Rubber Lobe Pumps
KRL Rubber Lobe Pump
Rubber covered lobe rotors for liquid with lumps fibre and gas.
View specifications →Rubber Lobe Pumps
Sludge Lobe Pump
The same rubber covered lobe design, supplied and sized for sludge: thick, abrasive and full of things that block other pumps.
Overview
What This Pump Does
The sludge lobe pump is the KRL rubber lobe pump configured for sludge service. Body material is cast iron or stainless steel and the rotors are rubber covered, which suits liquid that carries grit, fibre and lumps.
It is used in wastewater, chemical and oil applications, with smooth pumping action from the large bucket geometry and short flow path through the pump.
- Rubber covered rotors for abrasive sludge
- Cast iron or stainless steel body
- Reversible operation without restriction
- Self priming to a maximum of 8.5 m
Key Benefits
Why Sludge Plants Specify This Pump
Handles What Sludge Contains
Big lumps, fibre and hair pass through instead of wrapping around a rotating part.
Service Without A Crane
Wear parts are replaced in place, with no need to disassemble the piping or lift the machine.
Fits Existing Pump Rooms
Compact construction takes a fraction of the area a screw pump of similar duty occupies.
Recovers After A Dry Line
Self priming to a maximum of 8.5 metres, which suits intermittent sludge transfer.
Application Scenarios
Where It Is Installed
Thickened Sludge Transfer
Moving thickened sludge between tanks or out to a tanker.
Dewatering Feed
Feeding a belt press or centrifuge at a controlled rate.
Digester Duty
Handling gas liquid mixtures that would air lock a centrifugal pump.
Who It Is For
- Municipal wastewater works
- Industrial effluent plants
- Biogas and digester operators
- Contractors specifying sludge handling equipment
Problems It Solves
The sludge pump is always blocked
A short wide flow path plus reversible running clears material that stops other pump types.
Maintenance needs the line broken
In situ replacement of wear parts avoids cutting pipework for every service.
Abrasive wear destroys the pump
Wear is concentrated in rubber covered rotors and wear plates that are designed to be replaced.
Technical Features
How It Is Built
- Rubber covered rotors for abrasive sludge
- Cast iron or stainless steel body
- Reversible operation without restriction
- Self priming to a maximum of 8.5 m
- Separated wetted sealing cavity
- Compact footprint against an equivalent screw pump
Specifications
Technical Data
Send dry solids percentage, particle size and the flow. Sludge duty is defined by what is in the liquid as much as by how much of it there is.
- Rubber covered rotors for abrasive sludge
- Cast iron or stainless steel body
- Reversible operation without restriction
- Self priming to a maximum of 8.5 m
- Separated wetted sealing cavity
- Compact footprint against an equivalent screw pump
Materials And Process
What Goes Into Every Unit
Materials
- Cast iron body
- Stainless steel body option
- Rubber covered rotors
- Replaceable wear plates
Manufacturing And Assembly
- Casting and machining of the body
- Rotor covering and assembly
- Clearance setting and test run
- Packing and documentation
Quality Control
- Clearances checked at assembly
- Running test before dispatch
- Factory acceptance test record issued
Customization Options
- Body material for the duty
- Drive and reduction for the required flow
- Connection size and orientation
- Wear part spares package
Compared With Other Options
| KRL rubber lobe pump | The same machine. This listing is the sludge duty configuration and sizing. |
|---|---|
| Progressing cavity pump | A screw pump handles higher viscosity with lower pulsation, but needs more space and longer to service. |
Use Guide
Running A Sludge Pump Without Surprises
Size On Solids
Dry solids and particle size drive the selection more than flow does.
Plan In Place Service
Keep clearance at the cover so the rotor set can come out without moving pipework.
Fit Over Pressure Protection
Sludge lines block. Relief protection stops a blockage becoming a pump failure.
Hold A Wear Kit
Keep one set of rotors and wear plates on site so a change never waits for shipping.
Answers
Sludge Lobe Pump FAQ
What solids can it pass?
Mixed gas, liquid and particles including big lumps, fibre and hair.
Is it the same as the KRL pump?
Yes, the same rubber lobe design, supplied and sized for sludge duty.
How long do wear parts last?
It depends on abrasives and hours. What matters operationally is that they change in place, so the swap fits in a shutdown.
Can it lift from a wet well?
Yes, self priming to a maximum of 8.5 metres depending on the suction arrangement.
Cast iron or stainless?
Cast iron for general sewage sludge, stainless where the liquid is chemically aggressive.
Related Equipment
Related Equipment From The Same Line
The equipment that usually appears on the same treatment works order.
Progressing Cavity Pumps
SKPG Progressing Cavity Pump
Single screw pump for viscous media with or without solids.
View specifications →
Submersible Aerators And Mixers
Submersible Mixer
Mechanical mixer for sludge tanks and other liquid volumes.
View specifications →
Submersible Aerators And Mixers
SKCB Submersible Aerator
Self priming aerator combining pump blower and gas liquid mixer.
View specifications →Need Sludge Lobe Pump Sized For Your Duty Point
Send dry solids, particle size and flow and we will size the pump and the wear part package.