First, the SG-type pipeline pump installation assembly and disassembly 1. All the components to be installed scrub clean. 2. Install a mechanical seal on the motor shaft, add a small amount of clean turbine oil or 20 oil on the surface of the mechanical seal with static and dynamic fit. 3. Install impeller, fasten with impeller nut. 4. Install "0" ring, the pump body and the motor cover bolted words. Note that the gap between the impeller front cover and the pump body is 2 × 0.5 mm, and the impeller inlet outer ring and the pump body ensure a certain running clearance. 5. Disassembly order is the opposite. Installation and use 1. Use rubber gaskets and bolts to connect the flanges on both ends of the pump body to the flanges of the pipelines. In order to facilitate the use and maintenance, in the pump inlet and outlet piping should be installed with a control valve. 2. Open the inlet regulator, allowing water to enter the pump to keep the sealed chamber full of liquid (otherwise it will damage the seal) and close the outlet valve. 3. Turn on the power, jog to determine the correct steering. 4. Turn to determine, the pump starts, run. 5. Adjust the outlet valve opening so that the pump runs around the design point, depending on the pump's rated flow and near the head. For this purpose, it is best to install a pressure gauge near the outlet flange. Note: The pump is strictly prohibited running water, so as not to damage the seal. Second, the SG-type pipeline pump troubleshooting: Failure reasons 1. Pump not water into the pump water is not enough, the rotation direction is not, the impeller flow blockage. Fill the water pump again, the transmission impeller runner, adjust the rotation direction. 2. The pump flow less than part of the pump blockage, the number of revolutions is too low, the total lift above the pump rating, impeller damage. Clean the pump and pipe, replace the impeller, increase the pump shaft rotation, adjust the outlet valve. 3. Outlet pressure in the liquid air, speed is too low, impeller damage, the outlet valve opening too large. Exclude the liquid air, increase pump speed, replace the impeller, adjust the small outlet valve. 4. pump power consumption is too large (motor fever) Mechanical defects such as running clearance is too small, the motor shaft bending, bolts loose, the pump is too much work flow under the pump that is far below the rated head work. Check the mechanical part of the timely adjustment process, adjust the outlet valve so that the pump in the vicinity of the rated flow and lift work. 5 pump vibration pipe system support is not good, part of the impeller blockage caused by imbalance, resulting in cavitation, the liquid in the air. Check the pump support sector, tighten the nut, impeller impeller to balance, to exclude air traffic. 6. Pump leakage mechanical seal damage, 0-ring damage, pump leakage. Replace the mechanical seal and 0 ring, welding pump body leakage. 7. Pump miso sound too heavy bearing overheating, pump overload. Bearing Department refueling, according to 4 excluded.
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