DXP is proud to represent many world class suppliers for every type and class of positive displacement (PD) pumps. PD pumps are flow producing devices and are typically used to move higher viscosity or sheer sensitive fluids for any application and for any market. Complete pumps and spare parts are typically in stock at one of DXP’s distribution centers or at a local DXP service center.
DXP represents several world class suppliers for different types and classes of rotary gear pumps. Rotary gear pumps are generally used to pump clean fluids that are not suitable for a centrifugal pump due to viscosity or control reasons. Rotary gear pumps do not handle solids well and generally need the viscosity of the fluid to lubricate the driven and idler gears that otherwise would wear prematurely due to metal to metal contact. Rotary gear pumps use metallic and/or nonmetallic components depending on the application and are used in a wide range of markets and services.”
 |
DXP represents world class suppliers of rotary vane pumps. Vane pumps operate using self-adjusting vanes in the rotor that maintain close clearances with the stator. Vane pumps are self-priming and also have excellent run dry capability when using non-metallic vanes. Vane pumps are used in a wide range of oil & gas, chemical, marine, power and several other general industrial applications and markets and are available in both sealed and sealless designs.
 |
DXP represents several world class manufacturers of twin and 3 screw pumps. Screw pumps are preferred due to their reliability, quiet running and versatility and are applied in many markets such as hydrocarbon and chemical processing, food & beverage, Navy and commercial marine, crude oil transfer, multiphase, power generation, pulp & paper, hydraulic elevators and general machinery. Screw pumps can handle thinner liquids or liquids containing solids since the screws are timed preventing them from making physical contact.
 |
DXP represents several world class lobe pump suppliers and applies lobe pumps in multiple markets including food & beverage, pharmaceutical, biotechnology, chemical, municipal and other industrial markets. Typically lobe pumps are used in sanitary or ultraclean applications but they can also be applied when transporting various forms of sludge, bio-solids or greases. Unlike other rotary positive displacement pumps, lobe pump use timing gears to prevent the two rotors from contacting one another, allowing them to be more tolerant of solids and also to be more shear sensitive.
 |
DXP represents several world class suppliers of Progressive Cavity (PC) pumps. PC pumps are versatile since they can pump either thin or very viscous fluids and can handle abrasive solids. PC pumps are shear sensitive and available in sanitary (CIP capable) or industrial designs. Typical markets include municipal, food & beverage, oil & gas, chemical, pulp & paper and mining & minerals.
Learn More about Progressive Cavity Pumps
 |
DXP represents several world-class suppliers of Plunger and Piston style positive displacement pumps. These pumps use a plunger or a piston to displace a fluid in a cylinder and have the ability to create very high pressures that are necessary in a wide range of applications and markets. Typically plunger pumps are used for the higher pressure applications, in some cases achieving 10,000-30,000 psig.
 |
DXP represents multiple world class suppliers of air operated double diaphragm (AODD) pumps. AODD pumps are one of the more versatile types of positive displacement pumps since they are self-priming, shear sensitive, can run dry and are inherently explosion proof. AODD pumps require a compressed gas, normally air, to power the pump and are portable by design. AODD pumps are constructed using a wide range of metallic and nonmetallic materials and also an equally wide range of diaphragm elastomers, ball or flap check valves.
 |
DXP represents multiple manufacturers of sealless positive displacement pumps. Sealless refers to the absence of a dynamic seal where the pump shaft penetrates the pump casing. Sealless pumps are either the magnetically driven or canned motor designs. Hose pump designs are also inherently sealless. Sealless pumps are used for various reasons, but mostly when pumping volatile or toxic liquids where any amount of leakage cannot be tolerated.
 |
