My Modu-Flo pump keeps blowing rupture discs why?
The most likely cause is high pressure due to blocked lines, bearing points or contaminant in the divider valve. Refer to Bulletin #30101 “How To Locate Blockage” as a starting point. Other possible causes are excessive pump flow for the line size and rapid application of the pump due to available air or hydraulic power. Reducing the pump stroke is sometimes helpful as is placing a flow restrictor in the pump air, or hydraulic supply port.
