A special type of oil free, positive displacement
reciprocating compressor, working without piston rings. The seal
between piston and cylinder wall is produced by a series of
labyrinths.
Lacquer
A deposit resulting from the oxidation and polymerization of
fuels and lubricants when exposed to high temperatures. Similar
to, but harder, than varnish.
Langelier's index
Is a technique for predicting whether water will tend to
dissolve or precipitate calcium carbonate. If the water
precipitates calcium carbonate, scale forming may result. If the
water dissolves calcium carbonate, it has a corrosive tendency.
lb
Pounds.
lb/hr
A volume. Pounds per hour.
Leak air
A crack or hole that accidentally admits a gas or lets it
escape.
Leak detector
ultrasonic
An instrument designed to detect the ultrasonic emissions and
convert them to audible signal.
Lift
The distance between the seat and disc seating surfaces when a
valve is open.
Linear actuator
Air cylinder
Liner
Filter parts that provide protection and support for the
filter media.
Liquid piston
A liquid piston compressor is a rotary compressor in which a
vaned rotor revolves in an elliptical casing, with the rotor
spaces sealed by a ring of liquid rotating with it inside the
casing.
Liquid ring
rotary compressor
A liquid piston compressor is a rotary compressor in which a
vaned rotor revolves in an elliptical casing, with the rotor
spaces sealed by a ring of liquid rotating with it inside the
casing.
Load
Electrical measurement. The output of one or several electric
machines. Load also denotes the power carried by a particular
circuit.
Loaded
A filter element so full of contaminants that no longer can
pass rated flow without excessive pressure differential.
Load factor
Ratio of the average compressor load during a given period of
time to the maximum rated load of the compressor.
Load time
Time period from when a compressor loads until it unloads.
Lobe
A type of journal bearing in centrifugal air compressors.
Low pressure coat
In spray painting, the process of applying the final coat of
paint at a lower air pressure. Used to uniform a finish or
blending.
Lubrication
A material (such as oil) used between moving parts of
machinery to make the surfaces slippery and reduce friction.
Lubricator
An instrument designed to add lubrication into the compressed
air line.
