Peristaltic And Dosing Pumps
SK165 Peristaltic Pump
Tube pump for analytical instruments and feeding equipment.
View specifications →Peristaltic And Dosing Pumps
Tube Pump With Stepper Motor
The same tube head driven by a stepper motor, so your controller commands a volume rather than a rate.
Overview
What This Pump Does
This build pairs the SK165 tube head with a stepper motor. Because a stepper turns in counted steps, the delivered volume becomes a function of commanded steps once the tube is calibrated.
Tube thickness is 1 mm or 1.6 mm, maximum tube size is 4.8 mm and maximum speed is 200 rpm, with maximum flow of 165 ml per minute.
| Maximum of tube | 4.8mm |
|---|---|
| Maximum speed | 200 rpm |
| Maximum flowrate | 165ml/min |
Key Benefits
Why Instrument Builders Choose The Stepper Version
Volume By Command
Counted steps translate directly into delivered volume, which is what a sampling or reagent sequence needs.
Fine Rate Control
Step level control gives smooth low rates as well as the full 165 ml per minute.
No Wetted Mechanism
The liquid still only touches the tube, so chemical compatibility is unchanged.
Integrates With Your Controller
The pump is driven by your machine controller rather than a fixed speed motor.
Application Scenarios
Where It Is Installed
Analytical Sequences
Drawing measured sample and reagent volumes inside an instrument.
Laboratory Automation
Repeatable small volume transfers under software control.
Precision Chemical Feed
Dosing sequences that change rate during a production cycle.
Who It Is For
- Instrument and analyser manufacturers
- Laboratory automation builders
- Machine builders needing dosed volumes
- Engineers replacing a fixed speed dosing pump with a controlled one
Problems It Solves
A rate is not a volume
Timing a fixed speed pump is approximate. Counted steps deliver a volume directly.
Low rates are unstable
Stepper control holds smooth movement at rates where a normal motor would stall or surge.
Integration is awkward
Driving the pump from the machine controller removes a separate speed controller from the design.
Technical Features
How It Is Built
- SK165 tube head with stepper motor drive
- Tube thickness 1 mm or 1.6 mm
- Maximum tube size 4.8 mm
- Maximum speed 200 rpm
- Maximum flow 165 ml per minute
- Step level control from the host controller
Specifications
Technical Data
Published data for the stepper build. Volume per step depends on the tube fitted, so calibrate after installation.
| Maximum of tube | 4.8mm |
|---|---|
| Maximum speed | 200 rpm |
| Maximum flowrate | 165ml/min |
Materials And Process
What Goes Into Every Unit
Materials
- Tube compound selected for the liquid
- Roller head assembly
- Stepper motor and drive board
Manufacturing And Assembly
- Head and motor assembled and aligned
- Tube fitted and flow verified
- Step to volume check on the bench
- Packing with spare tubes
Quality Control
- Step response checked at assembly
- Delivered volume verified before dispatch
- Test record available with the order
Customization Options
- Tube compound and bore
- Motor and driver interface
- Mounting for instrument or panel
- Cable and connector arrangement
Compared With Other Options
| Standard SK165 tube pump | Same wetted path. The stepper version adds counted volume control for instruments and automation. |
|---|---|
| Micro gear pump | A gear pump gives smoother continuous flow on clean liquid, but the tube pump keeps the liquid out of the mechanism entirely. |
Use Guide
Integrating A Stepper Driven Pump
Calibrate Steps To Volume
Measure delivered volume per commanded step on the installed tube and liquid, then store the factor.
Recalibrate After Tube Changes
A new tube changes the factor slightly. Build recalibration into the change procedure.
Limit Speed For Tube Life
Running below maximum speed extends tube life without necessarily reducing throughput.
Handle Tube Wear In Software
Track cumulative revolutions so the controller can prompt a tube change before accuracy drifts.
Answers
Tube Pump With Stepper Motor FAQ
How precise is the dosing?
Precision comes from counted steps against a calibrated volume per step. Calibrate on the installed tube and liquid.
Who supplies the controller?
The pump is driven by your machine controller, which is what makes step level dosing possible.
What is the maximum flow?
165 ml per minute at up to 200 rpm with a maximum tube size of 4.8 mm.
Does tube wear affect accuracy?
Yes, gradually. Track revolutions and change the tube on a schedule rather than after a failure.
Can it run dry?
Yes, without damage.
Related Equipment
Related Equipment From The Same Line
Other tube pump builds and the small gear pump for smooth continuous flow.
Peristaltic And Dosing Pumps
Tube Pump
The SK165 head supplied as a general purpose tube pump.
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Peristaltic And Dosing Pumps
Dosing Pump
Peristaltic dosing build of the SK165 for chemical feed.
View specifications →
Micro Gear And Magnetic Drive Pumps
Small Gear Pump
Compact magnetic drive gear pump for machine mounted duty.
View specifications →Keep Reading
Industries Guides And Solutions
Need Tube Pump With Stepper Motor Sized For Your Duty Point
Send the volumes you need to dose and the controller interface, and we will confirm the build.