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Under factory testing, our black Buna-N diaphragms last on the order of 1 million cycles. While this may seem like a lot of cycles, keep in mind that a pump running 24/7 at 72 rpm will reach one million cycles in a little over 10 days!
Under operating conditions in which the pump is generating significant positive or negative pressure (i.e., vacuum), diaphragm life may be shortened. Additionally, the choice of diaphragm material will affect diaphragm lifetime. While our Buna-N diaphragms (made of an FDA-approved formulation of Buna-N) last on the order of 1 million cycles, our recently introduced santoprene diaphragm (off-white in color, also made of an FDA-approved material) can last in excess of 5 million cycles. You should inspect your Guzzler pump on a regular basis to look for signs of wear and tear on your pump diaphragm and its components.