Pulsafeeder Pulsa GLM DM7 User Manual download pdf (Page 4)

1. Introduction

The GLM

DM7 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.

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Pulsafeeder Pulsa GLM DM7 User Manual Page 4