PZD Dynamic Disc Type Horizontal Bead Mill

Core Technology & Working Principle

The disc array is the oldest and still the most forgiving geometry for horizontal wet grinding. Discs accelerate the bead charge radially at each rim, so the mill develops shear in a series of planes along the chamber instead of in one concentrated zone. That distribution is why a disc mill tolerates a wide viscosity band and why it stays the default choice for paint and ink.

▲ Disc Array Geometry

Each disc rim accelerates beads outward, and product passes from one disc stage to the next along the shaft. Because the work is spread across several discs rather than concentrated at a single point, the mill handles higher feed viscosity and coarser feed without stalling, at the cost of somewhat lower energy density than a pin geometry.

▲ Dynamic Gap Separator

The bead retention device at the outlet is a rotating gap rather than a static screen. A rotating gap throws beads back into the chamber by centrifugal action, so the flow area does not blind over as product passes, which is what allows the mill to run at higher flow with finer beads than a static screen permits.

▲ Chamber Cooling Jacket

Grinding generates heat at the bead contacts, and the jacket around the chamber removes it before the product degrades. Cooling water requirement scales with chamber size, from 500 L/h on the PZD-05 to 2,000 L/h on the PZD-100, so confirm the plant supply before specifying a large frame.

Precision Engineered Details

The chamber, the seal and the separator decide how long a horizontal mill runs between services. These are the assemblies we machine in-house rather than buy in.

Chamber and Disc Shaft

The chamber is a hard-wearing cylinder, and the discs are keyed to the shaft in a fixed spacing that sets the number of grinding stages. Disc diameter and spacing are matched to the chamber volume so that bead fill ratio stays in the working band.

Mechanical seal and pressure gauge assembly on the PZD horizontal bead mill

Mechanical Seal and Gauges

The mechanical seal separates the product chamber from the drive, and the pressure gauge shows whether the separator is starting to blind. A rising chamber pressure is the earliest warning that a bead change or a separator clean is due.

Diaphragm pump and piping on the PZD horizontal bead mill skid

Feed Pump and Piping

A diaphragm pump feeds the chamber because it handles abrasive slurry without the close clearances a centrifugal impeller needs. The piping and valve set lets the operator switch between recirculation and single pass.

PZD Series Technical Parameters

Five chamber sizes cover 5 to 100 L. Main power scales from 5.5 kW on the PZD-05 to 55 kW on the PZD-100, and production capacity from 50-200 L/h up to 800-2,000 L/h. Cooling water requirement rises with chamber size, from 500 L/h to 2,000 L/h.

Model	Chamber Volume (L)	Main Power (kW)	Production Capacity (L/h)	Cooling Water Req. (L/h)
PZD-05	5	5.5	50 - 200	500
PZD-20	20	15	100 - 300	1000
PZD-30	30	22	200 - 500	1000
PZD-50	50	30	500 - 1000	1500
PZD-100	100	55	800 - 2000	2000

Reference projects in your industry are available on request.

Our Manufacturing Advantages

POLYC manufacturing plant in Wuxi, certified to CE and ISO 9001

🏢 Direct Source Factory

Shanghai Polyc Technology Co., Ltd. is not a reseller. Every PZD disc bead mill 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 disc geometry suits products where the feed is already pre-dispersed and the job is to reduce particle size into the micron band. Where the feed still contains unwetted agglomerates, the dispersion stage has to come first; where batches are small and change often, a basket mill is usually the better fit than a pumped chamber.

Decorative Paints and Coatings

Reducing pre-dispersed pigment and extender down to the target fineness before let-down.

Solvent and Water-Based Inks

Grinding ink concentrates where a wide viscosity band and a forgiving bead retention gap matter more than peak energy density.

Pigment Concentrates

Size reduction of organic and inorganic pigment pastes at production scale.

Chemical and Agrochemical Slurries

Wet grinding of suspension concentrates where the chamber has to tolerate abrasive filler.

Specify a PZD Horizontal Grinding Mill for Your Product

Send the feed fineness, the target fineness, the viscosity in cps and the required throughput in liters per hour. We will confirm the chamber size, the bead diameter and the cooling requirement in one quotation, usually within 24 hours.

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Technical FAQ

These are the questions buyers ask most often before specifying a horizontal disc mill.

What is a dynamic disc type horizontal bead mill used for?

It reduces the particle size of a pre-dispersed slurry by pumping it through a chamber filled with grinding beads, where discs on a rotating shaft accelerate the beads and generate shear. It is used for paints, inks, pigment concentrates and chemical slurries. It grinds; it does not wet powder into liquid, so the dispersion stage has to happen upstream.

What is the difference between a disc mill and a pin mill?

Both are horizontal chamber mills. A disc array spreads the work along the chamber in a series of shear planes, so it tolerates a wider viscosity band and coarser feed. A pin geometry concentrates energy into a smaller volume, which suits finer target sizes and lower viscosity feeds but is less forgiving of coarse or viscous product.

How do I choose between the five PZD frames?

Start from the required throughput and the target fineness, not from chamber volume alone. The PZD-05 has a 5 L chamber and runs 50-200 L/h on 5.5 kW, while the PZD-100 has a 100 L chamber and runs 800-2,000 L/h on 55 kW. Higher throughput or a finer target both push you up the range.

Why does chamber cooling water requirement matter?

Grinding generates heat at the bead contacts. The jacket removes it, but the flow required rises with chamber size, from 500 L/h on the PZD-05 to 2,000 L/h on the PZD-100. If the plant cannot supply that flow, the product temperature will climb and heat-sensitive formulations will degrade.

What viscosity can the PZD handle?

The mill is rated for material viscosity up to 20,000 cps. Above that band, feed stops flowing through the chamber reliably and a basket mill or a high-viscosity mixer is the correct machine instead of a pumped horizontal chamber.

What warranty applies to a PZD horizontal bead mill?

Every PZD unit carries our 3-Year Global Warranty, with discs, chamber liners, mechanical seals and separator parts available for dispatch. Exact terms are stated on the formal quotation. Explosion-proof configurations are available upon request.

Disc type horizontal bead mill for paint