Pulsafeeder Pulsa GLM DM7 - Manual (Page 15)

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Figure 8, wet end components
GLM ® DM7 diaphragms do not have a specific cycle life; however, the accumulation of foreign
material or debris sufficient to deform the diaphragm can eventually cause failure. Failure can
also occur as a result of system over pressure or chemical attack. Periodic diaphragm
inspection and replacement are recommended. Each user should perform regular inspections
to determine the replacement interval that is appropriate to their system conditions.