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INCLINED SCREEN

GRAU GIS series inclined vibrating screens offer advanced screening performance for optimal material separation. Being widely used in mining, aggregate processing, recycling, and heavy-duty material handling GRAU Inclined Vibrating Screens have been engineers for high-efficiency and precise separation. They incorporate advanced features designed with operations in mind, easy maintenance, and easy transport, ensuring they meet a wide variety of requirements and can be easily retrofitted.

INCLINED SCREEN

GRAU INCLINED SCREENS

GRAU inclined vibrating screens are specially crafted with the operator in mind, emphasizing ease of use, simplified maintenance, and optimal performance. Our screens are designed to deliver the perfect circular motion for superior screening efficiency, regardless of material type or volume.

 

WHAT IS AN INCLINED VIBRATING SCREEN?

An inclined vibrating screen consists of a few screening decks (minimum 2) made as braced steel frames along the screen length, which are connected to side walls forming the main chassis of the screen, also referred to as the “screen box”.  The screen’s deck surface is angled to promote the movement of material, ensuring that particles travel across the screen with ease. This is the main reason this type of screens in called “inclined”. The surface of each deck is covered with different types of meshes (woven wire, polyurethane, rubber, anti-clogging or pitched steel plates) with small holes that represent what size material passes through the screen onto the lower deck. The material that doesn’t fall to the deck below is screened off as per size of the mesh.

 

HOW DO INCLINED VIBRATING SCREENS WORK?

The inclined vibrating screens are powered by an electric motor that rotates eccentric drive mechanisms on both sides of the screen, connected by a shaft (cardan shaft in GRAU GIS series). These counterweights generate powerful circular vibrations that allow smaller particles to pass through while larger particles are carried over the screen deck surface. Screened material gets separated into {number of decks} + 1 flows and each flow gets discharged into different chutes.

WHAT ARE THE INCLINED VIBRATING SCREENS USED FOR?

  • Screening
  • Sizing
  • Separating
  • Grading
  • Shifting
  • Washing

WHAT ARE THE MAIN APPLICATIONS OF INCLINED SCREENS BY GRAU?

GRAU inclined vibrating screens offer versatile solutions across numerous industries:

  • Aggregate Processing: GRAU inclined screens separate aggregates like sand, gravel, and crushed stone with precision, delivering well-graded materials for construction.
  • Mining: Ideal for sorting valuable minerals, GRAU inclined screens handle heavy-duty materials like coal, iron ore, and precious metals with high efficiency.
  • Recycling: GRAU inclined screens aid in sorting mixed materials, improving recycling rates and reducing contamination.
  • Chemical Processing: GRAU inclined screens support separation needs in the chemical industry, reducing waste and enhancing quality control.
Why GRAU INCLINED SCREEN?
  • 01
    RELIABLE
  • 02
    MODULAR DRIVE SYSTEM
  • 03
    HUCK-BOLT DESIGN
  • GRAU INCLINED SCREENS
    GRAU INCLINED SCREENS
    GRAU GIS series inclined vibrating screens offer efficient material separation for mining, aggregate processing and recycling sectors. They feature perfect circular motion, modular drives, huck-bolt design, and various screen media options. Models vary in deck dimensions, number of decks, motor power, and weight, with options prepared for wet processing.
  • Transport-Friendly Subframe
    The optional transport-friendly subframe makes transporting and installing GRAU inclined screens seamless, ensuring that ay screen box can be easily transported and installed/retrofitted without compromising on stability or durability.
    Transport-Friendly Subframe
  • Adaptable for Modular Screen Media
    Adaptable for Modular Screen Media
    GRAU inclined screens can easily adapt to various types of screen media, including polyurethane panels, screen mesh, anti-clogging mesh, wear-resistant pitched plates and modular type pinned screen media. This enhances flexibility, allowing the screen to be customized to suit different materials and applications.
  • Durable Wear Plates in Feeding Zone
    Our vibrating screens are equipped with high-strength wear plates in the feeding zone, providing enhanced protection against abrasion and extending the lifespan of the equipment in high-impact areas.
    Durable Wear Plates in Feeding Zone
  • Modular Drive System for Easy Transport and Servicing
    Modular Drive System for Easy Transport and Servicing
    GRAU modular drive system simplifies transportation and servicing, allowing operators to remove and reassemble drive system components quickly. This modular approach not only eases and reduces the transport cost but also cuts downtime and reduces on-site maintenance costs.
  • Self-Tensioned Motor Base
    Our self-tensioned motor base reduces vibrations and minimizes stress on the drive components, especially during the start-stop cycles, extending the life of the motor and maintaining consistent, high-powered operation.
    Self-Tensioned Motor Base
  • Prepared for Wet Processing
    Prepared for Wet Processing
    GRAU inclined screens come with pre-cut holes that allow for straightforward conversion to washing configurations. This feature makes it simple to add water nozzles and adapt the screen for wet processing, enhancing material processing capabilities. GRAU GIS Wet inclined screens ensure efficient removal of unwanted fines, silt, and clay from aggregates and minerals, providing cleaner, high-quality output.
  • Huck-Bolt Design for Maximum Durability
    The Huck-bolts don’t get lose. This setup doesn’t require frequent tightening of bolts which provides unmatched structural integrity, ensuring GRAU inclined screens maintain durability and performance across years of continuous use.
    Huck-Bolt Design for Maximum Durability
  • Side Snubbers to Eliminate Side Movements
    Side Snubbers to Eliminate Side Movements
    Side snubbers on GRAU inclined screens prevent unwanted lateral movement, ensuring stable, controlled operation and reducing wear on the bearings and screen structure over time.
PRODUCT HIGHLIGHTS
Tips for Choosing and Setting Up Inclined Vibrating Screens
1. Screen Size and Capacity: Consider the screen’s size and capacity in relation to the volume of aggregate processed and the quantity of end products you need. Larger screens can handle more material, but make sure it aligns with your plant’s production requirements to avoid bottlenecks or overuse of power.
Tips for Choosing and Setting Up Inclined Vibrating Screens
2. Decide the Number of Decks: Decide on the number of decks based on your needs. Multi-deck screens allow for separating aggregates into multiple size fractions in one pass, enhancing operational efficiency and reducing the need for additional screening equipment. Especially pay attention to gradation of material as uneven distribution of fractions will cause material mixing and ineffective screening. Make sure you let the engineers know as much as possible about your material and application.
Tips for Choosing and Setting Up Inclined Vibrating Screens
3. Washing and Moisture Handling: Moisture in aggregates can cause blinding, where material sticks to the screen and blocks it. Consider using anti-clogging and self-cleaning screens for dry screening of wet and sticky material or consider adding wet processing. Make sure the screen can be rearranged for washing applications in the future when required.
Tips for Choosing and Setting Up Inclined Vibrating Screens
4. Screen Media Type: The choice of screen media (wire cloth, polyurethane, rubber, etc.) impacts durability and performance. Steel woven wire cloth provides precision in sizing and provides the highest utilisation of the screening area, while rubber or polyurethane media can be better for wet/abrasive materials and washing applications and can help reduce blinding and wear. But keep in mind that polyurethane panels reduce the effective screening area.
Tips for Choosing and Setting Up Inclined Vibrating Screens
5. Inclination Angle: The screen’s inclination angle affects material flow and stratification. Generally, an angle between 15 to 25 degrees is common, but this varies depending on the material type and required screening efficiency. Make sure the screen you choose is adjustable for tuning and performance.
Tips for Choosing and Setting Up Inclined Vibrating Screen
6. Vibration Frequency and Amplitude: Check if the screen offers adjustable vibration frequency and amplitude. These features can help customize the screen’s operation for different material sizes and moisture levels, improving separation efficiency.
Tips for Choosing and Setting Up Inclined Vibrating Screens
7. Maintenance Accessibility: Choose a screen design that makes maintenance easy. Removable panels, easy-to-access bearings, and quick screen media replacement options reduce downtime and maintenance costs.
Features and Options
Maintenance Tips: Monitor Vibration Frequency and Amplitude
  • Maintenance Tips: Monitor Vibration Frequency and Amplitude
    Maintenance Tips: Monitor Vibration Frequency and Amplitude
    Variations in vibration patterns may indicate issues with the motor or drive components. Monitoring frequency and amplitude at each side of the screen can help identify and resolve potential issues before they become critical. Please speak to one of our engineers if you would like to learn how to do it.
Maintenance Tips: Regularly Inspect Screen Media for Wear
  • Maintenance Tips: Regularly Inspect Screen Media for Wear
    Maintenance Tips: Regularly Inspect Screen Media for Wear
    Frequent checks for wear and tear in screen media prevent material leakage and inefficiency. Replacing worn sections prolongs the life of the screen and improves separation quality.
Maintenance Tips: Lubricate Bearings and Drive Components
  • Maintenance Tips: Lubricate Bearings and Drive Components
    Maintenance Tips: Lubricate Bearings and Drive Components
    Bearings and drive mechanisms should be lubricated as recommended in our manual to prevent excessive wear. High-temperature and heavy-duty lubricants can offer added protection for intense applications.
Maintenance Tips: Inspect and Clean the Screen Surface Regularly
  • Maintenance Tips: Inspect and Clean the Screen Surface Regularly
    Maintenance Tips: Inspect and Clean the Screen Surface Regularly
    Material buildup can reduce screening efficiency. Regular cleaning, especially for sticky or damp materials, ensures maximum throughput and extends screen life.
Maintenance Tips: Check for Loose Fasteners and Bolts
  • Maintenance Tips: Check for Loose Fasteners and Bolts
    Maintenance Tips: Check for Loose Fasteners and Bolts
    While the main frame is fixed with huck-bolts, vibration over time can loosen bolts and fasteners of screen tensioning fixings. Regularly inspecting and tightening these elements ensures structural integrity and reduces unexpected downtimes.
SPECIFICATION

MODEL

Deck Dimensions

Decks

Motor Power

Weight

Wet Processing

mm

ft

kW

HP

kg

lbs

GIS 1240D2

1200x4000 4'x13' 2 7.5 10 3155 6955 Prepared

GIS 1240D3

1200x4000 4'x13' 3 7.5 10 3960 8730 Prepared

GIS 1240D4

1200x4000 4'x13' 4 7.5 10 4465 9840 Prepared

GIS 1540D2

1500x4000 5'x13' 2 15 20 4255 9380 Prepared

GIS 1540D3

1500x4000 5'x13' 3 15 20 4860 10715 Prepared

GIS 1540D4

1500x4000 5'x13' 4 15 20 5365 11825 Prepared

GIS 1650D2

1600x5000 5.25'16.5' 2 15 20 4855 10705 Prepared

GIS 1650D3

1600x5000 5.25'16.5' 3 15 20 5560 12255 Prepared

GIS 1650D4

1600x5000 5.25'16.5' 4 15 20 6565 14475 Prepared

GIS 2050D2

2000x5000 6.5'x16.5' 2 18.5 25 6055 13350 Prepared

GIS 2050D3

2000x5000 6.5'x16.5' 3 18.5 25 7060 15565 Prepared

GIS 2050D4

2000x5000 6.5'x16.5' 4 18.5 25 8265 18220 Prepared

GIS 2060D3

2000x6000 6.5'x20' 2 18.5 25 6655 14670 Prepared

GIS 2060D3

2000x6000 6.5'x20' 3 22 30 7960 17550 Prepared

GIS 2060D4

2000x6000 6.5'x20' 4 22 30 8865 19545 Prepared

GIS 2460D3

2400x6000 8'x20' 3 30 40 8260 18210 Prepared

GIS 2460D4

2400x6000 8'x20' 4 30 40 10565 23290 Prepared
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