|
| De-superheater |
| |
A device for removing the excess heat in steam as its pressure is reduced.
|
|
| De-vent |
| |
To close the vent connection of a pressure control valve permitting the valve to function at its adjusted pressure setting.
|
|
| Deadband |
| |
The region or band of no response where an error signal will not cause a corresponding actuation of the controlled variable.
|
|
| Decompression |
| |
The slow release of confined fluid to gradually reduce pressure on the fluid.
|
|
| Deficient (deficiencies) |
| |
Short of certain nutrients.
|
|
| Dehusked |
| |
To remove the outer layer (chaff) on grain.
|
|
| Delta |
| |
The amount of change in a number, size or position.
|
|
| Density |
| |
When applied to feed rations, describes the amount of nutrients within a measurement unit of the total ration.
|
|
| Diet |
| |
The total amount of feed ingredients (or mixture of ingedients) and drink for an animal.
|
|
| Differential current |
| |
The algebraic summation of the current in the torque motor; measured in MA (milliamperes).
|
|
| Differential cylinder |
| |
Any cylinder in which the two opposed piston areas are not equal.
|
|
| Diffusion |
| |
Movement of moisture from areas of high to low concentration or temperature.
|
|
| Digestible |
| |
Ration easily digested by the animal.
|
|
| Digestible Dry Matter (DDM) |
| |
Is an estimate of digestible fibre in a forage sample. Different formulas are used to calculate this value depending on the laboratory.
|
|
| Digestible Energy (DE) |
| |
Is the gross intake energy minus the fecal energy. An indication of the actual amount of energy the animal has available for use.
|
|
| Digestible Protein (DCP) |
| |
The amount of crude protein actually absorbed by the animal (crude protein minus the protein lost in feces).
|
|
| Digestion |
| |
Refers to all changes that feed undergoes within the digestive tract, with the end result being that the broken down products are absorbed from the digestive tract for use by the animal.
|
|
| Diluent |
| |
An edible substance used to mix with and reduce the concentrate of nutrients and/or additives to make them more acceptable to animals, safer to use and more capable of being mixed uniformly in a feed.
|
|
| Directional valve |
| |
A valve which selectively directs or prevents fluid flow to desired channels.
|
|
| Displacement |
| |
The quantity of fluid which can pass through a pump, motor or cylinder in a single revolution or stroke.
|
|
| Dither |
| |
A low amplitude, relatively high frequency periodic electrical signal, sometimes superimposed on the servo valve input to improve system resolution. Dither is expressed by the dither frequency (Hz) and the peak-to-peak dither current amplitude (ma).
|
|
| Double sheave |
| |
A pulley block with two grooved wheels.
|
|
| Drain |
| |
A passage in, or a line from, a hydraulic component which returns leakage fluid independently to reservoir or to a vented manifold.
|
|
| Drive pulley |
| |
The first of a train of wheels, giving motion to the rest.
|
|
| Dry feeds |
| |
Complete feeds, hay and supplements - feeds that are around 90% dry matter.
|
|
| Dry matter (DM) |
| |
Total weight of feed minus the weight of water in the feed, expressed as a percentage. Also referred to as: dry, dry basis, dry result or moisture-free basis.
|
|
| Dry Matter Intake (DMI) |
| |
All the nutrients contained in the dry portion of the feed consumed by animals.
|
|
| Dryers |
| |
Dryers/Coolers reduce the temperature of feed pellets to ambient(or less) and/or reduce the moisture content to 10-12%(or less). Two basic types exist, horizontal and vertical.
|
