Why Does a Miniature Diaphragm Pump Rock on a Flat Surface?
Learn why a motor housing can prevent a miniature diaphragm pump from sitting flat, and how to check the intended mounting faces and fixing points.
Watch the diaphragm pump mounting explanation
Which pump surfaces are intended for mounting?
A pump that rocks when placed on a bench may be resting on a housing feature rather than a mounting face. The video explains a projection associated with the motor bearing and points to the intended mounting arrangement.
Separate a housing feature from a mounting datum
The outer motor case does not necessarily form a flat support surface. Check the product drawing for the intended orientation and fixing points rather than judging mounting suitability from bench placement.Do not remove the projection
Do not grind or flatten a housing feature to make the pump sit level. Confirm its purpose and use the specified mounting features so that the motor and bearing arrangement remain intact.Distinguish rocking from vibration in service
A loose pump on a bench and a mounted pump vibrating during operation are different conditions. For an installed problem, inspect the fixings, support stiffness, tubing loads and operating speed.
Review liquid pump mounting drawings
Use the drawing for the selected DPL30 or DPL60 motor configuration to locate the mounting points. Confirm the assembly orientation and surrounding clearances before designing the support or bracket.