Fatigued
|
A structural
failure of the filter medium due to flexing caused by cyclic differential
pressure. |
Ferrography
|
An
analytical method of assessing machine health by quantifying and examining
ferrous wear particles suspended in the lubricant or hydraulic fluid. |
Fick's Law of Diffusion
|
A law of chemistry and physics which states that the rate of diffusion of
one substance in another is proportional to the negative gradient of the
concentration of the first substance. |
Filter
|
A device that removes solid contaminants, such as dirt or metal particles,
from a liquid or gas, or used to separate one liquid from
another, or a liquid from a gas. The term filter describes the complete unit;
e.g., housing, filter element, and internal by-pass. |
Filter Breather
|
A
filtering unit for vented enclosures installed to prevent dirt and foreign
matter from entering the enclosure. Also prevents oil loss by retaining oil
droplets and draining the oil back to the sump. |
Filter Coalescing
|
A filtering system that combines three principles to filter out oil
aerosols: 1) Direct interception - A sieving action, 2) Inertial impaction -
Collision with filter media fibers, 3) Diffusion -Particles travel in a
spiral motion, presenting an effective frontal area thus capturing particles
within the filter medium. |
Filter Efficiency
|
The
ability of a filter to remove specified test contaminants under specified
test conditions from a specific test fluid, air, gas or liquid. Expressed as
a percentage of the quantity of test contaminant introduced into the inlet
of the filter test system. |
| Filter Element |
The
porous device which performs the actual process of filtration. |
| Filter Head |
An end
closure for the filter case or bowl that contains one or more ports. |
| Filter Housing |
The
external shell or enclosure that covers or protects the filter assembly.
|
Filter Inline
|
Inlet and outlet connections are located at the same level
on opposite sides of the filter or other device installed on the pipeline. |
Filter Life Test
|
A type
of filter capacity test in which a clogging contaminant is added to the
influent of a filter, under specified test conditions, to produce a given
rise in pressure drop across the filter or until a specified reduction of
flow is reached. Filter life may be expressed as test time required to reach
terminal conditions at a specified contaminant addition rate.
|
Filter Medium
|
The porous
material contained inside the filter to (a) separate the contaminants from
the incoming air, gas, or liquid. (b) separate the liquid from the gas.
Filter medium is usually made of paper, wire mesh, special cellulose, or a
combination. |
Filter Oil Bath
|
A labyrinth type filter having the active surfaces continuously splashed
with oil. Most pollutants are absorbed by the oil and when circulated
releases its pollutants that sink by gravity to the bottom of the oil pan. |
Filter Separator
|
A
filtering unit that separates solids and liquid droplets from gas (air) and
is widely used in removing oil from a gas or air. |
Filtration
|
The physical
or mechanical process of separating insoluble particulate matter from a
fluid, such as air or liquid, by passing the fluid through a filter medium
that will not allow the particulate to pass through it. |
| First Law of Thermodynamics |
The amount of work performed by or on a system is equal to the amount of energy
transferred to or from the system. |
Fixed Compression Ratio
|
The design (built-in) compression ratio for a rotary compressor having this
feature. |
Flange Connection
|
The means of connecting a compressor inlet or discharge
connection to piping by means of bolted rims (flanges). |
Flash Point
|
The lowest temperature to which oil must be heated under standardized
test conditions to: (a) drive off sufficient inflammable vapor, and (b) to
flash when brought into contact with a flame. Flash points of petroleum
based lubricants increase with increasing pressure. |
| Flexible Mounting |
Vibration isolation mount. Provides reductions in vibration transmission.
|
Flow
|
Volume of a substance passing a point per unit
of time; e.g., meters per second, gallons per hour, etc. |
Flow Control Valve
|
A
valve that controls the flow of air that passes through the valve. Used
often for retardation or timing circuits, but especially for regulating the
piston speed in cylinders. |
| Flow Diagram |
A schematic
flow sheet showing all controls involved with the system. |
Flow Meter
|
An instrument for measuring the amount of air flow of a compressor. Measured
in CFM. |
Flow Rate
|
The rate (in liters or gallons per minute, cubic meters or cubic feet per
second, or other quantity per time unit). Air related flows are usually
expressed in CFM, SCFM, ACFM, and ICFM. |
Fluidics
|
The general
subject of instruments and controls dependent upon low rate flow of air or
gas at low pressure as the operating medium. These usually have no moving
parts.
|
| Flushing |
A circulation process designed to remove contamination.
|
Forced Draft Fan
|
A fan
that delivers a flow of ambient air over the exterior of the finned pipes to
dissipate sensible heat. |
Fouling
|
Accumulation of foreign matter, such as mud or debris, in a cooler, pipe, or
valve. In a cooler, H2O DP and DT will be seen to increase, as well as CTD.
|
Free Air
|
Air at atmospheric conditions at any specified location,
unaffected by the compressor. |
Free Air Delivery (FAD)
|
Air at atmospheric conditions of the site and
unaffected by the compressor. Flow is measured at the discharge valve of the
compressor, following the aftercooler, water separator, and built in check
valve. Capacity and power consumption are corrected to ISO 1217 standard
reference conditions; e.g., Ambient temperature = °20C, Ambient pressure = 1 bar(a),
Relative humidity = 0%, Cooling water/air = 20°C, Effective working pressure
at discharge valve = 7 bar(a). |
Friction
|
Surface
resistance to relative motion, which slows down movement and causes heat.
|
| FRL |
Filter, Regulator, and lubricator sometimes combined in one unit. |
