Description A.Y. McDonald Diaphragm Pressure Tank - In-Line, 2-6 Gal Baker Water Systems DuraMac In-Line Diaphragm Pressure Tank. Installed directly in the main water supply with a 3/4" MNPT connection. Steel construction with internal polypropylene lining and chlorobutyl membrane fixed to the tank wall by a steel ring. Factory pre-charged at 40 PSI. 100% factory tested. Technical Details Fixed butyl membrane Stainless-steel water connection Internal lining in polypropylene Finished with polyurethane paint on epoxy base Air valve plug sealed with O-ring No maintenance required Maximum working pressure: 150 PSI Maximum working temperature: 194°F NSF 61, R&T, ACS, CE certifications Factory pre-charged 40 PSI 100% factory tested 3/4" MNPT connection How It Works Start-Up Cycle With water chamber empty, diaphragm is pressed against bottom of chamber. Fill Cycle As water is pumped into water chamber, diaphragm is forced upward into air chamber. Hold Cycle When pressure in air chamber reaches pump cut-off point, diaphragm is in uppermost position, water chamber is filled to rated capacity. Delivery Cycle When water is delivered to system, pump remains shut off. Air pressure in top chamber forces diaphragm downward. Datasheets Pressure Tanks Guide
