16 · GLOBE RM410 PISTON AIR MOTOR MANUAL| INCLUDING AUXILIARIES | ATEX Certified
Performance regulation
2. Air flow regulation
Air flow regulation is the best way to reduce
the output speed without the loss of torque.
The air flow can be regulated with a throttling
device. By throttling, the starting torque
remains essentially the same but the torque
curve is steeper. This means that under the
same load fluctuation, the speed fluctuation
is smaller in comparison with the pressure
regulation. There is a distinction made
between the following installation positions:
Exhaust air throttling
The exhaust air throttling is the less optimal
way of throttling relating to the durability
and the air consumption. The advantage of
this method is that the rotational speed can
be regulated constantly in the lower rotation
range. In the border area of the rotation
range, a combination of supply- and exhaust
air throttling should be used. The exhaust
throttling should be used for controlling low
speed of rotation.
Supply air throttling
The supply air throttling generates better
results in relation to the durability, the running
smoothness and the air consumption.
With the regulation of the inlet pressure and the flow rate, the performance can be adapted to the
individual application. This is done by pressure or air flow regulation or a combination of both.
The compressibility of the air generates a dampening effect in all ranges. This allows that the motor
also can be started, while it is loaded. With a load reduction, the motor reacts immediately with an
increase in speed.
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Pressure regulation
Air flow regulation
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Pressure regulation
Air flow regulation
1. Pressure regulation
With pressure regulation the output power
can be adjusted. When the supply pressure is
decreased, the torque and power is reduced
proportionally and the torque curve becomes
flatter. The forces inside the motor are also
reduced, which increases its durability.
For optimal power and speed control, we advise to use the com-
bination of pressure and air flow regulation.
