KK350 Stepper-Driven Peristaltic Pump
Wide-Range Fluid Transfer with Fast Tubing Replacement
The Kamoer KK350 is a compact, four-roller peristaltic pump designed for accurate speed control and stable fluid transfer in OEM equipment. Driven by a stepper motor, it provides a wide reference flow range of 0.01–510 mL/min and accommodates tubing with internal diameters from 0.8 to 4.8 mm.
The KK350 features a flip-top pump head for rapid tubing replacement and a spring-loaded compression mechanism that helps reduce shear forces on the tubing. It is suitable for analytical instruments, bioreactors, dental equipment, ultrasonic surgical systems, laboratory equipment, and other automated fluid-handling devices.
Key Features
Wide Flow Range
The KK350 covers a reference flow range of 0.01–510 mL/min through different tubing sizes and motor speeds.
Actual flow depends on the tubing size and material, motor speed, liquid properties, outlet pressure, tubing condition, and operating environment.
Fast Tubing Replacement
The flip-top pump head provides quick access to the tubing, allowing operators to replace the pump tubing without complex disassembly. This simplifies routine maintenance in instruments where tubing must be changed regularly.
Spring-Loaded Compression Mechanism
The spring-loaded structure maintains controlled tubing compression and helps reduce the shear force generated during operation. This design can reduce unnecessary tubing stress and support longer tubing service life under suitable operating conditions.
Because the spring is a wear component, it should be inspected and replaced periodically according to the actual operating frequency and load.
Supports Multiple Tubing Sizes
The KK350 accommodates tubing with a wall thickness of 1.6 mm and internal diameters from 0.8 to 4.8 mm.
| Tubing Code |
Internal × External Diameter |
Reference Flow at 400 rpm |
| 13# |
0.8 × 4.0 mm |
17 mL/min |
| 14# |
1.6 × 4.8 mm |
56 mL/min |
| 19# |
2.4 × 5.6 mm |
115 mL/min |
| 16# |
3.2 × 6.4 mm |
190 mL/min |
| 40# |
4.0 × 7.2 mm |
270 mL/min |
| 25# |
4.8 × 8.0 mm |
350 mL/min |
Both silicone and BPT tubing options are available. Chemical compatibility and tubing life should be verified using the actual liquid, temperature, pressure, speed, and duty cycle.
Adjustable Tubing Clamp
The integrated tubing clamp has inner and outer positioning options for different tubing sizes:
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For tubing with an internal diameter of 0.8–2.4 mm, the inner position is preferred.
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For tubing with an internal diameter of 2.4–4.8 mm, the outer position is preferred.
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Tubing with internal diameters of 2.4 and 3.2 mm can be used in either position, depending on the installation.
This adjustable design allows one pump head to accommodate a broad range of tubing sizes.
Durable Pump Head Structure
The KK350 uses:
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Engineering-plastic pump housing
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PET rollers
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Stainless-steel springs
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Stainless-steel roller shafts
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Deep-groove bearing transmission
These components provide stable mechanical operation in compact OEM equipment.
Stepper Motor Control
The stepper motor enables controlled speed and direction adjustment when paired with a suitable external driver. This makes the pump suitable for equipment requiring variable flow, repeatable liquid transfer, or programmed operating cycles.
Customization Options
Available customization options include:
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Flip-cover microswitch detection
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Customized pump-head colors
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Tubing configurations with other wall thicknesses
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Standard-pressure and Plus-pressure versions
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Inner or outer tubing-clamp positions
Final configurations should be confirmed according to the required tubing, pressure, flow, and installation conditions.
Typical Applications
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Analytical instruments
-
Bioreactors
-
Laboratory research equipment
-
Biochemical analyzers
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Dental implant equipment
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Ultrasonic bone surgery systems
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Medical diagnostic equipment
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Environmental monitoring instruments
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Washing and disinfection equipment
-
Industrial fluid-handling systems
Technical Specifications
| Parameter |
Specification |
| Product model |
KK350 |
| Pump type |
Peristaltic pump |
| Motor type |
Stepper motor |
| Rated voltage |
24 V |
| Power |
24 W |
| Reference flow range |
0.01–510 mL/min |
| Continuous-operation reference flow |
Up to 350 mL/min at 400 rpm |
| Intermittent-operation reference flow |
Up to 510 mL/min at 600 rpm |
| Rotor configuration |
Four rollers |
| Tubing materials |
Silicone or BPT |
| Tubing internal diameter |
0.8–4.8 mm |
| Tubing wall thickness |
1.6 mm |
| Weight |
Approx. 480 g |
| Operating temperature |
-5–45°C |
| Reference noise level |
≤60 dB |
| Motor reference service life |
6,000 hours |
| Silicone tubing reference service life |
200 hours |
| BPT tubing reference service life |
1,000 hours |
| Control method |
External stepper motor driver |
The noise value was measured at 400 rpm with the product positioned 50 cm from the sound-level meter in a room with an ambient noise level of 35 dB.
Reference Flow by Speed
Reference values for tubing with a 1.6 mm wall thickness:
| Tubing ID |
Volume per Revolution |
100 rpm |
400 rpm, Continuous |
600 rpm, Intermittent |
| 0.8 mm |
0.04 mL/rev |
4.3 mL/min |
17 mL/min |
26 mL/min |
| 1.6 mm |
0.14 mL/rev |
14 mL/min |
56 mL/min |
84 mL/min |
| 2.4 mm |
0.29 mL/rev |
29 mL/min |
115 mL/min |
175 mL/min |
| 3.2 mm |
0.47 mL/rev |
47.5 mL/min |
190 mL/min |
285 mL/min |
| 4.0 mm |
0.67 mL/rev |
67 mL/min |
270 mL/min |
405 mL/min |
| 4.8 mm |
0.85 mL/rev |
85 mL/min |
350 mL/min |
510 mL/min |
These values were measured using pure water at 20°C, standard atmospheric pressure, and zero outlet pressure. They are provided for reference only. Real-liquid testing is recommended before final selection.
Selection and Safety Notes
Tubing compatibility should be confirmed through chemical compatibility data or immersion testing. Incorrect tubing selection may cause premature deterioration, cracking, or leakage.
The recommended operating environment should not exceed 45°C or 70% relative humidity, non-condensing. Excessive loading may shorten the service life of the pump.
Before opening the pump head or replacing the tubing, disconnect the power, release pressure, and drain the fluid path. Appropriate personal protective equipment should be used when transferring hazardous or corrosive liquids.
About Kamoer
Founded in 2005, Kamoer specializes in reliable micro-pump and precision fluid-handling solutions. We support equipment manufacturers with pump selection, tubing evaluation, customized configurations, control integration, and testing under actual operating conditions.
Contact Kamoer with your liquid, target flow rate, operating pressure, duty cycle, tubing requirements, control method, and installation space to receive a suitable KK350 configuration.
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