US_

P_9

_RR

_111

1

I n n o v a t i o n

Simplicityis simply better

Rotorrake

Simplicityis simply better

Construction and PrincipleRotorrake

The Rotorrake is a robust chopping

unit using inline design. Knives and

stationary knives are pushed onto the

carrier shaft in an alternating

fashion. The stationary knives are fi xed

inside the casing. The rotating shaft

is directly driven via the drive and

bearing assembly. The Rotorrake with

its rough macerating effect allows for

high throughput capacities.

Solids laden fl uid is fed through the

Rotorrake. Separation of hard

particles is achieved by knife rotation

against stationary knives. Stones and

debris drop into the debris collector.

Reducible solids are chopped by

further knife rotation against the

stationary knives. Rotating knives and

stationary knives are reversible and

can be used from either side.

Rotorrake – designed for simple and

effective operation.

Advantages· Throughput up to 3,000 usgpm, depending on the model

· Rotorrake – compact, space-saving, single shaft design

· Variable fl ow direction – Adjustment by modifi cation of stationary knives

· Rotating shaft in oil fi lled bearing carrier

· Equipped with our standard Börger mechanical seal

· Quench chamber between fl uid and drive gear guarantees reliability

· Rotating and stationary knives can be used multiple times just by rotating them

· short direct passage

· robust rotating knives

· crescent shaped stationary knives

· machine with own bearing system and mechanical seal

· MIP design: Simply open the quick release cover and one single screw allows access to service parts.

The Rotorrake is designed modular andcan be used for various solids-reducingduties with reversible operating.

with parallelgeared electric motor

with hydraulic motor

with bearing carrier and bare shaft

Drive varieties

Reversible Direction of Flow

Combined UnitRotorrake and Rotary Lobe Pump

Driven via fl at belt

Boerger, LLC

2860 Water Tower Place

Chanhassen, MN 55317

USA

Toll Free 877-726-3743

Phone 612-435-7300

Fax 612-435-7301

america@boerger.com

www.boerger.com

US_

P_9

_RR

_111

1

The Rotorrake is used in a dual-stage Biogas plant in the

connecting pipe between the main digester and the secondary

digester. It is installed just before the Börger Rotary Lobe

Pump. In this plant several silages (Corn, Sorghum, Grass,

Rye) and dried chicken manure are used.

The fl ow rate is app. 55 usgpm.

TECHNICAL SPECIFICATIONS

Rotorrake 6000

Flow Rate 55 usgpm

Power 10 HP

Macerator Models/Performance Chart

RR 6000

RR 9000

200 600 950 1,350 1,750 2,400 usgpm

The Rotorrake is installed in the suction pipe of a pump for

digester circulation. In the circulation process occasionally

pigtails are formed, which frequently block the used centrifugal

type pumps. Then requiring manually cleaning which is extensive

and time consuming. With the installation of the Börger Rotorrake

blockages were eliminated. Another centrifugal pump – without

Rotorrake Technology– used in parallel, still suffers blockages

frequently. The throughput is app. 500 to 880 usgpm.

TECHNICAL SPECIFICATIONS

Rotorrake 6000

Flow Rate < 880 usgpm

Power 15 HP