Core Technology & Working Principle
One shaft cannot do both jobs at high viscosity. Turn a single disperser shaft up and the batch circles it as a frozen cylinder, leaving dead zones at the wall and bottom; slow it down and the powder never reaches the shear zone. The PM series splits the work between two shafts running at independent speeds in the same vessel.
▲ Butterfly Paddle Sweeps the Full Section
The low-speed shaft carries a frame-type butterfly blade of 500 to 1100 mm — close to the tank diameter — running at up to 120 rpm. It sweeps the wall and bottom, keeps heat-transfer surfaces clean and returns settled material into the active zone instead of letting it rotate as a solid body.
▲ Toothed Disc Does the Dispersion
The high-speed shaft runs a toothed dispersion disc of 200 to 330 mm at up to 1450 rpm. Agglomerates are pulled into the high-velocity shear zone at the disc rim and broken down to their primary particle size, exactly as on a dedicated disperser.
▲ Independent Speeds, One Vessel
Each shaft has its own motor and variable frequency drive, so the machine can run the paddle alone while the jacket heats the batch, the disc alone for powder wet-out, or both together for the final let-down — without changing vessels.
Precision Engineered Details
The working end, the vessel handling and the drive package decide whether a butterfly mixer still holds its mixing accuracy after years of high-viscosity service.
PM Series Technical Parameters
Motor ratings are given as ranges because the final selection follows product viscosity and batch size rather than vessel volume alone. All four frames share the 0–1450 rpm high-speed shaft; paddle speed is set against viscosity.
| Model | Tank Capacity (L) | High-Speed Motor (kW) | Low-Speed Motor (kW) | Disc Dia. (mm) | Butterfly Blade Dia. (mm) | High Speed (rpm) | Low Speed (rpm) | Lift Stroke (mm) |
|---|---|---|---|---|---|---|---|---|
| PM150 | 150 | 7.5 – 11 | 4 – 5.5 | 200 | 500 | 0–1450 | 0–60 | 700 |
| PM500 | 500 | 18.5 – 22 | 7.5 – 15 | 250 | 800 | 0–1450 | 0–90 | 950 |
| PM600 | 600 | 22 – 37 | 11 – 30 | 280 | 900 | 0–1450 | 0–120 | 1100 |
| PM900 | 900 | 30 – 55 | 11 – 37 | 330 | 1100 | 0–1450 | 0–120 | 1100 |
Reference projects in your industry are available on request.
Our Manufacturing Advantages
🏢 Direct Source Factory
Shanghai Polyc Technology Co., Ltd. is not a reseller. Every PM butterfly double shaft mixer is machined, assembled and tested at our Wuxi plant, so you buy at the factory price and speak directly to the engineers who built it.
✈️ 30–45 Days Fast Delivery
Standard models ship in 30–45 days from confirmed drawings, thanks to our integrated vertical in-house production lines.
🛡️ Strict Quality Control
Key welds, seals and running accuracy are inspected before assembly, and each machine is run at the factory before packing.
🔧 3-Year Global Warranty
Every unit is covered for three years, with remote video support and spare parts stocked for dispatch worldwide.
Target Application Spectrum
The butterfly double shaft mixer is specified wherever viscosity is high enough to stall a single-shaft disperser, but a full planetary machine or kneader is more machine than the batch needs. Typical duties:
Silicone Sealants & Adhesives
Pre-mixing and pre-dispersing high-viscosity sealant and adhesive bases, where the paddle keeps the bulk moving while the disc wets filler into the resin.
High-Build Coatings & Putties
Textured and stone-look coatings, high-build primers and putty-like products that a plain single-shaft disperser cannot circulate on its own.
Printing Ink & Pigment Pastes
Milling-base premixes and pigment pastes at viscosities where the paddle is needed to keep a consistent supply of material flowing to the disc.
Chemical & Grease Pastes
Chemical pastes, greases and similar products that must be mixed and dispersed without being transferred between vessels.
Specify a PM Butterfly Mixer for Your Batch
Send your product type, working viscosity, batch volume in liters and whether the formula is solvent-based. Our Wuxi engineers match the frame, blade and disc diameters, confirm the electrical build for your site, then quote direct from the factory.
Technical FAQ
The questions process engineers ask before specifying a butterfly double shaft mixer.