, whose pressure shall be 3kg/cm higher than the inlet pressure.

Hot water circulation pump is suitable for the circulation and pressurization of cold and warm clear water in high-pressure operation system, water supply under parallel operation of several pumps in civil construction, water supply for fire control, boiler, cooling water system and the delivery of various liquid.

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