Rubber Lobe Pumps
KRL Rubber Lobe Pump
Rubber covered lobe rotors for liquid with lumps fibre and gas.
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Industry Application
Pumps And Foam Control For Pulp And Paper Mills
Paper mills run hot, wet and foamy. The equipment here handles fibre laden stock, breaks the foam in washing systems and keeps hot circuits moving without destroying seals.
What Goes Wrong On This Duty
Fibre wraps around the impeller
Stock with fibre blocks conventional pumps. A rubber lobe pump has a short wide flow path and reversible operation to clear itself.
Foam carries liquid out of the washer
Mechanical foam breakers separate liquid from gas and return it, which is product that would otherwise leave the circuit.
Hot circuits destroy seals
Dryer and heat recovery circuits run above the range of standard pumps. Heat transfer pumps without a shaft seal remove the failure point.
What Buyers Ask For
- Pumps that pass fibre without blocking
- Wear parts that can be changed during a short shutdown
- Foam control that does not add chemicals to the circuit
- Equipment rated for continuous duty rather than intermittent
- Spares available years after the original order
Recommended Equipment
Stock Handling Foam Control And Hot Circuits
Positive displacement pumps for stock, foam breakers for washing systems and high temperature pumps for dryer circuits.
Rubber Lobe Pumps
Sludge Lobe Pump
The rubber lobe pump specified for sludge handling duty.
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Progressing Cavity Pumps
SKPG Progressing Cavity Pump
Single screw pump for viscous media with or without solids.
View specifications →Defoaming Machines
Defoaming Machine
DP series mechanical defoamer for open and closed vessels.
View specifications →Defoaming Machines
Foam Breaker
DP series foam breaker for closed fermenters and open pools.
View specifications →
Centrifugal Pumps
SKWR Horizontal Hot Water Pump
Horizontal pump for pressurised hot water circulation to 120 degrees.
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Centrifugal Pumps
SKWS High Temperature Centrifugal Pump
Horizontal pump rated for pressurised circulation to 240 degrees.
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High Temperature Pumps
Hot Oil Pump
Magnetic drive heat transfer pump for hot oil and hot water to 350 degrees.
View specifications →Typical Scenarios
Where The Equipment Sits
Stock And Sludge Transfer
Moving fibre laden stock and mill sludge without blocking or shearing the fibre.
Washing System Foam
Mechanical defoaming in the washing circuit, returning the separated liquid to the process.
Dryer And Heat Recovery Circuits
Hot water and thermal oil circulation at temperatures well above a standard pump limit.
How We Work
Specifying Mill Equipment
Stock Data
Consistency, fibre length and temperature. Consistency alone changes the pump family.
Duty And Continuity
Flow, pressure and whether the duty is continuous. Mill duty is hard on wear parts, so this matters.
Foam Assessment
Where foam forms, how stable it is, and whether the tank is open or closed decides the foam breaker version.
Shutdown Planning
Wear part change intervals aligned with the mill shutdown calendar, and spares held on site.
Delivery
What You Get With The Order
- Cast iron or stainless bodies with rubber covered rotors
- Wear parts replaced in place without dismantling pipework
- DP-F foam breakers for closed tanks and DP-K for open tanks
- High temperature pumps rated for hot water and thermal oil duty
- Spares packages sized to the shutdown interval
Answers
Pulp And Paper FAQ
What consistency of stock can the pumps handle?
Rubber lobe and progressing cavity pumps handle fibre laden liquid with solids. Send the consistency and fibre length and we will confirm the model.
Can the foam breaker be fitted to an existing tank?
Yes. DP-F mounts on a closed tank and DP-K is designed for an open tank or pool. Send the mounting connection and headspace.
How long do wear parts last?
It depends on abrasives and duty hours. The relevant point is that they change in place without lifting the machine, so the change fits inside a shutdown.
Which pump for a thermal oil dryer circuit?
The heat transfer line, which is magnetically coupled and rated to 350 degrees for hot oil duty.
Do you supply to mill standards?
Send the specification with the enquiry. Stainless pipe fittings are supplied to ANSI, ASTM, DIN, JIS, BS, ISO, GB, SH and HG standards.
Keep Reading
Guides For This Industry
Send The Stock Data And The Circuit Temperature
Consistency, flow and temperature decide the pump family before anything else is discussed.