Pulsafeeder Pulsar Shadow - Manual (Page 7)

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2.2 Component Location and Operation
Figure 2
2.2.1 Reagent Head Assembly
The typical reagent head assembly consists of reagent head,
diaphragm, and suction and discharge check valves. This
assembly is the only part of the pump to contact the process
liquid; consequently, maintenance is critical to pump
performance.
Figure 3