DEFINITION – ARTI – PENGERTIAN AIRLESS SPRAYING

AIRLESS™ SPRAYING
Airless™; Pulvérisation airless
Painting
Syn. with AIRLESS ™SYSTEM
AIRLESS™ SYSTEM
Airless™; Pulvérisation airless
Painting
Painting with an atomizer squirt gun that
pulverizes the paint to a strong pressure (50 up to
200 bars) on a substrate. Syn. with AIRLESS™
SPRAYING
AIR-LIFT PUMP
Emulseur
Equipment and Tools
A metal pipe of diameter between 150 and 300
mm that encloses a pipe of diameter 20 to 60
mm. The pump is suspended from the boom of a
crane.
The insufflation of compressed air in the inner
pipe, approximately 30 cm above the base of a
vertical tube filled with a liquid, produces a
release of bubbles that increase and dilate as the
pressure decreases. The mixture (water +
sediments + air) thus emulsified has a density
weaker than that of the ambient liquid and is
subjected to an upward force, producing at the
base of the tubing strong suction of the sediment
loaded liquid.
The air-lift pump is mainly used:
to clean sewage or loose materials (sludge,
sand, and pebbles) out of cased piles, cofferdams
or vibrodriven piles;
drilling into water after setting up an inlet
filter, its function is to eliminate fines and to
clean the wall of a drilling so as to obtain
maximal water flow without risk of clogging;
a sounding tube of piles whose base has been
cored or perforated to improve water clearness
before a television camera is passed through, to
clean sediment or mud out of a cavity before it is
injected.