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Derrick Polyweb Screen Model ID in 5 Min

2026-07-18

How to Identify Your Derrick Polyweb Screen Model in 5 Minutes | Complete Engineering & Procurement Guide for Mining Plants

Quick Answer

What is a Derrick Polyweb Screen Panel and Why Does Correct Identification Matter?

A POLYURETHANE SCREEN PANEL from Derrick's Polyweb series is a precision-engineered urethane screening surface used on Stack Sizer and SuperStack fine-screening machines for wet mineral classification. It features a drawbolt tensioning system, non-blinding urethane construction, and apertures as fine as 45 microns (325 mesh). Correct identification prevents costly ordering errors, installation delays, production downtime, and poor screening performance that can cost mining operations tens of thousands of dollars per incident.

Key Takeaways

✔ Machine identification is the critical first step — Check the nameplate for model, serial number, and deck count before ordering replacement panels. Do not rely on memory or photographs.

✔ Physical measurements are non-negotiable for accuracy — Overall length, width, thickness, and hook dimensions must be verified with precision tools before placing an order.

✔ Tensioning direction determines compatibility — A panel designed for side-to-side tensioning cannot be used in a front-to-back system. This is the most common cause of installation failure.

✔ Aperture measurement requires laboratory-grade precision — Use a microscope or calibrated gauge, not a standard ruler, for fine-mesh screens below 150 microns.

✔ Process conditions influence panel selection and service life — Material type, feed rate, solids concentration, and service life expectations are as important as physical dimensions for selecting the correct polyurethane formulation.

Derrick Polyweb Screen Model ID in 5 Min 1

Summary Table

Item	Description
Function	Fine-particle wet screening and classification in mineral processing circuits
Material	Cast polyurethane elastomer (Polyweb® proprietary urethane formulation)
Application	Derrick Stack Sizer (up to 5 decks), SuperStack (up to 8 decks), and fine-screening systems
Service Life	6–12 months typical, up to 18 months in less demanding applications
Benefits	Non-blinding properties, high open area (up to 45%), superior wear resistance, quick changeover (30–40 minutes for five decks)
Aperture Range	45 microns (325 mesh) to 500 microns (standard configurations)

Definition

A POLYURETHANE SCREEN PANEL is a modular screening media component manufactured from cast polyurethane elastomer through precision moulding processes. Derrick's Polyweb screens are specifically engineered for wet fine-screening applications in mineral processing, featuring:

Proprietary urethane formulations — Optimized for wear resistance, elasticity, and non-blinding properties
Precision aperture geometry — Available in square, slotted, and custom shapes
Drawbolt tensioning system — Ensures consistent panel tension across the entire deck
Modular design — Allows quick panel replacement without removing the entire deck

The term "Polyweb" refers to Derrick's patented urethane screen panel design, which incorporates non-blinding properties and high open-area ratios to maximize screening efficiency while minimizing maintenance downtime.

Working Principle

The Derrick Polyweb screen operates on the principle of high-frequency vibration combined with fine-aperture urethane screening surfaces.

Screening Mechanism:

Feed Introduction: Material slurry is fed onto the screen deck through a feed box or distributor.
High-Frequency Vibration: The screen exciter generates high-frequency vibration (typically 3,000–6,000 RPM), causing particles to stratify by size.
Particle Separation: Particles smaller than the aperture pass through the openings (undersize), while larger particles travel across the screen surface to the discharge end (oversize).
Non-Blinding Action: The polyurethane material provides slight flexing under vibration, preventing particle blinding and ensuring consistent throughput.

Key Advantages of Polyurethane Construction:

Property	Mechanism	Benefit
Elasticity	Slight flexing under vibration	Prevents particle blinding and pegging
Wear Resistance	Abrasion-resistant urethane formulation	Extends service life in abrasive applications
Non-Blinding Properties	Surface tension and aperture design	Reduces clogging from near-size particles
Dimensional Stability	Precision moulding	Maintains consistent aperture geometry over time

The drawbolt tensioning system ensures the SCREEN PANEL remains taut across the deck, maintaining consistent aperture geometry and screening performance throughout the panel's service life.

Benefits of Correct Screen Identification

Derrick Polyweb Screen Model ID in 5 Min 2

Benefit	Quantitative Impact	Qualitative Impact
Reduced Downtime	60–80% reduction in installation time	Faster return to production, lower maintenance cost
Optimal Screening Efficiency	5–15% improvement in separation accuracy	Consistent product quality, improved recovery
Extended Panel Life	2–3× longer service life	Lower cost per tonne processed
Cost Savings	$50,000–$100,000 annual savings	Eliminates wrong orders, restocking fees, expedited shipping
Consistent Product Quality	±2% particle size variation	Stable downstream process performance
Improved Maintenance Planning	Predictive vs. reactive maintenance	Reduced emergency orders, better inventory management

Applications

Derrick Polyweb screen panels are used in a wide range of mineral processing applications across the mining industry:

Application	Ore/Material Type	Typical Aperture Range	Process Stage
Iron Ore Beneficiation	Hematite/magnetite fines	45–150 microns	Grinding circuit classification
Copper Ore Processing	Copper sulphide/oxide	75–300 microns	Flotation feed preparation
Coal Preparation	Fine coal (minus 0.5mm)	100–500 microns	Dewatering and classification
Gold Recovery	Gold ore slurry	45–150 microns	CIL/CIP feed preparation
Lithium Processing	Spodumene fines	75–200 microns	Dense media separation feed
Silica Sand Classification	Silica sand	100–300 microns	Glass sand production
Tailings Management	Tailings slurry	150–500 microns	Tailings dewatering and thickening

Material Comparison: Polyurethane vs. Rubber vs. Steel

Property	Polyurethane	Rubber	Steel
Wear Life	★★★★★	★★★☆☆	★★★★☆
Blinding Resistance	★★★★★	★★★★☆	★☆☆☆☆
Open Area	Up to 45%	30–40%	25–35%
Flexibility	★★★★☆	★★★★★	★☆☆☆☆
Temperature Resistance	★★★☆☆ (<80°C)	★★★☆☆ (<70°C)	★★★★★
Chemical Resistance	★★★★☆	★☆☆☆☆	★★★★★
Cost (Lifecycle)	★★★★★	★★★☆☆	★★★☆☆
Installation Ease	★★★★★	★★★★☆	★★★☆☆

Best Use Case Recommendations:

Material	Recommended Application	Avoid Application
Polyurethane	Wet fine screening, abrasive ores, non-blinding requirements	High-temperature (>80°C), oil/solvent exposure
Rubber	Coarse screening, impact applications, cost-sensitive projects	Fine screening, oil/solvent exposure
Steel	High-temperature applications, dry screening, structural integrity	Wet fine screening, non-blinding requirements

Application Comparison: Stack Sizer vs. SuperStack

Feature	Stack Sizer	SuperStack
Max Decks	5	8
Screen Size	Standard (varies by model)	Larger footprint (varies by model)
Tensioning System	Drawbolt (standard)	Drawbolt (varies by configuration)
Panel Configuration	2–4 panels per deck (varies)	Varies by model and deck position
Primary Application	Fine wet screening (45–500 microns)	High-capacity fine screening (45–300 microns)
Changeover Time	30–40 minutes (5 decks)	Varies by configuration

⚠️ Critical Note: Always verify the actual machine model and panel count before ordering replacement SCREEN PANELS . Do not assume compatibility between models or generations.

Industry Application Matrix

Ore Type	Recommended Panel Type	Typical Aperture	Expected Service Life	Key Operating Conditions
Iron Ore	High-wear polyurethane	75–150 microns	8–12 months	Abrasive, high solids density (40–50%)
Copper Ore	Standard polyurethane	100–250 microns	6–10 months	Moderate abrasion, variable slurry density
Coal	Non-blinding polyurethane	150–500 microns	10–14 months	High moisture, sticky material
Gold Ore	Fine-aperture polyurethane	45–100 microns	6–9 months	Fine grinding circuit, high wear
Lithium Ore	Abrasion-resistant PU	75–150 microns	8–12 months	Moderate abrasion, high solids
Silica Sand	High-open-area PU	100–300 microns	10–14 months	Abrasive, low solids density
Tailings	Heavy-duty PU	200–500 microns	8–12 months	Variable feed, high capacity

Selection Guide

When selecting a replacement Derrick Polyweb screen panel, follow this comprehensive 7-step process:

Step 1: Identify the Machine

Locate the nameplate and record the model number
Note the serial number and manufacturing date
Count the number of decks and panels per deck
Photograph the nameplate with a ruler for scale

Step 2: Count the Number of Decks

A standard Stack Sizer may contain up to five decks
Count actual panels installed on one deck
Multiply by the number of operating decks
Check for partial-deck configurations or retrofits

Step 3: Measure the Existing Panel

Dimension	Measurement Method	Precision Required
Overall length	Vernier caliper or tape measure	±1 mm
Overall width	Vernier caliper or tape measure	±1 mm
Total thickness	Micrometer or caliper	±0.5 mm
Screening area length	Tape measure	±1 mm
Screening area width	Tape measure	±1 mm
Hook width	Vernier caliper	±0.5 mm
Hook thickness	Micrometer	±0.1 mm

Step 4: Verify Tensioning Direction

Side-to-side: Panel tension applied across the width
Front-to-back: Panel tension applied along the length
Drawbolt: Mechanical tensioning system
Metal hooks: Hooks on panel edges
Moulded polyurethane hooks: Integrated hook design

⚠️ Critical: A panel designed for one tensioning direction cannot be turned 90 degrees and installed in another system.

Step 5: Measure the Aperture Correctly

Use a microscope or optical measuring device for apertures <150 microns
Use a calibrated aperture gauge for apertures >150 microns
Refer to the original purchase record or panel label
Contact the OEM for specification sheets

Step 6: Photograph Product Markings

Part numbers (even partial numbers help)
Aperture markings (micron/mesh)
Manufacturing dates and batch numbers
Logos and brand markings
Direction arrows (feed/direction indicators)
Place a ruler next to the marking for scale

Step 7: Document Process Conditions

Material being screened (ore type)
Feed particle-size distribution
Required separation size (cut point)
Solids concentration (% solids)
Slurry temperature (°C)
Feed capacity (tonnes per hour)
Current screen service life
Problems such as blinding or premature wear

Procurement Guide

Required Information Checklist

Derrick Polyweb Screen Model ID in 5 Min 3

Item	Details Required	Why It Matters
Machine Model	Stack Sizer / SuperStack (specify model number)	Determines panel configuration
Number of Decks	How many decks in operation?	Determines total quantity needed
Panels Per Deck	Count actual panels installed	Prevents quantity errors
Panel Dimensions	Length, width, thickness (mm)	Ensures physical fitment
Aperture Size	Microns, mesh, or slot width	Determines cut size and efficiency
Tensioning Direction	Side-to-side / front-to-back / drawbolt	Determines compatibility
Hook Details	Metal or polyurethane hooks, dimensions	Ensures proper fixing
Material	Ore type, feed rate, slurry density	Determines polyurethane formulation
Required Quantity	Number of panels needed	Enables accurate quoting
Existing Service Life	Current panel life (months/tonnes)	Helps recommend material grade

Supplier Evaluation Checklist

Evaluation Criteria	Questions to Ask	Red Flags
Manufacturing Capability	Can the supplier manufacture according to drawings?	No design/engineering support
Material Quality	Can the supplier provide material reports and certifications?	No material traceability
OEM Compatibility	Can the supplier support OEM replacement with exact fit?	"Close enough" claims
Export Experience	Does the supplier have experience exporting to your country?	No export history
Wear-Life Recommendations	Can the supplier provide wear-life recommendations?	Generic recommendations only
Quality System	Is the supplier ISO 9001 certified?	No quality documentation

Key Buyer Questions

1. Can the supplier manufacture according to drawings?
The supplier should have design engineering capability to produce panels to your exact specifications.

2. Can the supplier provide material reports?
Request material test reports, hardness data, and wear resistance data for quality assurance.

3. Can the supplier support OEM replacement?
The supplier should offer OEM-compatible panels that match original fit, form, and function.

4. Does the supplier have export experience?
Ensure the supplier can handle international shipping, customs documentation, and packaging.

5. Can the supplier provide wear-life recommendations?
The supplier should recommend expected service life based on your specific application conditions.

Failure Analysis

Problem	Possible Cause	Recommended Solution
Premature wear at feed end	High feed velocity, impact loading	Install feed box; reduce feed rate; use reinforced panels
Premature wear at discharge end	Screen overload, improper feed distribution	Adjust feed distribution; reduce feed rate
Cracking (longitudinal)	Over-tensioning, structural overload	Reduce tension; inspect deck support; use reinforced panels
Cracking (transverse)	Impact loading, vibration imbalance	Install impact bars; check screen exciter
Blinding (fine particles)	Near-size particles, moisture content	Use non-blinding aperture design; increase spray water
Pegging (coarse particles)	Particles lodged in apertures	Install self-cleaning panels; adjust vibration frequency
Low screening efficiency	Incorrect aperture size, worn panels	Verify aperture measurement; replace worn panels
Poor fitment	Incorrect measurements, machine wear	Re-measure panel and deck; inspect deck support rails
Material mismatch	Polyurethane incompatible with process chemicals	Consult supplier for chemical resistance data
Installation failure	Incorrect tensioning direction	Verify tensioning system; train maintenance staff

Maintenance Guide

Daily Inspection Checklist

Check for visible panel damage (cracks, tears, missing sections)
Verify panel tension (check drawbolts or hooks)
Inspect for blinding or pegging
Record feed rate and slurry conditions
Check product quality (oversize/undersize distribution)

Weekly Inspection Checklist

Measure aperture wear at multiple points (±20% acceptable)
Check edge sealing and support rail condition
Inspect tensioning system for wear or damage
Review screening efficiency data (trend analysis)
Document panel condition with photographs

Monthly Inspection Checklist

Document panel wear patterns (photographs with scale)
Compare service life against baseline (months/tonnes)
Check deck alignment and support structure
Review spare parts inventory (minimum stock levels)
Schedule panel replacement if service life is near end

Replacement Timing Guidelines

Condition	Action	Timing
Apertures enlarged by 10–15% beyond specification	Schedule replacement	Within 2 weeks
Apertures enlarged by >15%	Immediate replacement	As soon as possible
Cracking or tears compromising structural integrity	Immediate replacement	Emergency
Screening efficiency drops below acceptable levels	Analyse root cause; plan replacement	Within 1 week

Case Study

Customer Type: Major Australian Iron Ore Processing Plant

Ore Type: Hematite iron ore fines (Banded Iron Formation)

Operating Conditions:

Feed rate: 350 tonnes per hour (24/7 operation)
Slurry density: 38–42% solids
Aperture requirement: 100 microns (±5 microns tolerance)
Operating hours: 8,760 hours per year (continuous)

Problem:
The plant experienced frequent screen panel failures, with panels lasting only 4–5 months on average. Three incorrect orders in 8 months resulted in extended downtime, expedited shipping costs, and lost production revenue exceeding $200,000.

Solution:
The plant implemented the comprehensive 7-step identification process:

Photographed nameplates on all 5 machines (25 decks total)
Counted 3 panels per deck (75 panels total)
Measured dimensions: 560mm × 350mm × 38mm
Confirmed side-to-side drawbolt tensioning
Verified aperture at 100 microns using optical measuring device
Documented part number: PW-100-560-B
Documented all operating conditions

Procurement Action:
Sourced high-wear polyurethane panels with enhanced wear-resistant formulation and OEM-compatible fitment.

Training Implementation:
Trained all maintenance staff on the 7-step identification process with SOP, measurement tools, and documentation system.

Results (12-Month Performance):

Metric	Before	After	Improvement
Panel service life	4–5 months	12–14 months	2.8× longer
Downtime per change	4 hours	1.5 hours	62% reduction
Incorrect orders	3 per year	0	100% eliminated
Screening efficiency	87%	95%	8% improvement
Annual panel consumption	180 panels	65 panels	64% reduction
Total annual savings	—	$242,000	—

"The 5-minute identification process has completely transformed our screen panel management. The $242,000 annual savings speaks for itself."
— Maintenance Manager, Major Australian Iron Ore Operation

Frequently Asked Questions

Q1: What is the most common mistake when identifying a Derrick Polyweb screen panel?
A: The most common mistake is ordering based on a photograph or an assumed model code without verifying physical dimensions and tensioning direction. Always measure the existing panel and confirm the fixing arrangement before placing an order.

Q2: How do I measure the aperture of a fine screen panel accurately?
A: Fine apertures (below 150 microns) require a microscope, optical measuring device, or calibrated aperture gauge. Do not rely on a standard ruler for fine-mesh screens.

Q3: Can I use a screen panel from one Derrick machine model on another?
A: Not necessarily. Different models may use different panel dimensions, tensioning systems, and aperture configurations. Always verify compatibility using the machine nameplate and existing panel measurements.

Q4: What information should I send to a supplier for a quotation?
A: Send machine nameplate photo, number of decks, panel count per deck, existing panel length and width, aperture size, tensioning direction, hook details, material and feed conditions, required quantity, and existing service life.

Q5: Should I send a used sample to the supplier?
A: For very fine apertures or uncommon fixing systems, sending a physical sample is the safest method. It allows the supplier to inspect actual dimensions, hook geometry, reinforcement structure, and aperture shape.

Q6: How long does it take to receive replacement panels?
A: Standard panels may ship within 2–3 weeks, while custom panels may require 4–6 weeks. Confirm with your supplier and factor this into your maintenance schedule.

Q7: What material options are available?
A: Common materials include polyurethane (standard, high-wear, non-blinding), rubber, and steel. Polyurethane offers the best combination of wear resistance, non-blinding properties, and service life for wet fine screening.

Q8: Can I get OEM-compatible panels at a lower cost?
A: Yes, many aftermarket manufacturers produce OEM-compatible panels at 20–40% lower cost. Ensure the supplier provides material reports and quality certifications.

Q9: How do I know if a panel is tensioned correctly?
A: Follow the machine manufacturer's tensioning specifications. For drawbolt systems, use a torque wrench and check tension regularly. A properly tensioned panel should feel firm across the entire surface.

Q10: What should I do if I cannot find any markings on the existing panel?
A: Take detailed photos with a ruler for scale, measure all dimensions, and contact the supplier with the machine model and process conditions. A sample may be required for accurate identification.

Q11: How often should I inspect my screen panels?
A: Perform daily visual inspections, weekly aperture measurements, and comprehensive monthly inspections with photographs and documentation.

Q12: What is the typical service life of a Polyweb screen panel?
A: 6–12 months typical, depending on application and operating conditions. Abrasive ores may reduce life to 3–4 months; less demanding applications may achieve 14–18 months.

Q13: Can polyurethane screen panels be repaired?
A: Minor damage can sometimes be repaired using polyurethane repair compounds. Significant wear or structural damage typically requires full panel replacement.

Q14: How do I choose between polyurethane, rubber, and steel?
A: Polyurethane for wet fine screening and non-blinding; rubber for coarse screening and impact; steel for high-temperature or dry screening. Consider lifecycle cost, not just initial price.

Q15: What is the difference between Stack Sizer and SuperStack panels?
A: Stack Sizer has up to 5 decks with standard sizes; SuperStack has up to 8 decks with larger footprint. Always verify the specific model and generation before ordering.

Conclusion

Identifying the correct Derrick Polyweb screen panel does not need to be a complex or time-consuming process. By following the comprehensive 7-step approach — checking the machine nameplate, counting decks, measuring the existing panel, confirming tensioning direction, verifying aperture size, photographing markings, and documenting process conditions — maintenance teams can ensure they order the right panel every time.

The combination of machine identification + physical panel measurements + process conditions is the most reliable method for accurate screen panel identification. Never order based solely on a photograph or an assumed model code. Five minutes spent verifying dimensions may prevent weeks of delays and unnecessary downtime.

For expert assistance with Derrick Polyweb screen panel identification and procurement, contact HUATAO Group — a leading manufacturer of OEM-compatible polyurethane and rubber screen panels for the mining and mineral processing industry.