Static Disc Bead Mill | PZP 15-300 L

Core Technology & Working Principle

A disc bead mill grinds by moving the whole media charge past the product, not by concentrating energy in a small volume. The rotor discs turn fast enough to throw the beads outward in a radial pattern, and the slurry is pumped through that moving bed along the chamber axis. Because the disc stack leaves an open annulus, the flow path does not throttle as the media loads up, which is what allows a high recirculation rate on a formulation that is already viscous.

▲ Open Flow Path, High Recirculation

The disc stack leaves an open annulus along the chamber, so a large slurry volume passes per unit of pressure drop. High recirculation is how a narrow distribution is reached without a fine screen or a small bead.

▲ Static Screen With Real Open Area

A tubular static slot screen gives a large filtration area for its footprint, so the chamber can pass viscous slurry quickly while still retaining the bead charge. Screen area is what stops the pressure spikes that stall a high-flow circuit.

▲ Lining Chosen for the Abrasive

Chamber and rotor discs are available in silicon carbide, hard alloy, polyurethane or high-wear alloy. On an abrasive active ingredient the lining is a wear-life decision, not a purity decision.

Precision Engineered Details

Four parts decide whether a disc mill runs for years or becomes a wear item on an abrasive slurry. Two of them are inside the chamber, so they are worth specifying rather than accepting a default.

Disc rotor shaft assembly with static separation screen and wear plates on the bench

Disc Rotor and Static Screen

The disc stack on its shaft with the static screen at the discharge end. The rotor geometry, not the motor rating, sets how much slurry moves per pass.

Double Mechanical Seal

A double seal with a barrier fluid keeps the product out of the bearing housing. On a slurry circuit running for hours, this is the part that decides whether the mill survives the campaign.

Bead mill side view showing cooling water connections and pressure gauges

Cooling Water and Pressure Gauges

Cooling water enters and leaves through labelled ports on the chamber jacket, and the gauges on the frame read chamber pressure so a rising trend is visible before it becomes a blockage.

Silicon Carbide Wetted Parts

Chamber and rotor discs in silicon carbide where the active ingredient is abrasive enough that a steel chamber would not last.

PZP Technical Parameters

Six chamber sizes cover pilot through production SC milling. Hourly capacity and cooling water requirement both scale with chamber volume, because both follow the volume of slurry being recirculated.

Model	Working Volume (L)	Motor (kW)	Hourly Capacity (L/h)	Cooling Water (L/h)
PZP-15	15	15	200 – 500	500
PZP-30	30	30	500 – 1,000	1,000
PZP-60	60	37 / 45	800 – 2,000	2,000
PZP-100	100	55	1,000 – 3,000	2,500
PZP-150	150	75	2,000 – 5,000	3,000
PZP-300	300	90 / 110	3,000 – 6,000	5,000

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 PZP 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 is specified where the formulation is both abrasive and viscous, and where throughput is set by how fast the batch can be recirculated rather than by how fine a single pass can go.

Suspension Concentrates (SC)

The core duty: an active ingredient ground to a stable suspension that will not settle in the pack or block a spray nozzle.

Foliar Liquid Fertilizers

Suspension fertilizers where insoluble fractions have to be dispersed finely enough to stay in suspension through the season.

Pigment Color Pastes

Concentrated pigment dispersions where high recirculation gives the narrow distribution that later drives gloss and color strength.

Paper Coating & Minerals

Ground calcium carbonate and mineral slurries where throughput matters more than reaching a nano-scale fineness.

Milling an Abrasive, Viscous Slurry?

Send us the active ingredient, the feed particle size, your target fineness and required hourly output — our engineers will confirm the chamber size, media size and lining material, then quote directly from the Wuxi factory.

Get a Configured Quote Chat on WhatsApp

Technical FAQ

Short answers to the questions asked before specifying a disc bead mill for suspension concentrates.

Why is a disc rotor the right geometry for suspension concentrate milling?

Because SC production is a flow problem before it is a fineness problem. A disc rotor moves a large volume of slurry per revolution and leaves an open path from the inlet to the static screen, so a batch can be recirculated at high rate without the pressure build-up that a pin rotor creates in the same chamber.

What bead size does a disc mill run?

The PZP chamber runs 0.6 to 2.0 mm media, and the practical choice follows the target fineness and the feed particle size. Smaller beads give more contact points for a finer result; the retention screen has to be able to hold whatever size is chosen, so bead and screen are one decision.

How does the mill handle abrasive active ingredients?

Agrochemical solids are abrasive enough to wear a standard steel chamber in months. The wetted chamber parts and the rotor discs can be supplied in silicon carbide, hard alloy, polyurethane or a high-wear alloy, and the choice follows the abrasiveness of the specific active ingredient rather than being a default.

Why does cooling water flow rate matter so much?

Milling energy that is not doing the grinding becomes heat in the slurry, and many active ingredients degrade once the batch temperature climbs. The published cooling water requirement scales with chamber volume, from 500 L/h on the 15 L model to 5,000 L/h on the 300 L model, because the heat load scales the same way.

Can a disc mill reach the same fineness as a pin mill?

Both can reach the 2 to 5 micron range typical of SC work. The difference is the energy density and the flow path: a disc rotor moves more volume at lower local shear, a pin rotor concentrates shear in a smaller volume. The right choice depends on how much recirculation the formulation can tolerate.

Are explosion-proof builds available?

Explosion-proof configurations are available upon request, with the motor and control package matched to the classification of the area. The mechanical arrangement, chamber and screen stay the same.

High Efficiency Disc Bead Mill for Pesticide

PZP Static Disc Bead Mill (High-Flow Grinding for Suspension Concentrates, 15 – 300 L)