The reasons for the operation of the pneumatic diaphragm pump are as follows: First, check whether the filter, pressure regulating and lubricating devices and the air inlet filter are blocked. Second, check whether the valve is stuck by impurities. Please remove the valve and clean it. Check whether the piston in the valve has scratch marks. If the surface of the piston is bright but not black, it means that the piston and "O" ring have been worn and need to be replaced. Marks of abrasion. If the surface of the piston is bright but not black, it means that the piston and "O" ring have been worn and need to be replaced. Please replace it with a new one. Third, check the spindle and "O" ring for scratches, wear and flattening. If there is any damage, please replace it.
Related products: