Screw Pumps
by
Lakeside Equipment Corporation

Lakeside Screw Pumps are an efficient means of lifting large quantities of water or wastewater at low heads.  For municipal wastewater treatment plants, screw pumps offer a variety of applications ranging from return activated sludge to stormwater pumping.

Lakeside Screw Pumps are widely accepted by engineers because of their proven design and trouble-free operation.  Lakeside has been manufacturing screw pumps for more than four decades and has installed over 1,500 screw pumps.  Lakeside offers both open and enclosed screw pumps for additional flexibility.  Our bearing design has been so successful that others have attempted to copy it!

Lakeside's screw pumps, which are patterned after the Archimedian screw, consist of a tube with spiral flights set in an inclined trough.  The entire assembly consists of the spiral screw, an upper bearing, a lower bearing and a drive arrangement.  With sizes ranging from a 12-inch diameter to a 12-foot diameter and capacities from 150 GPM to over 55,000 GPM, a Lakeside Screw Pump may be the solution to your pumping application.

.
Why Use a Screw Pump?

The use of Screw Pumps in wastewater treatment plants has gained wide acceptance because of their efficiency in handling large volumes of liquid at relatively low lifts.  The overall advantages are:

A.    The Screw Pump has the ability to handle variable capacity with a simple constant speed drive.
B.    The Screw Pump operates at or above 70% efficiency for 2/3 of its operating capacity.
C.    There is no increase in pumping head caused by deep influent wells which are required for centrifugal pumps.
D.    There is less head required with a Screw Pump which means lower horsepower because there are no friction losses
        created by pipe, valves, and fittings.
E.    The Screw Pump is a true non-clog operation; pre-screening is not required.
F.    The simplicity of the Screw Pump installation provides reliable operation with little operator attention.
 
 
 

Excerpts from
"The Rebirth of Archimedes' Ancient Pump"
by
William L. Berk



 
 
 
 
 
 

36" Open Screw Pumps
Downingtown, PA
24" Closed Screw Pumps
Christiana, PA
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Open screw pumps are normally placed into a concrete, semicircular "open" trough.  The trough may be constructed at an angle of inclination of 22 to 40 degrees.  The screw pump itself is used for placing the grout in the trough.   Open screw pumps are the most economical screw pumps available.		 .
Enclosed screw pumps essentially utilize the same operating principles as open pumps but are enclosed in a tube rather than an open trough.  Lakeside offers two models: one with a rotating outer tube and one with a stationary outer tube as pictured above.  Maximum angle is 45 degrees.

 

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Before You Invest in a Screw Pump, Check for the Following Features:


Does your screw pump include:
LAKESIDE
Brand X
Minimum 3/8" wall torque tube
YES
?
Machining of  screw after fabrication
YES
?
Deflection calculated with water load
YES
?
Self-aligning dual upper bearing
YES
?
Split upper bearing housing
YES
?
Positive upper bearing/shaft lock
YES
?
Self-aligning lower bearing
YES
?
Bronze bushed lower bearing
YES
?
Sealed lower bearing
YES
?
Visual lower bearing grease line
YES
?
Lubricated expansion surface on lower bushing
YES
?
Made in the United States (including spare parts)
YES
?
One piece, continuously welded, die formed flights
YES
?

Lakeside doesn't build all of the Screw Pumps, but they certainly build the best.

L
For more information please request:

 
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