TORUS Recessed Impeller Pump

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TORUS Recessed Impeller Pump
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TORUS Recessed Impeller Pump
Design

• 1- protective wear element
• 2- thick, foot mounted casing with large passage
• 3- radial vaned open impeller
• 4- stuffing box/seal housing
• 5- shaft and sleeve
• 6- bearings
• 7- power frame

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TORUS Recessed Impeller Pump
Typical Service Characteristics

• up to 5 solids
• grit or other highly abrasive solids
• where severe clogging potential exists

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TORUS Recessed Impeller Pump
Main Applications

• grit
• primary sludge
• scum

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Essential Requirements for Recessed Impeller
Pumps on Grit Sludge Services

• solids handling capability/non-clogging
• protection of casing in area of maximum wear -
  sacrificial wear element
• wear resistant materials of construction
• mechanical design for durability and ease of
  maintenance
• hydraulic efficiency

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TORUS Recessed Impeller Pump
Key Features To Specify

• sacrificial replaceable wear element
• casing wall thickness (typically 1/2 to 1
  depending on pump size)
• hard metal construction of all wet-end components
  (typically 550 BHN min. hardness)
• back pullout powerframe

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Vortex Flow Patterns - Radial Vane Impeller
Predetermined Area of Maximum Wear - flow from
open radial vanes is directed towards the area
around the impeller periphery. SACRIFICIAL WEAR
ELEMENT HERE.
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Vortex Flow Patterns - Cup Type Impeller

• Predetermined Area of Maximum Wear - flow from
  impeller is directed at front of casing.
  SACRIFICIAL WEAR ELEMENT HERE.

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Vortex Flow Patterns - Cup Type Impeller
Soft babitting material used to secure hard metal
impeller on shaft
Cup type impeller with non-machined babitted bore
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EDM Process for Milling Keyways in Hard Metal
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Torus VS Wemco Comparison of 4x15 Models

• Foot mount VS overhung casing

• Rugged powerframe and generous shaft diameter

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Torus VS Wemco Comparison of Impellers
Semi-recessed cup type impeller
Fully recessed radial vaned impeller
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• HG Offers the Best Fits for the Application
• Fifteen XR Sizes Ensures Best Fit vs. Six C
  Sizes
• One misapplication of a vortex pump is to
  apply too large a pump for the flow conditions.
  Excessive wear can occur as a result of internal
  recirculation when operating to the left of the
  performance curves BEP.
• The Torus radial vane impeller is a trimmable
  impeller which allows greater design flexibility
  and the ability to correct for future or changing
  conditions - The cup-type impeller cannot be
  trimmed.

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Vortex Pump Impeller Styles
Cup type impeller
Radial vane impeller
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Worn Wemco Volute and Impeller
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TORUS Recessed Impeller Pump

• New York City DEP trial
• Bowery Bay W.W.T.P., primary sludge and grit

Inspection photos after 28,000 hours
No sign of scouring or wear on front of casing
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TORUS Recessed Impeller Pump
Worn TORUS Wearplate and Impeller
Wear element absorbed brunt of wear
Wear restricted to these two replaceable parts
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TORUS Recessed Impeller Pump

• Hunts Point W.W.T.P., New York City Primary
  Sludge Grit

No scouring on front of casing
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TORUS Recessed Impeller Pump
New York City DEP trial - Bowery Bay
W.W.T.P. Primary sludge and grit

• wear concentrated at root of vane
• no reduction in vane thickness
• vane thickness well preserved

• pump out vanes slightly worn but still fully
  functional
• pattern number still fully visible

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TORUS Recessed Impeller Pump

• Replaceable wear element

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TORUS Recessed Impeller Pump

• Back pull out feature

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TORUS Recessed Impeller Pump
Smiths Falls W.W.T.P.

• Grit Slurry Pumps XR3-10

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TORUS Recessed Impeller Pump
Philadelphia, PA - Southwest W.W.T.P.

• Vertical Cantilever Primary Sludge Pumps

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TORUS Recessed Impeller Pumps

• Philadelphia, PA - Northeast W.W.T.P. - Scum
  Pumps - XR6-12

Nansemond, VA W.W.T.P. Scum Pumps - RS3-8-10
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TORUS Recessed Impeller Pump
Goshen, IN W.W.T.P.
Grit Cyclone and Classifier

• Grit Pumps - XR4-10

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TORUS Recessed Impeller Pump
Philadelphia, PA - Northeast W.W.T.P.

• 22 new XR6-12s in Digester Pump gallery

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TORUS Recessed Impeller Pump
Philadelphia, PA - Southwest W.P.C.P. - Digester
Sludge Pumps
Original non-clog pump
One of 53 new TORUS pumps
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TORUS Recessed Impeller Pump
Wisconsin Tissue Mills - Menasha, WI
Mark Weise, Plant Engineer with XR4-10
Recycled Paper Plant - Effluent Treatment Project
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TORUS Recessed Impeller Pump
Wisconsin Tissue Mills - Menasha, WI

• XR4-10 pumping to Belt Presses