DBS manufactures clarifier and thickener drives that are direct bolt-in replacements for drives built by many other companies such as Dorr-Oliver, Eimco, Envirex, FMC, National Hydro, Walker Process and others.
DBS retrofit drive units are an economical solution to renovating an old clarifier or thickener. In fact, the total cost of replacing an old drive unit with a new DBS drive may be less than the cost of rebuilding the old drive. With a new DBS drive, you get the best warranty in the industry, lower maintenance costs, higher reliability, and DBS "customer first" service.
Bolt-in retrofits are simply new DBS drives that are built to "look like" and directly replace a gearbox built by another manufacturer. DBS retrofit drives are dimensionally identical to the original manufacturers' gearbox so they "bolt right in" without any modification to the existing mechanical components like the bridge, drive cage or drive shaft.
DBS retrofit drive units are easy to install, and they upgrade the clarifier or thickener to modern standards with forged alloy steel gearing, permanently lubricated pinion drive gearbox, and an accurate, dependable torque gauge — features that add up to lower maintenance cost and longer life.
DBS has replaced nearly all major manufacturers' drive units:
| Dorr-Oliver |
Horsburgh-Scott |
National-Hydro |
Amwell |
Eimco |
| Denver |
Walker Process |
Peabody-Wells |
Envirex |
FMC |
DBS also makes bolt-in replacements for rotary distributor center mechanisms. DBS rotary distributor center mechanisms feature a rugged "top running" bearing that is easy to access and service. DBS center mechanisms can directly replace an existing mechanism and add modern features such as motor powered rotation for high dousing and variable flow applications. DBS rotary distributor center mechanisms are covered by a 5-year "top to bottom" warranty.
DBS has replaced major manufacturers' rotary distributor center mechanisms such as:
| General Filter |
Walker Process |
Dorr-Oliver |
Eimco |
DBS Model No. D60-DH2
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Features: Bolt-in retrofit. Totally enclosed oil bath and grease lubricated. Positive torque overload protection system. Forged steel precision turntable main gear-bearing. 10-year warranty on main gear-bearing. Reversible. Variable speed.
Installation Date: 1987
Application: 120 foot diameter dole water slurry thickener, wood fiber industry
Replacement for: Dorr-Oliver 96S2
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DBS Model No. D42-BE
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Features: Bolt-in retrofit. Totally enclosed oil bath and grease lubricated. Mechanical torque overload protection system. Large accurate torque gauge. Forged steel precision turntable main gear-bearing. 10-year warranty on main gear-bearing.
Installation Date: 1988
Application: 100 foot diameter primary municipal wastewater treatment and 110 foot diameter secondary municipal wastewater treatment clarifiers.
Replacement for: Dorr-Oliver 48S1
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DBS Model No. D60-DH
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Features: Bolt-in retrofit. Totally enclosed oil bath and grease lubricated. Positive torque overload protection system. Forged steel precision turntable main gear-bearing. 10-year warranty on main gear-bearing. Reversible. Variable speed.
Installation Date: 1997
Application: 110 foot diameter copper concentrate thickener
Replacement for: Dorr-Oliver 80S2
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DBS Model No. D60-DF
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Features: Bolt-in retrofit. Totally enclosed oil bath and grease lubricated. Positive torque overload protection system. Large accurate torque gauge. 4-20 mA torque output signal. Forged steel precision turntable main gear-bearing. 10-year warranty on main gear-bearing. Reversible. Variable speed.
Installation Date: 1991
Application: 225 foot diameter pulp mill waste treatment secondary clarifier
Replacement for: Dorr-Oliver 80S2
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DBS Model No. D80-DH2
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Features: Bolt-in retrofit. Totally enclosed oil bath and grease lubricated. Positive torque overload protection system. Forged steel precision turntable main gear-bearing. 10-year warranty on main gear-bearing. Reversible. Variable speed.
Installation Date: 1990
Application: 200 foot diameter pulp & paper mill primary effluent clarifier
Replacement for: Dorr-Oliver 109S2
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DBS Model No. D42-BH-D42
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Features: Totally enclosed oil bath and grease lubricated concentric dual drive. Variable speed high power turbine drive. Reversible variable speed rake drive with positive torque overload protection and 4-20 mA torque output signal. Forged steel precision turntable main gear-bearings.
Installation Date: 1997
Application: 77 foot diameter lime softening water treatment clarifier
Replacement for: OEM Installation
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DBS Model No. D80-EH4
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Features: Bolt-in retrofit. Totally enclosed oil bath and grease lubricated. Positive torque overload protection system with 4-20 mA torque output signal. Forged steel precision turntable main gear-bearing. 10-year warranty on main gear-bearing. Reversible. Variable speed. Duplex oil filtration system. Oil Heater.
Installation Date: 1998
Application: 190 foot diameter pulp mill primary effluent clarifier
Replacement for: Eimco C108B2
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DBS Model No. D42-CH2
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Features: Bolt-in retrofit. Totally enclosed oil bath and grease lubricated. Positive torque overload protection system with 4-20 mA torque output signal. Forged steel precision turntable main gear-bearing. 10-year warranty on main gear-bearing. Reversible. Variable speed. Oil heater.
Installation Date: 1997
Application: 105 foot diameter paper mill primary effluent clarifier
Replacement for: Eimco C54B2
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DBS Model No. D42-BF
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Features: Bolt-in retrofit with condensate control option. Totally enclosed oil bath and grease lubricated. Positive torque overload protection system with large accurate torque gauge. Forged steel precision turntable main gear-bearing. 10-year warranty on main gear-bearing. Reversible. Variable speed.
Installation Date: 1996
Application: 90 foot diameter municipal wastewater primary clarifier
Replacement for: Dorr-Oliver 48S1
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DBS Model No. D42-BF
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Features: Bolt-in retrofit. Totally enclosed oil bath and grease lubricated. Positive torque overload protection system with large accurate torque gauge. Forged steel precision turntable main gearbearing. 10-year warranty on main gear-bearing. Factory torque tested.
Installation Date: 1999
Application: 70 foot diameter municipal wastewater secondary clarifier
Replacement for: Envirex H40 HT
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DBS Model No. S34-BF-L
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Features: Totally enclosed oil bath and grease lubricated. Positive torque overload protection system with large accurate torque gauge and 4-20 mA torque output signal. Forged steel precision turntable main gear-bearing. 10-year warranty on main gear-bearing. Reversible. Variable speed. 36" displacement heavy duty integral rake shaft powered lift. 4-20 mA rake elevation position transducer.
Installation Date: 1993
Application: 50 foot diameter pulp mill caustic recovery green liquor clarifier
Replacement for: Dorr-Oliver 48A
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DBS Model No. NSA2-30B
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Features: Bolt-in retrofit with optional elevation adjustment stand. Large gearbox service factor. Stainless steel back-curved high-efficiency rotor.
Installation Date: November 1999
Application: Flow through activated sludge with 4 to 6 hours retention time in a 27 feet (8.35 m) x 27 feet (8.35 m) x 15 feet (4.6 m) deep basin
Replacement for: Degremont 30 hp low-speed aerator
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DBS Model No. RD-28
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Features: Bolt-in retrofit. Heavy-duty precision bearing for combined thrust, moment, and radial loading. Bearing is "top running" and is safely away from damaging water and moisture. Bearing can be replaced without removing the distribution manifold, arms, and influent column. 5-year bearing warranty.
Installation Date: 1998
Application: 120 foot diameter trickling filter in a municipal wastewater treatment plant
Replacement for: Dorrco distributor Type KCA with 48 inch turntable bearing
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DBS Model No. MC-7
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Features: Bolt-in retrofit. Heavy-duty planetary gearbox with a mechanical variable speed reducer.
Installation Date: 1998
Application: Flocculation in a Walker Process Type LER-HP tank, size 39 feet x 84 feet x 11 feet deep
Replacement for: Philadelphia Gear Works drive unit Type A Size 675
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