Ransburg MMA-570 Direct_Ind Charge Atomizer A13366 - Manual (Page 43)

BEARING AIR ADJUSTMENT
The nominal bearing air pressure is 90 psi (620.5
kPa), measured at the rear of the atomizer. Mini-
mum pressure is 80 psi (551.6 kPa) and maximum
pressure is 100 psi (689.5 kPa). The turbine
should never be operated with less than 80 psi
(551.6 kPa) bearing air pressure.
Bearing air must be present when turning the
turbine on. Bearing air must remain on when
the turbine air is turned off until the turbine stops
spinning. Never turn off bearing air to cause the
turbine to stop spinning. If connected, brake air
can be used to slow the turbine.
The MMA-570 is equipped with a bearing air return
line to monitor bearing air pressure at the mounting
manifold. When connected to the remote speed
controller, operation of the turbine will automatically
be shut down whenever the bearing air pressure
falls below the setting of 80 psi (551.6 kPa).
CUP WASH
It is recommended for water based material that
heated solvent be recirculated at the rear input of
the atomizer (140°F, 60°C). Typical wash solvent
is di-water and amine (8-10% solution).
W A R N I N G
!
C A U T I O N !
NOTE
† The bell rotational speed determines
the quality of atomization and can be var-
ied for various paint flow rates and paint
formulations. For optimum transfer effi-
ciency and spray pattern control, the bell
rotational speed should be set at the min-
imum required to achieve proper atomi-
zation. Excessive speed reduces trans-
fer efficiency!
† DO NOT exceed the maximum rated
operating speed and turbine inlet pressure.
Excessive speed may cause air turbine dam-
age or damage to the bell.
† Bearing air MUST be ON and supplied at
a minimum of 80 psig (551.6 kPa) whenever
the turbine is operated. If not, severe bear-
ing damage will occur. It is recommended
that bearing air be left turned on at all times,
except during maintenance or disassembly.
† Bearing damage (and subsequent tur-
bine failure) caused by running the turbine
without bearing air WILL NOT be covered
under the Ransburg warranty.
MMA-570 Direct/Indirect Charge - Operation
Ransburg
LN-9279-13 40