Civil engineering equipment

1. FAHIR M.I.M
132415V

2. FAHIR M.I.M
132415V

3. Introduction
 Plaster spraying allows a
plasterer to skim a drywall
more than five times faster
than using a hand float to
apply it. Although classic
gypsum-based plaster can be
sprayed if it is "spray grade,"
most plaster sprayers prefer
the organic-based pre-mixed
plaster packaged in a plastic
bag because the plaster
spraying machine does not
need to be cleaned out after
the job is finished, providing
that plaster is kept moist.

4. Types of Plastering Machines
 Plaster sprayers are of three types:
 Worm-drive pump
 Peristaltic pump
 Piston pump

5. Worm-drive pump
Most commonly, sprayers have a worm-drive pump that
pumps the plaster up to a spray gun that has a large
nozzle, usually 4 to 8 mm, that extrudes the plaster into
a chamber on the end of the gun.

6. Peristaltic pump
There are a few plaster sprayers that have a peristaltic
pump (a tube squeezed by rollers) which also requires
compressed air to produce a spray. These types of plaster
sprayer can also spray textured coatings with particle
sizes up to about 3mm diameter, providing that they are
not solvent based.

7. Piston pump
Newer types of plaster sprayer have a piston pump,
which has sufficient pressure to spray smooth
(untextured) plaster without compressed air.