Axial and Mixed Flow Pumps
Large volumes of water, moved continuously and fast. That’s what you get with Patterson Axial and Mixed Flow Pumps. This design delivers high capacity at low to medium heads with outstanding efficiency. These heavy-duty performers are widely used for flood control, irrigation and drainage projects, large scale primary water supplies, industrial process work, power plant condensing and other circulating systems. Municipalities the world over rely on these pumps to protect lives and property in the event of massive runoff or storm surges.
These pumps generally operate in a submerged state with suction entrances flooded. Horizontal units are installed with a positive suction head. Capacities range from 2,000 to 500,000 gpm with heads to 60 ft per stage, and bowl sizes from 12 in. to 84 in.
These pumps consist of a durable cast bowl assembly, an outer column and discharge elbow; shaft and shaft cover tube; floor plate; and motor mounting stand. The axial flow propeller or mixed flow impeller is positioned in its individual impeller housing just above the suction bell and close to the pump inlet. Water enters the pump through the suction bell, is discharged by the impeller into a guide vane section or diffuser, and then is pumped through the outer column to the discharge connection of the pump elbow.
A special configuration has an open line shaft for pumping relatively clear products. Patterson can also provide 'pull out' designs to simplify maintenance. The design permits removal of the entire bowl assembly without disturbing either discharge or floor plate connections.
Non-threaded-type line shaft couplings have keys and thrust rings. Line shaft bearings are conservatively spaced. The bowl shaft is ASTM A276 Type 416 SS, and the pump bowl diffuser is a single piece casting.
Each of these pumps is specially designed and built to individual customer requirements. These pumps are exhaustively tested with the aid of our in-house test laboratory.