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Notes on troubleshooting, repair, and installation of CQ magnetic drive pumps

2021-07-12View Original

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(1) Magnetic drive pumps should be installed horizontally and not vertically; the plastic pump body must not bear the weight of the pipelines. In cases where vertical installation is required for special reasons, the motor must face upwards. (II) When the liquid level at the suction point is above the pump’s axis, it is sufficient to open the valve on the suction pipeline before starting the pump. If the liquid level is below the pump shaft’s axis, a bottom valve must be installed on the pipeline. (III) The pump should be inspected before use; the motor blades must rotate smoothly, without any jamming or abnormal noises, and all fasteners must be tightened properly. (IV) Check whether the rotation direction of the motor matches the orientation mark of the magnetic pump. (5) After the motor starts, slowly open the discharge valve; once the pump is in normal operation, adjust the discharge valve to the desired opening degree. (VI) Before stopping the pump, the discharge valve should be closed first, and then the power supply should be cut off. VII. Precautions for Use (1) Since the cooling and lubrication of the pump’s bearings depend on the medium being transported, operating the pump without any medium is strictly prohibited. Additionally, it is necessary to avoid operation with no load after a power outage during operation. (II) If the medium being pumped contains solid particles, a filter screen should be installed at the pump inlet; if ferromagnetic particles are present, a magnetic filter is required. (III) During operation, the ambient temperature for the pump should be below 40°C, and the temperature rise of the motor must not exceed 75°C. (IV) The medium to be pumped should fall within the permissible range for the pump materials. The operating temperature for fluoroplastic pumps should not be lower than minus 30 degrees, nor higher than 100 degrees. Liquids that contain no hard particles or fibers, with an inhalation delivery pressure not exceeding 0.2 MPa, a maximum operating pressure of 1.6 MPa, a density not exceeding 1600 Kg/m3, and a viscosity not exceeding 30 X10-6 m/s. (5) For media that tend to precipitate or clot easily when transported, the pump should be cleaned promptly after use to remove any accumulated liquid inside it. (VI) After the magnetic pump has been operating normally for 1,000 hours, the wear of the bearings and the dynamic rings on the end faces should be inspected, and any worn-out components that can no longer be used should be replaced.

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