A positive displacement pump traps a fixed volume of liquid and forces it into the discharge line, so flow stays close to proportional to pump speed whatever the pressure. Power Energy supplies positive displacement pumps in Saudi Arabia and the GCC for viscous, abrasive, shear-sensitive and high-pressure liquids that centrifugal pumps handle poorly. Tell us the fluid and duty and we will recommend the right type.
Types of Positive Displacement Pumps We Supply
- Progressive cavity pumps — steady, low-pulsation flow for sludge, slurry and viscous fluids. See progressive cavity and twin screw pumps.
- Screw pumps — twin screw designs for a wide range of viscosities. See screw pumps.
- Reciprocating pumps — piston and plunger pumps for high pressure and accurate flow. See reciprocating pumps.
- Peristaltic pumps — hose pumps where the liquid touches only the hose. See peristaltic pumps.
- Diaphragm pumps — air-operated and metering designs. See AODD pumps and chemical dosing pumps.
Positive Displacement or Centrifugal?
- Choose positive displacement for viscous liquids, because efficiency holds up as viscosity rises while a centrifugal pump loses performance quickly.
- Choose positive displacement when you need a steady flow regardless of discharge pressure, or accurate dosing.
- Choose positive displacement for shear-sensitive liquids and for liquids with solids, depending on the type.
- Choose a centrifugal pump for large volumes of thin, clean liquids at moderate pressure.
Important Operating Rule
A positive displacement pump must never run against a closed discharge valve. The system needs a pressure relief valve or equivalent protection on the discharge side. We include this in every recommendation.
Industries Served
- Refineries and petrochemicals
- Water and wastewater treatment
- Chemical processing
- Food and beverage
- Industrial manufacturing
Read our guide to positive displacement pump types.
Frequently Asked Questions
What is a positive displacement pump?
A positive displacement pump moves liquid by trapping a fixed volume and pushing it into the discharge line. Flow depends mainly on pump speed, not on discharge pressure.
What are the main types of positive displacement pump?
The main types are rotary pumps (progressive cavity, screw, gear, lobe, vane) and reciprocating pumps (piston, plunger, diaphragm), plus peristaltic hose pumps.
When should I use a positive displacement pump instead of a centrifugal pump?
Use a positive displacement pump for viscous liquids, for a steady flow against varying pressure, for accurate dosing, and for liquids that must not be sheared. Use a centrifugal pump for large flows of thin liquids.
Can a positive displacement pump run against a closed valve?
No. It will keep building pressure until something fails, so a relief valve or equivalent protection is required on the discharge line.
How do I choose a positive displacement pump in Saudi Arabia?
Send us the fluid, viscosity, temperature, flow rate, pressure and solids content. We recommend the pump type and a suitable model, and can support installation and troubleshooting.
Get a Response Within 24 Hours
Send us the fluid, flow rate, pressure and site for your positive displacement pump. Call or WhatsApp +966 56 278 9535 or email sales@powerenergy.com.co. Power Energy is based in Jubail Industrial City and supplies industrial customers across Saudi Arabia and the GCC.