Clean Liquids This pump is commonly used for chemical and water solutions, as well as molten salts, molten metals, mercury, and explosive liquids. Open impellers are used for most services, including viscous liquids. Enclosed impellers are used on high head applications. Replaceable wear rings are optional.
Top Suction This design is used primarily for handling entrained air, gaseous liquids, high vapor pressure liquids, flotation, and skimming. Pumps with open, enclosed, or slurry type impellers are used as required.
Double Suction This design is used for high flow, high head services. They require less NPSH than single suction pumps. Double suction balances axial thrust and double volute balances radial forces. This example shows a double suction in combination with a double volute.
Double Volute This design balances radial forces within the pump casing and combines the flow into one outlet. This provides a more efficient operation than the older, dual discharge design. These pumps are available in clean liquid and light slurry designs.
Slurries Slurries require specifically designed pumps. The impellers and casings have large passageways and liberal clearances. Impellers repelling vanes are added to reduce wear and recirculation. Heavy wall thickness on the wearing parts provides for longevity. Suction and hub disc liners are available.
Non-Clogging This design offers a higher solids handling efficiency than the recessed impeller or torque-flow pump, and is therefore more energy efficiency. This casing and impeller configuration allows for larger solids handling due to its larger passageways. Single, double, and triple impeller vane designs are available.
Fully Lined Replaceable casing liners are made from various hard metal alloys or Refrax®. The Refrax® lined slurry pump has a silicon carbide casing liner and a solid silicon carbide impeller, both of which are next to diamond in hardness. Refrax® is chemically inert to most liquids and is used in highly abrasive applications.
Dual Discharge This design is the forerunner of the modern double volute configuration. It is also less efficient. In this design the two separate discharge outlets balance the radial forces.
