Pin Type Bead Mill
Horizontal pin-type bead mill for nanometer-range grinding, supporting media down to 0.2mm with centrifugal separation and force cooling.
Dispersers
Dual Shaft Mixer / Double Shaft Mixer (High Speed Disperser)
Double Shafts High Speed Disperser: Our PDH Double Shafts Disperser is also called High Speed Dissolver which is equipped with two dispersing shafts and is suitable for producing paint, ink, coating, dyestuff, paper making and so on in chemical... Capacity range 50 - 10,000 L. Typical applications: Architectural Paints, Industrial Coatings, Printing Inks, Adhesives & Sealants, Construction Chemicals.
Our PDH Double Shafts Disperser is also called High Speed Dissolver which is equipped with two dispersing shafts and is suitable for producing paint, ink, coating, dyestuff, paper making and so on in chemical industry. The PDH Double Shafts Disperser can be used for wet dispersing and mixing liquid-solid material. Stepless speed adjustment through frequency converters (VFD), hydraulic lifting, stable operation, and easy use and maintenance.
The POLYC PDH is a dual shaft mixer and double shaft mixer built with two counter-positioned dispersing shafts. Configured with paddles it works as a double shaft paddle mixer for heavy pastes; configured with discs it is a high-shear dissolver for paints, inks and coatings. The twin shafts deliver higher total shear and a stronger circulation pattern than a single shaft, so paints, inks, coatings, adhesives and sealants are wetted, deagglomerated and homogenised faster and more uniformly. A variable-frequency drive controls tip speed, a hydraulic lift positions the shafts for vessel access, and an optional jacket keeps temperature-sensitive batches stable.
Key Facts
- Equipment Type
- Dispersers
- Capacity / Batch Range
- 50 - 10,000 L
- Motor Power
- 15 - 110 kW
- Max Viscosity
- up to approximately 50,000 cP
- Typical Applications
- Architectural Paints, Industrial Coatings, Printing Inks, Adhesives & Sealants
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Response within 24 hours · Engineering consultation · Application review available
Where the PDH Double Shafts Disperser Performs Best
Industry ApplicationsTwo dispersing shafts make the PDH the right choice for high-volume, highly filled batches where uniform dispersion and short cycle time matter.
🎑
Architectural Paints
High-volume latex pre-mixing and letdown up to 50,000 cP with consistent colour development across the batch.
🪓
Industrial Coatings
Simultaneous dispersion and homogenisation of highly filled coating systems.
🖨
Printing Inks
Ink pre-mixing and pigment wetting before bead milling for cleaner print and colour strength.
🔨
Adhesives & Sealants
Filled adhesive base preparation up to 50,000 cP with reliable batch uniformity.
🎨
Pigment Pastes
Paste incorporation and dispersion with two-shaft circulation for high colour strength.
🛡
Marine Coatings
High-build coating dispersion with dual-agitator coverage of large production batches.
PDH Series at a Glance
Series Overview200–5,000L
Working Capacity
15–110kW
Motor Power
22m/s
Tip Speed
50k cP
Viscosity Range
Key Design Features
Engineering2× Shafts⚡
Two Dispersing Shafts
- Twin high-speed shafts for higher total shear
- Shorter batch time than a single-shaft unit
- More uniform dispersion across the vessel
Uniform🌬
Improved Circulation
- Strong radial flow and velocity gradient
- Even colour and viscosity development
- Better turnover than single-shaft design
Lift⬆
Hydraulic Lift
- Hydraulic lift for vessel access
- Fast cleaning between batches
- Stable operation and easy maintenance
VFD⚙️
Tip-Speed Control
- Variable-frequency drive
- Tip speed adjusted as viscosity changes
- Controlled shear during dispersion
Heat + Cool❄️
Jacketed Option
- Optional jacketed vessel
- Temperature-controlled production
- Protects heat-sensitive formulations
Heavy Duty🔋
Robust Drive
- Robust drive and shaft design
- Sustained daily production duty
- Modular shaft and blade options
Applications by Industry
Selection| Industry | What Dual-Shaft Dispersion Delivers |
|---|---|
| Architectural Paints | High-volume latex pre-mixing and letdown up to 50,000 cP |
| Industrial Coatings | Simultaneous dispersion and homogenisation of filled systems |
| Printing Inks | Ink pre-mixing and pigment wetting before bead milling |
| Adhesives & Sealants | Filled adhesive base preparation up to 50,000 cP |
| Construction Chemicals | Putty and coating compound mixing at medium-high viscosity |
| Pigment Pastes | Paste incorporation and dispersion with two-shaft circulation |
| Corrosion Protection | Anticorrosive primer dispersion at production batch scale |
| Marine Coatings | High-build coating dispersion with dual-agitator coverage |
Choosing the Right Double Shafts Disperser
How to Choose1
Define your batch
Vessel diameter, batch volume, viscosity (up to ~50,000 cP), solids loading and target dispersion quality.
2
Configure the machine
Shaft power, blade diameter, tip speed, lifting stroke and cover arrangement matched to your process.
3
Confirm safety
Explosion-proof, vacuum, temperature-control and product-contact (304 / 316L) requirements before manufacture.
Related Technical Guides
Guides
SpecsHigh Speed Disperser Specs and Selection Guide
SelectionHow to Choose a High Speed Disperser
ImpellerHigh-Speed Disperser Impeller Selection
ConfigSingle Shaft vs Dual Shaft Disperser
Need a double-shaft disperser configured for your process?
Request a QuotationApplication Scenarios: Putty, Plaster and Adhesive Compounding
The PDH twin-shaft layout is chosen when a single disc cannot circulate the batch. Typical duties include a wall putty double shaft mixer and a wall plaster double shaft mixer for construction chemicals, a plaster double shaft mixer for gypsum and cementitious plasters, and a car putty double shaft mixer for polyester body filler. Adhesive producers use it as a glue double shaft mixer and an adhesive double shaft mixer for solvent-free and water-based systems in the 50-10,000 L range.
Description
How it works
The POLYC PDH Double Shafts High Speed Disperser is a high-shear dissolver engineered for wet dispersing and mixing of liquid-solid materials. Two counter-positioned dispersing shafts generate strong shear that wets out powders, breaks agglomerates and shortens dispersion time.
Radial flow and a strong velocity gradient circulate the batch so viscosity and colour develop evenly across the vessel. Variable speed and adjustable blade position keep an effective dispersion flow pattern as the batch thickens.
A hydraulic lift raises the shafts for vessel access and cleaning, modular shaft and blade options support different dispersion duties, and optional jacket, explosion-proof and vacuum configurations are available for solvent-based and temperature-sensitive processes.
INDUSTRIES THIS MACHINE SERVES
Industries we serve
Adhesives & Sealants
High-shear dispersion for adhesives, sealants, and polymer systems.
Learn more →Chemicals
Powder wetting and dispersion for chemical and general industrial applications.
Learn more →TYPICAL PERFORMANCE REFERENCE
| Material Type | Viscosity Range | Typical Speed | Batch Size |
|---|---|---|---|
| Low-viscosity coatings | < 5,000 cP | 1,500-3,000 rpm | 10-1,000 L |
| Medium-viscosity paste | 5,000-50,000 cP | 1,000-1,500 rpm | 50-500 L |
| High-viscosity adhesive | > 50,000 cP | 500-1,000 rpm | 50-500 L |
Typical reference values only. Actual results depend on formulation, bead material, and process conditions. Material testing is recommended before final selection.
Looking for a complete ink or coating production line?
View Turnkey Ink Line →View Turnkey Paint Line →Looking for a complete adhesive or sealant production line?
View Turnkey Adhesive Line →HIGH-SPEED DISPERSER VS BEAD MILL
Which equipment do you need?
| Dimension | High-Speed Disperser | Bead Mill |
|---|---|---|
| Primary function | Wetting and deagglomeration | Fine grinding and particle size reduction |
| Output particle size | 20 - 100 μm | 0.1 - 20 μm |
| Typical viscosity | < 10,000 mPa·s | 1,000 - 50,000 mPa·s |
| Process stage | Premixing / dispersion step | Final milling / fine grinding step |
| Capital cost | Lower | Higher |
| Best for | Paint mixing, pigment wetting, medium-viscosity materials | Ink, coatings, battery materials, fine grinding |
Read the full comparison guide: High Speed Disperser vs Bead Mill: Which Equipment Do You Need?
Process Engineering
Working Principle
- 1
A toothed dispersing blade rotates at high speed inside the vessel.
- 2
Radial flow and a strong velocity gradient wet powder, break loose agglomerates, and circulate the batch.
- 3
Variable speed and blade position are adjusted as viscosity changes to maintain an effective dispersion flow pattern.
Equipment Benefits
Equipment Advantages
- ✓
Variable speed adapts shear to changing batch viscosity.
- ✓
Hydraulic lifting improves vessel access and cleaning.
- ✓
Modular shaft and blade options support different dispersion duties.
- ✓
Simple batch operation integrates readily with production vessels.
Technical Data
Technical Specifications
| Parameter | Value |
|---|---|
| Working capacity | 200 - 5,000 L |
| Motor power | 15 - 110 kW |
| Tip speed | up to 22 m/s |
| Viscosity range | up to approximately 50,000 cP |
| Lift | Hydraulic |
| Contact material | Stainless steel 304 / 316L |
| Temperature control | Optional jacketed vessel |
PRODUCT INQUIRY
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Equipment Guidance
Frequently Asked Questions
What is a double-shaft high-speed disperser?
A double-shaft high-speed disperser is a dissolver with two counter-positioned dispersing shafts. The twin shafts deliver higher total shear and a stronger circulation pattern than a single shaft, so paints, inks, coatings, adhesives and sealants are wetted, deagglomerated and homogenised faster and more uniformly.
Double-shaft vs single-shaft disperser - what is the difference?
A single-shaft disperser gives one shear zone and a weaker circulation pattern. A double-shaft unit adds a second high-speed shaft, improving batch turnover and uniformity, which matters for high-volume, highly filled batches up to about 50,000 cP.
What capacity and viscosity range does the PDH double-shaft disperser cover?
The PDH series handles working capacities from 200 to 5,000 L with motor power from 15 to 110 kW, and processes viscosities up to approximately 50,000 cP when fitted with the right blade and shaft configuration.
How does the dual-shaft design improve dispersion quality?
Two shafts create overlapping radial flow and a stronger velocity gradient, so powders wet out faster, agglomerates break more completely, and colour and viscosity develop evenly across the vessel.
What tip speed and power does the PDH series offer?
Tip speed reaches up to 22 m/s and motor power ranges from 15 to 110 kW, with a variable-frequency drive controlling shear as the batch viscosity changes during dispersion.
Is the double-shaft disperser available with a jacketed vessel?
Yes. An optional jacketed vessel provides heating and cooling for temperature-controlled production, which helps with heat-sensitive resins and exothermic batches.
Can the disperser be configured for explosion-proof or solvent-based processes?
Yes. Explosion-proof motors, electrical controls and sealing options are available when required by your solvent, plant classification or local regulations.
How do I select the right double-shaft disperser configuration?
Start from vessel diameter, batch volume, viscosity, solids loading and target quality, then match shaft power, blade diameter, tip speed, lifting stroke and cover arrangement. POLYC engineers confirm explosion-proof, vacuum, temperature-control and product-contact requirements before manufacture.
Is a dual shaft mixer the same as a double shaft mixer?
Yes. Dual shaft mixer, double shaft mixer and twin shaft disperser describe the same machine: two counter-positioned shafts working in one vessel, one for bulk circulation and one for high-shear dispersion.
When should I choose a double shaft paddle mixer?
Choose a double shaft paddle mixer when the batch is too viscous for a single sawtooth disc to circulate — for example filled adhesives, sealants, putty and high-solids pastes. The paddle shaft keeps the whole batch moving while the disperser shaft deagglomerates the solids.
What capacity range do you build dual shaft mixers in?
POLYC builds dual shaft mixers from 50 to 10,000 litres, with VFD tip-speed control, hydraulic lift and an optional jacket for temperature-sensitive batches.
Industry Applications
Applications
Architectural Paints
high-volume latex pre-mixing and letdown to ≤50,000 cP
Industrial Coatings
simultaneous dispersion and homogenisation of filled systems
Printing Inks
ink pre-mixing and pigment wetting before bead milling
Adhesives & Sealants
filled adhesive base preparation to ≤50,000 cP
Construction Chemicals
putty and coating compound mixing at medium-high viscosity
Pigment Pastes
paste incorporation and dispersion with two-shaft circulation
Corrosion Protection
anticorrosive primer dispersion at production batch scale
Wood Coatings
lacquer and primer pre-mixing with improved wall turnover
Plastic Coatings
colour paste incorporation to ≤50,000 cP
Marine Coatings
high-build coating dispersion with dual agitator coverage
WHY POLYC MACHINE
Built on 25 Years of Engineering Excellence
Every machine is designed by our in-house R&D team, built in our own factory, and supported by the same team that has delivered over 8,000 systems worldwide.
ISO 9001 & CE Certified
Manufactured under an ISO 9001 quality management system. All machines comply with CE directives, with EC Declaration of Conformity for every order.
25 Years Experience
Since 2001, POLYC has engineered wet grinding, dispersing and mixing systems for global manufacturers.
3-Year Warranty
Every machine carries a 3-year warranty with ongoing spare-parts supply and technical support after delivery.
30-Day Delivery
Standard models ship within 30 days of order confirmation. Custom-engineered lines are scheduled against your project timeline.
Free Installation Guidance
Free installation guidance and operator training are included with every machine, covering commissioning and safe start-up.
Custom Engineering
From lab-scale 0.5L to 12,000L production systems. Material testing, configuration and process design included.
24-Hour Response
Engineering consultation within 24 hours. Application review, technical specs and quotation delivered fast.
Global Shipping
Export-ready packaging with full documentation. DDP/FOB/CIF terms available for 80+ countries.
Lifetime Technical Support
Genuine spare parts, remote diagnostics and lifetime technical support for every machine we build.
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