Specifications

Complete specifications for PTFE magnetic stirrers. Items marked Customizable available upon request.

Type A (Rod · Rounded Ends)

Size	Model	Diameter×Length (mm)
A3×6	A06	3×6
A4×8	A08	4×8
A5×10	A10	5×10
A6×10	A10	6×10
A7×15	A15	7×15
A8×20	A20	8×20
A9×25	A25	9×25
A10×30	A30	10×30
A12×35	A35	12×35
A15×40	A40	15×40
A17×50	A50	17×50
A20×50	A50	20×50
A25×70	A70	25×70
A25×100	A100	25×100
A33×135	A136	33×135

Type B (Cylinder with Ring)

Size	Model	Diameter×Length (mm)
B3×6	B06	3×6
B4×8	B08	4×8
B5×10	B10	5×10
B6×15	B15	6×15
B7×20	B20	7×20
B8×25	B25	8×25
B9×30	B30	9×30
B10×40	B40	10×40
B12×55	B55	12×55
B13×80	B80	13×80
B16×100	B100	16×100
B24×148	B148	24×148

Type C (Ellipse/Polygon)

Size	Model	Diameter×Length (mm)
C1.5×9	C09	1.5×9
C3×6	C06	3×6
C3×10	C10	3×10
C4×10	C10	4×10
C5×10	C10	5×10
C6×15	C15	6×15
C7×20	C20	7×20
C8×25	C25	8×25
C9×30	C30	9×30
C10×40	C40	10×40
C13×50	C50	13×50
C16×100	C100	16×100
C35×115	C115	35×115

Type D/E/F/G · Special Types

Type	Size	Diameter×Length (mm)	Application
D Cross	D8×20	8×20	High-viscosity
D Cross	D10×30	10×30	High-viscosity
D Cross	D15×50	15×50	High-viscosity
E Gear	E8×20	8×20	Intensive/emulsification
E Gear	E10×30	10×30	Intensive/emulsification
E Gear	E15×50	15×50	Intensive/emulsification
F Triangle	F8×20	8×20	Vortex mixing
F Triangle	F12×50	12×50	Vortex mixing
F Triangle	F35×110	35×110	Vortex mixing
G Egg	G8×20	8×20	Large volume
G Egg	G10×30	10×30	Large volume
G Egg	G15×50	15×50	Large volume
G Egg	G35×115	35×115	Large volume
High-Temp	A10×30-HT	10×30	350℃ applications
ZL Export	ZL8×25	8×25	Export standard

Custom sizes and shapes available upon request.

📌 Customization Options:
• Magnet Strength: Standard / High-strength (5000~8000GS)
• Temperature Grade: Standard (-200℃~110℃) / High-Temp (-200℃~350℃)
• Custom shapes and sizes available — OEM/ODM welcome

Product Description

I. Overview

The PTFE magnetic stirrer features a high-purity PTFE coating over a neodymium-iron-boron (NdFeB) permanent magnet core. PTFE's extremely low surface tension and chemical inertness ensure the stirrer remains stable in aggressive media including strong acids, alkalis, and organic solvents — without contaminating samples or adsorbing substances.

The NdFeB magnet core delivers strong and stable magnetic force, maintaining good coupling even at high rotation speeds. Available in Standard (-200℃~110℃) and High-Temperature (-200℃~350℃) grades to meet diverse needs from low-temperature reactions to high-temperature synthesis.

Available in 9 types — A, B, C, D, E, F, G, H, and ZL — with sizes ranging from 3×6mm micro-stirrers to 35×115mm large stirrers for all laboratory container types.

II. Core Performance Parameters

Coating Material: High-purity PTFE, purity > 99.9%
Magnet Core: NdFeB, Br ≥ 1.2T
Standard Temperature: -200℃ ~ +110℃
High Temperature: -200℃ ~ +350℃ (special magnet treatment)
Chemical Resistance: Resistant to HF, aqua regia, concentrated H₂SO₄, HNO₃, strong alkalis, organic solvents
Surface Properties: Non-stick, low friction, easy to clean
Magnet Strength: Standard / High-strength (5000~8000GS) optional

III. Material & Workmanship

Manufactured using imported high-purity PTFE resin with precision molding/coating processes that fully encapsulate the NdFeB magnet core — ensuring no metal contact with media and zero metal ion contamination risk.

High-temperature stirrers use specially treated magnet materials with specialized sintering processes for reliable long-term operation at 350℃, suitable for demanding high-temperature synthesis and molten reactions.

All products are manufactured and packaged in cleanroom environments to ensure particle-free, organic-free surfaces. Each stirrer undergoes magnetic strength testing and visual inspection.

IV. 9 Types Overview

Type	Shape	Size Range	Suitable Vessels	Typical Use
Type A	Rod, rounded ends	3×6 ~ 33×135mm	Round-bottom flasks, tubes	Routine stirring
Type B	Cylinder with ring	3×6 ~ 24×148mm	Flat-bottom beakers	Flat-bottom vessels
Type C	Ellipse/polygon	1.5×9 ~ 35×115mm	Tapered tubes, micro-vessels	Micro/special vessels
Type D	Cross-shaped	6×15 ~ 35×115mm	All vessel types	High-viscosity stirring
Type E	Gear-shaped	3×10 ~ 35×115mm	All vessel types	Intensive/emulsification
Type F	Triangle-shaped	6×15 ~ 35×115mm	All vessel types	Vortex mixing
Type G	Egg/olive-shaped	8×20 ~ 35×115mm	Large beakers, reactors	Large volume stirring
Type H	Ring-shaped	10×20 ~ 19×50mm	Special-shaped vessels	Special adaption
Type ZL	Export standard	4×10 ~ 8×40mm	Export standard vessels	Export standard

Applications

Typical Applications

Chemical Synthesis

Organic synthesis, polymerization, catalytic reactions

Sample Dissolution & Preparation

Solid dissolution, standard solution preparation, buffer mixing

Analytical Pretreatment

Extraction, digestion, derivatization

Biopharmaceutical

Media preparation, cell culture mixing, drug formulation

Environmental Testing

Water sample prep, soil extraction

Materials Science

Nanomaterial dispersion, coating preparation

Industries

Pharmaceutical Drug synthesis, formulation, QC
Chemical Fine chemicals, polymerization, solvent processing
Semiconductor Photoresist preparation, chemical mixing
Food Additive dissolution, sample prep
Research General laboratory stirring

Selection Guide

I. By Container Shape

Container Type	Recommended Type	Recommended Size
Round-bottom flask	Type A (Rod)	A10×30 ~ A20×50
Flat-bottom beaker	Type B (Cylinder Ring)	B8×20 ~ B16×100
Tapered centrifuge tube	Type C (Ellipse)	C3×10 ~ C8×40
Micro-vessel/test tube	Type C / Sphere	C3×6 ~ O12
Large beaker/reactor	Type G (Egg)	G15×50 ~ G35×115

II. By Viscosity & Intensity

Viscosity	Intensity	Recommended Type
Low (water, dilute)	Routine	Type A / B
Medium (alcohols, oils)	Medium	Type C / G
High (resins, syrups)	Powerful	Type D (Cross)
Emulsification	Shear	Type E (Gear)
Vortex mixing	High-efficiency	Type F (Triangle)

💡 Selection Tip: Stirrer length should be 50%~70% of the container bottom diameter. Stirrer diameter should be less than 1/3 of the container opening. For high-viscosity, choose Type D or E with high-strength magnet option.

Operation & Maintenance

User Guide

Standard operating guidelines for PTFE magnetic stirrers.

I. Pre-use Preparation

Inspect PTFE coating for integrity — no cracks, damage, or wear
Clean with ultrapure water or appropriate solvent
Confirm stirrer size fits container (50%~70% of bottom diameter)
Verify magnetic stirrer is operational

II. Placement & Start-up

Place stirrer into container using clean tweezers or tool
Center container on the magnetic stirrer — align stirrer with magnet rotor
Start slowly at low speed (100~200rpm), gradually increase to target speed
Observe for smooth rotation — no jumping or decoupling

III. Operation

Recommended speed: 100~1500rpm — adjust based on viscosity and container size
Avoid running dry — never operate without liquid
Stop immediately if abnormal noise or vibration occurs
Monitor liquid temperature during extended operation

IV. Removal & Cleaning

Stop the stirrer and allow it to come to a complete stop before removal
Use a retriever to remove the stirrer from the container
Clean with ultrapure water or appropriate solvent — PTFE's non-stick surface makes cleaning easy
Stubborn residues may be soaked in dilute nitric acid
Air dry or wipe dry — store in a clean, dry location

💡 From a Seasoned Lab Technician: "Slow start, smooth acceleration" — always start at low speed and allow the stirrer to follow before speeding up. Sudden high-speed starts can cause decoupling and damage.
If decoupling occurs, stop immediately, reposition, and restart slowly.
Use a retriever to remove stirrers from containers — never pour out or use bare hands.

Care & Notes

Show care & notes

⚠️ Safety & Compliance Checklist

Electrical Safety

Check power cord and outlet before use

Chemical Safety

Corrosive chemical operations must be performed in a fume hood

Thermal Safety

Use heat-resistant gloves for high-temperature operations

PPE

Safety goggles, lab coat, acid/alkali resistant gloves required

PTFE Magnetic Stirrer

Specifications

Type A (Rod · Rounded Ends)

Type B (Cylinder with Ring)

Type C (Ellipse/Polygon)

Type D/E/F/G · Special Types

Product Description

I. Overview

II. Core Performance Parameters

III. Material & Workmanship

IV. 9 Types Overview

Applications

Chemical Synthesis

Sample Dissolution & Preparation

Analytical Pretreatment

Biopharmaceutical

Environmental Testing

Materials Science

Selection Guide

I. By Container Shape

II. By Viscosity & Intensity

User Guide

I. Pre-use Preparation

II. Placement & Start-up

III. Operation

IV. Removal & Cleaning

Care & Notes

Electrical Safety

Chemical Safety

Thermal Safety

PPE

Need PTFE Magnetic Stirrers?

PTFE Magnetic Stirrer

Specifications

Type A (Rod · Rounded Ends)

Type B (Cylinder with Ring)

Type C (Ellipse/Polygon)

Type D/E/F/G · Special Types

Product Description

I. Overview

II. Core Performance Parameters

III. Material & Workmanship

IV. 9 Types Overview

Applications

Chemical Synthesis

Sample Dissolution & Preparation

Analytical Pretreatment

Biopharmaceutical

Environmental Testing

Materials Science

Selection Guide

I. By Container Shape

II. By Viscosity & Intensity

User Guide

I. Pre-use Preparation

II. Placement & Start-up

III. Operation

IV. Removal & Cleaning

Care & Notes

Electrical Safety

Chemical Safety

Thermal Safety

PPE

Related Products

PTFE Stirring Rod

PTFE Retriever

PTFE Tweezers

PTFE Spatula

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