Industrial Application Data No. 97 10/99 Flawless Operation With The Merlin Pump From Mono ® NOV The Merlin progressing cavity pump underwent rigorous tests, alongside air diaphragm, gear and lobe pumps, to ensure its suitability for the duty. The low speed Merlin pump has a gentle conveying action to ensure the integrity of the shear sensitive PVC coating. Vigorous action of the gear pumps created too much heat causing the PVC to so

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