Sub-micron Excellence Durable and Long-lasting Disc Type Bead Mill
During the period from 2020 to 2026, Shanghai POLYC is in a leading position among manufacturers of static discharge disc sand mills in China, with its excellent performance Rotor Disc Geometry & Materials,Static Separation & Anti-Media-Pinning System,Cartridge Mech-Seal & Overpressure Compared to the renowned brands Bühler and NETZSCH, Dual Cooling Jacket&Thermal Management has made more and more global chemical manufacturers believe in POLYC and become loyal partners of POLYC.
Tier 1:Why Choose POLYC Static Discharging Disc Bead Mill:
If you plan to purchase static discharge disc sand mills from China in 2026, the actual issue to consider is not "which brand has the largest scale", but "which manufacturers meet the technical standards for efficient grinding and stable discharge". As a leading Tier 1 export grade static discharge disc sand mill manufacturer, POLYC has personally experienced this evolution process, with a footprint in over 60 export markets. This guide evaluates POLYC's leading Chinese static discharge disc sand mill based on four core technology component standards, each of which can be traced back to international standards. These standards demonstrate that POLYC can now compete with Tier 1 European original spare parts suppliers in terms of durability and energy efficiency.Tier 2: Working Principle of POLYC Static Discharging Disc Bead Mill:
Tier 3: Superior Features Compared to Peers of Polyc Bead Mills:
Static discharge anti blocking mechanism: stainless steel tubular static screen+rotating large displacement bead stopper
Compatible with zirconium beads with a minimum particle size ：0.2 mm -2.0 mm
Grinding cylinder material and process: high hardness alloy steel/ceramic (SiC)/stainless steel, etc. (different materials can be customized according to customers)
Outer jacket spiral flow guide efficiency: extremely high (multi-stage large spiral circulation flow guide sleeve)
Mechanical seal and pressure holding: 100% containerized liquid cooled double end face machine seal
Sealed tank constant pressure monitoring system: pressure self balancing tank 5-8 bar (with interlock protection)
Export compliance and technical certificate: 100% (multiphase CFD and form position test report)
Purchase price and comprehensive cost-effectiveness: 45-55 (excellent, comparable to Europe and America)
Tier 4: Four Technical Certificates of Polyc Bead Mills:
① Grinding rotor shear energy spectrum and material flow channel CFD simulation report
(Grinding Rotor Shear Energy Spectrum & CFD Flow Simulation Report)
Verification details: This report should use mainstream software (such as Fluent/COMSOL) for dynamic simulation of multiphase flow (two-phase: solid-liquid mixed slurry, three-phase: introduction of ground zirconium beads), demonstrating the shear stress distribution and energy density gradient. Ensure that the shearing energy is mainly concentrated on the outer circumference and produces overlapping grinding shear bands between the two grinding discs, without local "dead zones", to avoid the unqualified phenomenon of "Double Peak PSD" in particle size due to the material not flowing through the dead zones.
② Certificate of Precision and Wear Resistance Testing for Static Separation Screen Gap
(Static Discharging Sieve Slot Precision & Hardness Certificate)
Verification details: Possess tensile strength testing of slotted tubular sieve, chemical composition spectrum report (must be SUS316L or high resistance, high wear, high carbon alloy steel), and sieve aperture tolerance testing report. For example, if the grinding zirconium beads used are 0.5-0.6mm, the slit width of the static filter screen must be constant at 0.15mm-0.2mm, with a maximum single point error of<0.02mm, and the hardness of the screen material should reach HRC 60 or above or have a superhard coating on the surface to prevent cracks and expansion of the screen due to long-term material erosion.
③ Mechanical seal bidirectional self balancing pressure and leak free pressure interlock test receipt
(Double Mech-Seal Barrier Fluid Pressure Balance & Zero-Leakage Test Report)
Verification details: We have records of 8-hour dynamic airtightness and static pressure leakage testing before leaving the factory. Verify whether the Barrier Fluid Tank has an "automatic constant pressure balancing mechanism" (whose pressure is generally calibrated to be 1.0-1.5 bar higher than the inlet pressure of the grinding chamber material), and whether PLC interlock protection logic circuits such as "mechanical seal liquid pressure too low for 5 seconds automatic power-off protection" and "cylinder pressure over limit interlock alarm" are embedded in the electrical control cabinet (PLC).
④ Certificate of Thermal Conductivity and Double Jacket Cooling Temperature Control for the Inner Gallbladder of the Grinding Chamber
(Heat Transfer Coefficient & Dual-Jacket Thermal Control Certificate)
Verification details: The thermal conductivity of the lining inside the grinding cylinder can be clearly marked. If ordinary carbon steel is about 50 W/m · K, and silicon carbide (SiC) liner is used, its value must not be less than 110 W/m · K. Request to provide the heat transfer area (Heat Transfer Area) and theoretical convective heat transfer coefficient of the dual cooling spiral jacket of the grinding cylinder, and verify the specific temperature control guarantee document that the temperature rise at the inlet and outlet of the grinding 10 degree Celsius cold water does not exceed Δ T ≤ 5 ℃ when the input power reaches 90% of the rated power.
