Over 'pressuring' or applying too much cfm to a membrane diffuser will likely lead to rupture or causing the membrane to pull loose from the perimeter retainer. Over 'pressuring' also causes the membrane pores to over expand or enlarge beyond the optimum size and produce a larger bubble thus reducing the upwelling flow rate, reducing the size of the boil, and ultimately reducing the time it takes for a pond turnover. You loose efficiency. As the membrane ages, over 'pressuring' it will lead to premature failure of the membrane - shortens the life span.
One easy option to reduce this problem is to add a valve to the manifold and bleed off some of the excess air. Or add a second diffuser to the system.
Last edited by Bill Cody; 07/10/13 09:14 PM.
