Could you please help me check if the pump pipes are connected correctly?
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This pump is an involute internal gear pump; when viewed from the motor side, it rotates clockwise. The horizontal pipe serves as the inlet, while the vertical pipe is the outlet. But it seems to me that with clockwise rotation on the motor side, the inlet and outlet are reversed! Those who understand, please take a look. Thank you
But it doesn’t seem to be a centrifugal pump. There is indeed a sense of symmetry. It is necessary to search for information on the pump model for verification. Using your hands can solve problems
The pump outlet should have markings; clean it up and look for them. Please also pay attention to a few other aspects: whether the pipe material matches the flange bolts, whether the inlet support matches the pipe material, whether the pump outlet flange is suitable, the specifications of the tee at the outlet and the quality of the welding on the branch pipes, and whether the piping of the outlet vertical pipe complies with ISO standards (there is an extra weld joint). Discuss with the design team whether it is necessary to add a drain valve at the inlet; if not, the reducer may be installed in the wrong orientation.
Variable diameter, eccentric connectors, offset fittings! There are such things in the pipes
There aren’t many welds on the export riser; upon closer inspection, the upper and lower outer diameters of that reducing short pipe swage nipple are different.
This post was last edited by Turandot on 2017-4-12 at 08:43. The driving internal gear on the shaft causes the internal and external gears to rotate in the same direction; at the inlet, the gears separate from each other, creating negative pressure that draws in the liquid. At the outlet, the gears continuously mesh with each other, forcing the liquid out. Generally, pump bodies are equipped with direction indicators, and internal gear pumps can also transport fluid in the reverse direction by simply changing the rotation direction of the motor. So even if the import and export are reversed, adjusting the motor wiring will do.
If you stand on the side of the motor that faces the pump and the motor rotates clockwise, then the inlet and outlet connections are correct. A gear pump is a type of positive displacement pump. If it is discovered that the connections are incorrect during individual testing, adjustments can still be made using method 7#.
The new pump has a steering mechanism (motor, pump head) – it depends on your unit; it’s likely an internal gear type, and generally, operating it in reverse is the correct approach~~