Peterson Corp. News


Conveyor Length

Conveyor lengths on stacking conveyors range from 74' 1" (2278 cm) to 77' 5" ( 2360 cm).

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Conveyor Width

On the TS4280 and the TSR4280 stacking conveyors the width of the conveyor is 42" (107 cm).

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Stockpile

A stockpile is a built up pile of finished material that is formed by the discharge conveyor. The size of the stockpile is dependent on how tall and angle of the conveyor.

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Stockpile Height

The height of a stockpile helps determine the amount of material that has been processed through a machine and stacked by a conveyor.

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Stockpile Volume

Stockpile volume is a measurement of the piled material to quantify how much material was processed.

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Stockpile Mass

Stockpile mass is the weight measurement of the stockpile. This is measured in cubic tons.

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Discharge Height

The discharge height is the maximum height of the conveyor while fully extended.

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Angle of Repose

The angle of repose is the steepest angle of a pile of organic material without slumping. The angle of repose varies between material types and has an impact on stockpile volumes and dimensions.

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Luffing

Luffing is the angle that the stacking conveyor is placed at, which then determines the dimensions of the stockpile that is being made. Depending on the type of material being screened, the pile may need to be at a lower …

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Throughput

Throughput is the amount of material that passes through a machine during a given amount of time. It is often measured in cubic yards per hour. Peterson calculates throughput values using the amount of material put into the machine.

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Angle of Repose

The angle of repose is the steepest angle of a pile of organic material without slumping. The angle of repose varies between material types and has an impact on stockpile volumes and dimensions.

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Conveyor Length

Conveyor lengths on Terra Select Screens vary in size from 6' 7" (200 cm) to 23' 7" (720 cm), depending on the specific machine being used. The optional extra long conveyor belt extends to 26' 5" (806 cm).

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Cubic Yards

Cubic yards is a measurement of material processed through a screen.

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Rotation Speed

Rotation speed refers to the speed at which a trommel drum or stars in a star screen turn.

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Stockpile Height

The height of a stockpile helps determine the amount of material that has been processed through the screen.

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Stockpile Mass

Stockpile mass is the weight measurement of the piled material. This is measured in cubic tons.

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Stockpile Volume

Stockpile volume is a measurement of the piled material to quantify how much material was processed through the screen.

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Drum Size

The size of the drum is determined by the diameter and length of the drum. The T30 Trommel Screen has a diameter of 5' 3" (160 cm), and the T60 and T70 have diameters of 7' 3" (220 cm).

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Fractions

Fractions are the separated material sizes. Common screening machines provide two or three fraction material size separation.

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Stockpile

A stockpile is a pile of finished material that is formed by the discharge conveyor. The size of the stockpile is dependent on how tall and what angle the conveyor is at.

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Throughput

Throughput is the amount of material that passes through a machine during a given amount of time. It is often measured in tons or tonnes per hour but can also be measured in cubic yards or meters per hour. Peterson calculates …

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Gross Combined Vehicle Weight (GCVW)

Gross Combined Vehicle Weight (GCVW) is the combined weight of the trailer, tractor, passengers and cargo. It differs from the GVWR because it includes the weight of the trailer as well.

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Throughput

Throughput is the amount of material that passes through a machine during a given amount of time. It is often measured in cubic yards per hour or a similar format. Peterson calculates throughput values using the amount of material input …

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Angle of Repose

The angle of repose is the steepest angle of a pile of organic material without slumping. The angle of repose varies between material types and has an impact on stockpile volumes and dimensions.  

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Approach Angle

The approach angle is the angle of the grinder body to the ground. This approach angle impacts maneuverability, clearance for loading/unloading onto a low-boy trailer, and it's off-road capabilities.

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Ton vs. Tonne

Ton vs. Tonne: A Ton (sometimes referred to as a short ton) is an American weight totaling 2,000 pounds (907.19 kg). A tonne or metric ton (t) is a weight totaling 1,000 kilogram or 1 megagram. 1 tonne = 2,204.6 lbs …

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Rotor Speed

The rotor speed, rotational speed of the rotor, is usually measured in rotations per minute (rpm) or tip speed in feet per minute.

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Feed Speed

On a horizontal grinder the feed speed is the rate of speed that the feed chains move the material from the hopper into the grinding chamber.

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Chip Quality Index (CQI)

The Chip Quality Index (CQI) is the measurement which all chips are evaluated against post processing. The CQI is where money is made. By measuring chips against the CQI chip producers can determine value and potential profit based on consistency. To be …

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Chip Thickness

Chip thickness is the measurement of how a chip is split. It is typically well correlated with chip length but not always. Thickness is the principal factor impacting paper pulping effectiveness (liquor or pulping chemical penetration, and time required in …

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Chip Length

Chip Length is the measured dimension of a chip from cut edge to cut edge. Chip length is used to control chip thickness. Longer chips tend to be thicker, shorter chips--thinner.

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Chip Classifier

A chip classifier is a mechanical device used to determine the distribution of chips across a length and thickness range. The most common classifiers use a series of trays with bar slots to sort on thickness and punch plate to …

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Knife Velocity

Knife velocity measures the speed in feet per minute as a result of disc or drum diameter, engine rpm, and sheave dimensions. The best chip quality is produced in a range from 5500 to 6000 ft (1676.4 to 1828.8 m) …

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Knife Length

Knife Length is the total distance from the back of the knife (Babbitt) to the tip of the cutting surface.

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Knife Extension

The knife extension is the distance between the blade, or edge of the knife and the surface of the drum or face of the disc. The knife extension at each pocket on the drum should be the same in order to …

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Knife Angle

The angle at which a knife or blade is sharpened, or adjusted, to interact with the feedstock material. Knife angle can be adjusted with babbitted inserts, or set screws.

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Gap

Gap is the diagonal measurement from the sharp edge of the chipper disc knife down to the nearest point on the face plate surface. This measurement is sized to correspond to chip size and desired length. Typically set to 1/16″ …

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Flail Speed

The flail speed is the rotation speed of the flail chains in rotations per minute (rpm). Flail speed may be adjusted to reflect wood type, climate and other factors affecting bark removal. Flail direction can also be adjusted by the …

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Feed Speed

Feed speed measures the distance in feet per minute the wood is being driven toward the chipping disc or drum. The roll case rollers, and powered feed rollers, are adjusted to set the desired feed speed. Feed speed is calculated …

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Cubic Feet per Minute (CFM)

Cubic Feet per Minute (CFM) is a measurement of volumetric flow, or velocity of air flow, used by manufacturers of blowers and fans.

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Gross Vehicle Weight Rating (GVWR)

The Gross Vehicle Weight Rating (GVWR) is the maximum operating weight of a vehicle, including fuel, driver, and cargo but excludes the weight of a trailer. See Gross Combined Vehicle Weight (GCVW)

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PSI (Pounds per Square Inch)

Blowing pressure is measured in PSI, a unit of pressure measuring pound-force per square inch. Alternative measurements are ksi (kilopound per square inch) or bar (14.5038 psi). Peterson’s blower trucks use a kunkle valve to regulate the PSI of our systems.

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