Posts Tagged ‘positiv displacement pump’

The basis of rotary positive displacement pump technology

Tuesday, November 21st, 2017 von admin

This is a tale of two pump curves in storage and terminal applications: one steadily bending downward from pump shut-off head, the other barely a curve at all. Both curves match two different pump technologies used in the oil & gas industry. Only one of those pump technologies can achieve certain critical objectives for reliably pumping hydrocarbons with highly variable fluid properties and under varying operating conditions.

The nearly vertical “pressure stiff” performance curve of rotary positive displacement (PD) pumps stems from a basic principle: As a volumetric fluid handling technology, rotary PD pumps create flow and are insensitive to system pressure changes. They deliver a nearly constant volume of liquid over a range of discharge pressures. If your flow or pressure demands change frequently, or even occasionally, on any given day, keep this fact in mind when selecting pump technology for hydrocarbons.