Micro Gear And Magnetic Drive Pumps
Magnetic Pump
Seal free magnetic drive pump for hazardous and volatile liquids.
View specifications →Micro Gear And Magnetic Drive Pumps
SKQB Micro Pump
The base model of the magnetic drive micro gear family: precision low flow, no shaft seal, and flow that follows shaft speed.
Overview
What This Pump Does
The SKQB micro pump is a magnetic drive gear pump that uses positive displacement to deliver precise low flow. The motor drives the gear set through a magnetic coupling, so no shaft passes through the housing and there is no seal to leak or replace.
It is used in three ways: circulation through a closed circuit for heating, cooling, filtering, mixing, hydrating, degassing and system pressure control; metering of additives, coatings, lubricants, adhesives and solvents; and transfer duty that delivers liquid to a point of use without altering it.
| Applications include | ingredient dispense, point-of-use dispense, lubrication, sampling, additives, and sample preparation |
|---|---|
| Gears | PEEK |
Key Benefits
Why Instrument Builders Specify This Pump
No Shaft Seal
The magnetic coupling removes the leak path and the usual maintenance item on a small pump.
Flow Follows Speed
Fixed displacement per revolution turns a variable speed drive into a metering control.
Smooth Delivery
Gear pumps deliver near continuously, which matters when feeding an analyser or a coating head.
PEEK Gear Option
PEEK gears are available where metal to metal contact is unacceptable for the liquid.
Application Scenarios
Where It Is Installed
Closed Circuit Circulation
Heating, cooling, filtering, mixing, hydrating and degassing loops that run for long periods unattended.
Metering And Dispense
Ingredient dispense, point of use dispense, lubrication, additives and sample preparation.
Transfer And Sampling
Batch feed, waste extraction, fluid supply and hazardous liquid handling without changing the liquid.
Who It Is For
- Analytical instrument builders
- Machine builders adding lubrication or coating feed
- Laboratories preparing and dosing samples
- Process engineers running small circulation loops
Problems It Solves
Seals fail faster than the pump
On a small pump the shaft seal is the shortest lived part. Magnetic drive removes it completely.
Dose drifts with pressure
Positive displacement keeps flow tied to speed rather than to downstream conditions.
Pulsation upsets the measurement
Gear action gives smooth delivery, which keeps analysers and coating processes stable.
Technical Features
How It Is Built
- Magnetic drive external gear pump, no shaft seal
- Positive displacement, flow proportional to speed
- Precision low flow range
- PEEK gear option available
- Compact head for mounting inside equipment
- Suited to circulation, metering and transfer duty
Specifications
Technical Data
The performance table below is from the original SKQB data sheet. Send flow, pressure and the liquid so the correct head and gear material are selected.
| Applications include | ingredient dispense, point-of-use dispense, lubrication, sampling, additives, and sample preparation |
|---|---|
| Gears | PEEK |
| Model | Max Speed | Flowrate | Pressure | Frequency | Port size | |
|---|---|---|---|---|---|---|
| r/min | L/min | MPa | HZ | inch | ||
| SKQB8 | 2900rpm / 3300rpm | 3 L | 0.2 | 50Hz / 60Hz | 1/8” | |
| SKQB10 | 5 L | 0.25 | 1/8” | |||
| SKQB15 | 15 L | 0.3 | 3/8” | |||
| SKQB20 | 20 L | 0.4 | 3/8” |
Materials And Process
What Goes Into Every Unit
Materials
- Stainless steel pump head
- PEEK gears where metal gears are unsuitable
- Elastomers selected against the liquid
Manufacturing And Assembly
- Gear set matched and assembled
- Magnetic coupling fitted and checked
- Run test before packing
- Documentation with the order
Quality Control
- Gear clearance checked at assembly
- Flow verified before dispatch
- Test record available with the order
Customization Options
- PEEK or metal gears
- Fixed or variable speed drive
- Mounting arrangement for bench, cabinet or machine frame
- Supply voltage to suit the equipment
Compared With Other Options
| Peristaltic tube pump | A tube pump is better for aggressive chemicals and dry running. The gear pump gives smoother flow and handles higher pressure. |
|---|---|
| Diaphragm pump | A diaphragm pump pulses and has valves that can gas lock. A gear pump delivers continuously with no valves. |
Use Guide
Installing A Micro Gear Pump
Filter The Liquid
Gear pumps do not tolerate abrasive particles. Fit a suction filter suited to the liquid.
Avoid Dry Running
The gears rely on the liquid for lubrication. Protect against an empty suction line.
Calibrate Once Installed
Measure delivered volume against speed on the actual liquid and pressure, then use that curve for control.
Check Coupling Behaviour
If the magnets decouple under load, stop and remove the cause before restarting.
Answers
SKQB Micro Pump FAQ
How is flow controlled?
By shaft speed. Displacement per revolution is fixed, so a variable speed drive gives proportional control.
Can it run dry?
No. Without liquid the gears have no lubrication and the pump can be damaged quickly.
Are PEEK gears available?
Yes, where the liquid or the application rules out metal gears.
What applications is it used for?
Circulation, metering and transfer, including ingredient dispense, point of use dispense, lubrication, sampling, additives and sample preparation.
Is there any seal to maintain?
No dynamic seal. The magnetic coupling drives the gear set through a closed housing.
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View specifications →Need SKQB Micro Pump Sized For Your Duty Point
Send flow in millilitres per minute, the pressure and the liquid, and we will confirm the head and gear material.