Rotary Pumps offer alternative to centrifugal pumps.

Press Release Summary:

Using gear and lobe principles, positive displacement pumps provide near-constant flow rate regardless of changes in system pressure or viscosity. They handle fluids with viscosities from 28 to 2,000,000 SSU and offer reversible direction of flow. Internal gear pumps offer capacities from 1.5 to 1,500 gpm at pressures to 250 psi. Rotary lobe pumps utilize non-contacting lobes in bi-wing and multi-lobe designs. They offer capacities to 820 gpm at pressures to 400 psi.

Original Press Release:

Viking's Rotary Positive Displacement Pumps Offer an Alternative to Centrifugal Pumps

Viking Pump's rotary positive displacement pumps, using gear and lobe principles, offer an alternative to centrifugal pumps in applications where system pressure or fluid viscosity fluctuates. In comparison with centrifugal pumps where flow rates often change and efficiency is lost, Viking positive displacement pumps provide a near-constant flow rate with minimal efficiency change, regardless of changes in system pressure or viscosity. Viking's high NPSH® capabilities keep fluid moving with less chance of cavitation in processes where a suction lift is required or where a high vapor pressure fluid is being pumped. And, while centrifugal pumps can handle fluids to about 2,500 SSU (550 cSt) viscosity, Viking pumps can handle fluids from 28 to 2,000,000 SSU (1- 440,000 cSt) viscosity. Viking pumps also feature low shear, reversible direction of flow, low pulsation and high mechanical efficiency. Available in internal or external gear styles, Viking's gear pumps utilize a drive gear and driven gear that un-mesh to draw fluid in and re-mesh to force fluid out. Viking's extensive line of internal gear pumps is available in stainless steel, steel or iron, and offers capacities from 1.5 to 1,500 gpm (0.3 to 340 m³/hr) at pressures to 250 psi (17 bar). For hazardous fluids and zero-emission applications, the Viking Mag Drive® sealless internal or external gear pumps eliminate shaft leakage completely. Viking's rotary lobe pumps utilize non-contacting lobes in bi-wing and multi-lobe designs. Viking's rotary lobe pump lines feature both sanitary/hygienic and industrial models ideal for lower-shear or higher-pressure applications where cleanability or periodic dry-running is required. Constructed of stainless steel, the lobe pumps offer capacities to 820 gpm (184 m³/hr) at pressures to 400 psi (27 bar). Viking Pump, a unit of IDEX Corporation, designs and manufactures rotary positive displacement pumps for use in every major market, in thousands of applications. Drawing on more than 90 years of experience and an extensive worldwide distributor network, Viking offers its customers comprehensive service and application expertise unmatched in the fluid handling industry. For more information on Viking's extensive line of pumps, call (319) 266-1741, fax (319) 273-8157, e-mail, visit, or mail Viking Pump Inc., 406 State Street, Cedar Falls, IA USA 50613-0008.

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