Pulsafeeder OMNI Series DC7 - Manual (Page 4)

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1. Introduction
The OMNI ® metering pump is positive displacement, mechanically operated reciprocating
diaphragm pump. Each pump consists of a power end and a process end separated by a Teflon
faced diaphragm. Individual pumps will vary in appearance due to various liquid ends and
accessories; however, the basic principles of operation remain the same.
2. Principles Of Operation
Figure 1, reagent head operation
A diaphragm reciprocates at a preset stroke length, displacing an exact volume of process fluid.
Diaphragm retraction causes the product to enter through the suction check valve. Diaphragm
advance causes the discharge of an equal amount of the product through the discharge check
valve.