3.6.1 Speed range
The compressor may be driven :
• Directly by a PTO shaft
• By belt /pulley arrangement
• By hydraulic transmission
• By an internal combustion engine or electric motor.
The selection of the drive mode will take into account :
• The compressor mounting configuration
• The driving shaft rotation direction
• The expected power requirement for the given applica-
tion
• The acceptable rpm range for the driving equipment
• The acceptable rpm range for the compressor.
The use of compressors outside of their operating
speed range can lead to property damage or serious
injuries. See central IOM.
The non balancing of the drive shafts can lead to
mechanical ruptures that are susceptible of causing
important property damage and/or serious injuries.
Not following assembly instruction can lead to
mechanical ruptures that may create major property
damage and/or serious injuries.
In all cases, the drive must make it possible :
• To maintain the compressor rotation speed during load
variations (pressure variations).
• Not to subject the compressor to sudden or insufficient
starts/stops.
3.6.2 PTO shaft drive
It is mandatory to comply with the following instructions :
• The shaft must be dynamically balanced.
• Its length and its angle must be as small as possible,
see table.
• The drive shaft slides perfectly well during rotation.
• The jaws of the universal joints are parallel.
• Coupling flanges show no eccentricity nor warping of
the bearing surface.
• The angle formed by the universal joint and the drive
shaft must not exceed 15°.
• The compressor shaft must be parallel to that of the
drive shaft.
To protect the P.T.O in the event of compressor stalling,
it is necessary to install a torque limiter.
The MOUVEX company shall not be held responsible for
damage resulting from such stalling if this stalling is
caused by wrong manipulation with the compressor or if
a wrong torque limiter is installed.
See Instructions 1401-B00 T
ORQUE
LIMITER
-
SCREW
COM
-
PRESSORS
.
If the greasing instructions for the universal joint are
not respected, this can lead to ruptures of this uni-
versal joint, as well as property damage and serious
injuries
3.6.3 Belt / pulley arrangements
The pulley ratio is determined according to the
P.T.O speed and the compressor speed.
To determine the types of belts and pulleys, refer to the
manufacturer ’ s recommendations.
You must observe the following installation rules :
• The shaft supporting the driving pulley must be per-
fectly parallel with the compressor shaft.
• Pulleys must be correctly aligned.
• Belts shall be sufficiently tensioned to avoid any
slack or slide.
• The belts must be able to pass the power consumed
by the compressor.
_________
A =
√
H² + W²
L
If H = Zero, A = W / L
If W = Zero, A = H / L
A
Universal joint angle
0,017
1°
VERY GOOD
0,035
2°
0,052
3°
0,070
4°
0,087
5°
0,105
6°
GOOD
0,125
7°
0,141
8°
0,158
9°
0,176
10°
0,194
11°
LIMIT
VALUES
0,213
12°
0,231
13°
0,249
14°
0,268
15°
CAUTION
CAUTION
12/18
NT 1401-AL00 10 20 (2) MX12 e
3. INSTALLATION (continued)
