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Ball cock

In the event of longer periods of standstill, the closed ball cock prevents leak losses to the following components and at the motor's control slide. It allows servicing to be carried out on the motor and the upstream components.

Socket dirt trap

To protect the valve units from soiling
Thread connection G1, G1½, G2
Housing made of nickel-plated brass
Stainless steel strainer
Mesh width 0.25 mm


The oiler is mounted in the pneumatic pipe and supplies the working air with an oil mist for lubrication and avoidance of corrosion of the control slide, the rotors and bearings.

Exhaust throttle and sound absorbers

The exhaust throttle can be used to throttle the exhaust air flow from the pneumatic motor, to reduce and adjust the motor speed.


The sound absorber with axial air outlet combines the requirements:

-          high blow-off quantity

-          short ventilation time

-          high sound absorption

It reduces the sound pressure level by approx. 10 to 15 dba

Maintenance unit

Comprises a humidity separator, pressure-reducing valve and oiler, and is situated between the ball cock and motor inlet.

The water separator in the water level indicator filters humidity out of the air in order to prevent icing up after air expansion in the motor casing and at the air outlet during permanent operation.

The working pressure, which should be as constant as possible, is set at the pressure-reducing valve. The oiler with oil level indicator supplies the working air with an oil mist for lubrication and avoidance of corrosion of the control slide, the rotors and bearings.


Spring pressure disc brake

The standstill holding brake keeps the drive in position under load with a pressure-less pneumatic motor.

It is opened pneumatically through a valve (4 bar) and closed using spring force when the pneumatic pressure is switched off.



A pneumatic coupling is used e.g. with emergency drives which are not designed to run all the time. In an emergency, the coupling is switched automatically and the pneumatic motor takes over the drive through the non-positive connected coupling. The coupling is opened using spring force and becomes non-positive under pneumatic pressure which is tapped from the measuring connections of the pneumatic motor.

As soon as the pneumatic motor delivers its torque, the coupling switches.


Planetary gears

Standard planetary gears can be connected downstream from the pneumatic motor. In terms of design, these coaxial gears are much smaller than the pneumatic motor and have very tight gear stages.

1-stage i= 3.08 - 7.25

2-stage i= 10.04 - 50.30

3-stage i= 60.00 - 320.00


Bevel helical gear

Bevel helical gears have an outlet offset by 90° to the pneumatic motor. With the outlet shaft either on the right, left or on both sides. Since the outlet is at a right angle, the pneumatic motor is at a right angle to the drive axis, whereby the design length (coaxial) is shortened.

Bevel helical gears have to be attached to the frame like the pneumatic motor for reasons of weight.

i= 4.4 - 730


Pneumatic switch cabinet

For applications with the pneumatic toothed wheel motors type DMO..., we have complete pneumatic control units available which are designed according to your requirements.

For example a pneumatic switch cabinet for an emergency function, to automatically put a furnace into the safety range through the pneumatic toothed wheel motor in the event of a main drive failing. All switching functions are available redundant to guarantee safety if a valve fails.

The final safety function is emergency manual operation which is also available.


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