Air Motors
Customized drive solutions
n compactn service friendly
n stainless steel
n lightn ATEX conformn robust
n overload safen reversiblen sterilisable

D6000E 06.2024

OVERVIEW

Fields of application and application examples for Air Motors

Pages 3 - 5

What distinguishes DEPRAG Air Motors from the rest?

Pages 6 - 7

Advantages of Air Motors

Page 8

Our Product spectrum

Pages 9 - 13

• Product spectrum: Tooth Gear Motors• Product spectrum: Turbines• Product spectrum: Air Vane Motors• BASIC LINE: Low cost air motors for normal production environment• ADVANCED LINE: Stainless steel motors• POWER LINE: High performance air motors• INDIVIDUAL LINE: Great value customisations• Air Vane Motors for special applications– Drilling, milling and grinding motors– Air motors with integrated holding brake– Gear motors

Speed regulator

Page 13

Technical Information about Air Vane Motors

Pages 14 - 17

• Function of the air vane motor• Air quality and oil-free operation• Explosion prevention• Comparison of drive principles• Characteristic curve of the air vane motor

Selecting your Air Motor for your application

Pages 18 - 25

Infinite variable regulation of the air pressure or air volume

Page 26

Installing your Air Vane Motor

Page 272

Fields of application for air motors
Diverse design models, simple construction, light performance weight, high speed ranges and explosion safety – this ensures that air
motors can be used in a wide spectrum of applications.
DEPRAG air motors – whether vane motors, turbine motors or tooth-gear motors – are employed in almost all sectors of industry.

Medical technology
pharmaceutical industry• sterilisable• light – small• high performance• reliable• long life-span• oil-free operable• easy maintenanceFood processing industry

Paper industry• stainless steel design• high performance• reliable• long life-span• easy maintenanceFoundries, iron works andpower plants• ATEX conform• high performance• long life-span• easy maintenance• robust

Machine construction• non-corrosive• insensitive to vibrations• ATEX conform• robust• easy maintenance

Automobile industry• ATEX conform• high performance• long life-span• easy maintenance• robust

Chemical industry• ATEX conform• resistant to cleaning agents• insensitive to acids• high performance• long life-span• easy maintenanceAir tools• ergonomic• robust• easy maintenance• long life-span• high performance• oil-free operable

Agitator motors,
transport and materials handlingtechnology and much more…

• food industry conform• sealed• resistant to cleaning agents• oil-free operable• highest reliability

Ship building,underwater usage• ATEX conform• high performance• robust• easy maintenance

We have the right custom made drive solution for your individual application… no matter whether air vane motor, tooth-gear motor or turbine… irrespective of your required material, we will provide you withthe best value for money customisation.
3

Application examples air vane motors
High performance in the smallest
of spaces…
is achieved by the resilient air motor which
drives the milling head of a sanitation robot
under the extreme conditions of drain sanitation.

Move a parked aircraft by hand!
Moving heavy rolls of paper, railway
wagons, and even parked aircrafts byhand may sound like magic, but it ishumanly possible: The unassuming "Easy
Roller" works just as its name implies. With
this device, you can easily maneuver up to
100 tons without exerting great effort.

Drive solution for the paper production
Acid- and heat-insensitive stainless-steel
motors for difficult requirements.

Drive Technology for the Fruit-Juice
Production Industry
For the stirring and mixing of fruit juices,
we offer a robust and reliable ADVANCED
LINE air-motor made from stainless steel
with a power output of 300 watts. This
motor drives the propeller of a magnetic
agitator.

ATEX conform complete system:
Air motor - brake - gear
Wilfried Beer, managing partner of Beer
Fördertechnik:”By using this complete system for my vat
drainage equipment I can save myself
enormous additional construction andmanufacturing expenses because thebrakes which provide the safety for mymechanism are already integrated.”4

Application examples of turbines and gear motors
The different application
areas of the turbine
The DEPRAG gas expansion turbine
recovers energy, meaning that even small
amounts of residual process gas can beutilised. This means that energy recovery
with the latest technology is an option formany sectors of industry.

Energy recovery inenergy-intensive
industrial processes

Using a turbine for an aircraft emergency door
The pyrotechnic ignited, indirect turbine
drive with reduction gearing is used for the
PYROTAK emergency door system.
This system offers a high power-output by
a very small-sized turbine.

Example: Turbine grinding machine
A two-stage curtis-turbine is used for thisturbine grinder.
When compared to multi-stage overpressure turbines, this grinder has a simple layout and is especially cost effective.
The deciding advantage for this applicationis the extreme low weight.

Application: Turbine grinder
Use of a high-speed turbine in a turbine
grinder.

Application example of gear-motors
An application example is the use of gearmotors in high-speed midget grinders forthe deburring of molds and dies and forthe fabrication of non-metallic materials
with high cutting speed.

5Energy recovery fromresidual energy inpower stations

Energy recovery throughgas expansion in thenatural gas network

What distinguishes DEPRAG Air Motors from the rest?
FULL SERVICE
Whether you need an integrated motor
from our comprehensive programme cata­­­­logue, your own individual air motor, a package solution, a ready-to-sell end productor a fully automated assembly system –DEPRAG is your business partner.

SHORT DELIVERY TIMES
Due to our large amount of in-house production we are able to deliver fast and flexibly at short notice, even when dealing
with smaller quantities.

Large amount of in-house production – on-site salt bath heat treatment facility

EASY MAINTENANCE
We offer a QuickVChange vane exchangesystem for our BASIC LINE product line.
There is no need to dismantle the air motor
during vane exchange, thus saving valuable production time!

QuickVChange vane exchange system

LONG LIFE-SPAN
A wide product range of stainless steel
motors, the use of DEPRAG high performance vanes as well as a specific surface
coating on our materials, all this ensures
your motor’s long life-span.

Air motor–gear-valve, a system for the paper industry made of stainless steel;sealed stainless steel motors and high performance vanes

6What distinguishes DEPRAG Air Motors from the rest?
FLEXIBILITY
As well as wide-ranging ADVANCED LINE
and BASIC LINE standard programmes,
we offer flexible choice of materials, e.g.
ceramic, or designs tailored to meet yourneeds.

Innovative materials, e.g. ceramic motor; customer specific package solutions

APPLICATION CONSULTANCY
Our application engineers advise you in
selecting the most suitable drive system foryour application. If you would like to test or
replace your existing drive, we are happy
to check it in our innovative performance
testing facility.
Performance testing facility; professional guidance from our engineers

SERVICE AND MAINTENANCE
We will gladly carry out regular maintenance on your air motor. Ask about ourmaintenance offer. Appropriate service andmaintenance kits for our air motors arealso available.

Worldwide service

GREAT VALUE CUSTOMISATION
Our standard programme features a highvariety of different designs.
Planetary gears, spur gears or worm
gears are optionally available for all our
air motors. On the basis of our modular
principle we also provide individually customised pro­ducts at an attractive price/performance ratio.

Individually customised products at an attractive price7

Advantages of Air Motors
Air motors are safe and robust drive systems, which come into play when a high performance and overload safe drive is required.
Always ready for action long after traditional drive technology has stopped spinning!

safe
for use in potentiallyexplosive environments

sealedeven for underwater usage

insensitive to acids

sterilisable
for repeated use inclean-rooms

resistant to cleaning agentsand suitable for the highstandards of the foodprocessing industry

light and compact
only 1/5 of the weight and 1/3of the size of an electricmotor of equivalent power

insensitive to vibrations

insensitive to heatinsensitive to dust

overload safe
can be loaded to standstillwith no damages

reversible
can be set in bothrotational directions

easy to control
smoothly controlled byaltering the pressure or
air quantity (throttling)8Our Product spectrum
Our product lines:

Advantages:

Product spectrum:

Tooth-Gear Motors• speeds up to approx. 100,000 rpm• oil-free• no wear parts• low noise level• suitable for continuous use

Tooth-gear motors are developed
individually to fit your requirements.

Turbines• speeds up to approx. 120,000 rpm• oil-free• no wear parts• optimum power to weight ratio• low air consumption• Turbines with flexible power settings
1.5 kW / 3 kW or 4.5 kW• Turbine production according to
your specific application.

Air Vane Motors• speeds up to approx. 60,000 rpm• compact & light• ATEX conform• overload safe
• robust & powerful• BASIC LINE• ADVANCED LINE
• POWER LINE
• INDIVIDUAL LINE• Grinding, milling & drill motors• Air motors with integrated
holding brake• Gear motors

Speed regulator• universally applicable due to theunlimited parameter setting• large range for speeds
up to 80,000 rpm• high resolutions andhighly accurate control

A speed regulator is well-suited for applications such as an agitator or mixer, wherea constant speed is a prerequisite for an
accurate production.

9

Product spectrum: Tooth-Gear Motors
Our tooth-gear motors provide made-to-measure drive solutions for your individual application needs.
Function of a Gear Motorexhaustforce exerted on flankin turn direction

Gear motors consist of two gear wheels,that run in a housing with minimal play.
One gear-wheel is rigidly interconnectedwith the drift shaft, the other generates thetorque. Two gear-flats are directed withcompressed air into the turn-direction and
one gear-flat against the turn-direction.
The exhaust air is directed into chambers that are formed between the gear-flat andhousing wall - towards the exhaust air
side and rotation is generated.

force exerted on flankagainst turn direction
inlet

Design of a Gear Motor

Seal plate

Tooth wheels

Bearing needleMotorhousing

Gear motors are operated oilfree.

Product spectrum: Turbines
DEPRAG turbine technology – one drive,
3 power levels
Our powerful turbines promise high torquesin every application. Even under load, theintegrated speed controller ensures a constant speed. Our compact turbine drives are
the perfect choice for various applications.
For example, they are suitable as air starters for small and medium-sized combustion
engines and gas turbines. They also provide
a powerful drive in drilling machines, grinding
and milling tools.
With our turbines, we offer energy-efficient,high-speed drives that are suitable for continuous operation and guarantee low air consumption with an optimum power-to-weightratio.

The highlight: the output of our turbine
motors can be flexibly adjusted to 1.5 kW,
3.0 kW or 4.5 kW. Our drives are available
with speeds of 80 - 3,400 revolutions per
minute.

With our turbines, we offer energy efficient,high speed drives that are suitable for continuous operation and guarantee low air
consumption with an optimum power toweight ratio. The turbine is fluid mechanicallydesigned and calculated, constructed andAdvantages of our turbine motors
customised for your specific application. The
Thanks to the adjustable output (1.5kW/ following individual parameters are taken into
3kW/4.5kW), our turbines offer maximum account:
flexibility and achieve nominal speeds of 70- 2880 rpm.
• Mass flow or desired power output• Inlet/outlet pressure• Oil-free operation• Medium (type of gas)
• Optimum power-to-weight ratio• Speed, turn-direction• Low air consumption• Inlet temperature• No wearing parts• Mounting preference• ATEX compliant• Material request• Right rotation or left rotation• Flexible installation position

Design and functionality of a turbine motor
Pneumatic turbines are continuous-flowmachines, which can be executed in singlestage or dual-stage design.
The conversion of the pressure energy into
kinetic energy takes place in the inlet nozzle. On a two-stage turbine, the largest partof the kinetic energy is converted in the 1st
turbine wheel. The air-flow is diverted overthe stationary turbine wheel. The remaining energy is converted in the 2nd turbine
wheel.

guide wheeljet nozzle

Air
flow

2nd rotor disc 1st rotor disc

The turbine does not require any contact
seals. Therefore, the operation of the turbine with non-lubricated compressed-air
is totally free from wear. Continuous-flowmachines optimally utilize the energy of thecompressed air. Therefore, the air requirement of a turbine motor is 1/3rd less whencompared to an pneumatic vane motor.
The power to weight ratio [kg/kW] is only
half.
10

Product spectrum: Air Vane Motors
With our standard, cataloged air vane motors, we can offer completely adapted drive solutions for your application.

BASIC LINE
Our great value for money model for use in
non-critical production environments.
Additional benefit:
You save production time with our
QuickVChange vane exchange system!

Power range:
200 - 1200 W
Your advantages:• ATEX certified• QuickVChange vane exchange system• wide speed range• reversible• robust design

ADVANCED LINE
Our product line of stainless steel motors
stands out from the rest with its comprehensive range of sealed, oil-free operable,
non-corrosive air motors. Particularly suitable for use in the paper industry, food processing industry, for medical tech­nology
and much more…

Power range:
20 - 1200 W
Your advantages:• ATEX certified• non-corrosive• oil-free operable• sealed• reversible• with integrated holding brake• high performance, small size

POWER LINE
Our product line of high performance bracket and flange motors also features wide
versatility. The high starting torque withan unparalleled low performance weight,
the robust and reliable design are all clear
advantages in comparison with an electric
drive.

Power range:
1.6 - 18 kW
Your advantages:• high performance• high starting torque• low performance weight• robust, reliable design• long life-span

INDIVIDUAL LINEThe cost efficient and customized airmotor can be derived from our modular
construction system, be based on a customer-specific product or on a totally customized solution.

Your advantage:• attractive price-performance ratio

11

Air Vane Motors for special applications
Drilling, milling and grinding motors
Drill Motors
Our efficient drill motors with slim design
allow the smallest of drill spacings whenusing multi-spindle units, such as for theconstruction of windows.

Milling Motors
The durable milling motors with a superior
run-out precision, are the first choice forrobotic applications, since they are small insize but powerful at high speeds.

Grinding Motors
The DEPRAG grinding motor program
benefits from decades of experience withthe tried and tested DEPRAG handheld
pneumatic grinders. The robust steel
housing guarantees high accuracy andoperational reliability. Furthermore, thegrinders feature extremely precise collets
for various shaft diameters and offer a highrun-out accuracy.

Power range:
80 - 600 W
Speed range:
150 - 24,000 rpm
Your advantages:• high precision drill chuckwith taper fitting
Power range:
400 W
Speed range:max. 20,000 rpm
Your advantages:• robust and precise bearing• high running precision

Power range:
150 - 1000 W
Speed range:
15,300 - 47,000 rpm
Your advantages:• high precision collet for various
shaft diameters• high running accuracy

Air motors with integrated holding brake
A cost effective total solution:
Benefit by using our standard program of
air-motors that feature an integrated brake-module.

The integrated brake equipment can becontrolled either via a separate control line
or directly via the airmotor exhaust. If pressure drops in the line the brake is automatically activated.

DEPRAG air motors with integrated holding brake are suitable for use in any application area due to their optimal size anddesign in which safety plays an importantrole.

The DEPRAG ADVANCED LINE stainless steel motors and the 1.6 kW, 3.2 kW,
5.0 kW and 6.0 kW POWER LINE areavailable with integrated holding brake.

NEW:
The world's first ATEX conform complete
system, consisting ofThe brake is controlled via a separate control line (p > 5 bar) with integrated safetyvalve.

air motor, holding brake andplanetary gear
can be found as a standard product in the
ADVANCED LINE air motor program for 20 W
- 1.6 kW stainless steel airmotors.

12Air Vane Motors for special applications
Gear Motors
Due to high speeds, gears which are suit­ed to a particular torque / speed are often
required.
The DEPRAG product spectrum consistsof numerous gear motors with precision
planetary gears for high torque for verysmall sizes, spur gears or worm gears totransfer high torque at low speeds.

Planetary Gears
Advantage Planetary Gear:• compact design• high degree of re-usability• any installation position• gear ratio i = 5-308
Advantage Spur Gear:• cost-effective• any ratio: i = 7-238

Spur Gears

Advantage Worm Gear:• cost-effective• compact design• high gear ratio of 14-80
available in one step• self-retention

Worm Gears

Speed regulator – Innovative system solution to equalize speed-fluctuations
A speed regulator is well-suited for applications such as an agitator or mixer, wherea constant speed is a prerequisite for an
accurate production.
The DEPRAG speed regulator consistsof a non-contacting speed sensor that is
directly integrated into the air-motor between the actual vane-motor and the gearing.
The sensor acquires the current speed andtransfers the digital signal to the regulator.
If there is a variation, a special valve isactuated, which regulates the airflow for
the motor.
The control module is integrated into a
DIN-rail-housing, which allows the installation into a customer’s control box. The
operator friendly LC-display is used for thesimple and uncomplicated selection of therequired speed value.
Your advantages:
Universally applicable due to theunlimited parameter settingThis new speed regulator can be used withdifferent applications. Some processes

focus more on the regulator speed whileother processes require a high accuracyof the regulator. DEPRAG speed regulator
can be individually programmed for either
application and is therefore universally
applicable.
Large range - speeds up to 80,000 rpm
The complete product range of our airmotors can be served by this speed regulator.
High resolutions and highly accurate
control
Even an air-motor with a very low speed
can be reliably regulated. The speed isevaluated from a full rotation to a 1/32 ofa rotation and regulated to correspondwith the nominal value. Even air motors
with a high speed are easily controlled by
the proportional regulator-valve becauseof the regulator’s high resolution and accuracy. The output signal for the control ofthe valve is 0-10V, the resolution of theregulator voltage is therefore 2.5 mV.

13

Function of the DEPRAG Air Vane Motors
All vane motors essentially consist of therotor, which circulates in an eccentricallyoffset perforation of the rotor cylinder.
Because of this eccentrically offset perforation, the vanes form working-chambers,
the volume of which increases in the turn
direction. Because the expansion of thecompressed supply air, the pressure energy
is converted into kinetic energy, and therefore, results into the rotation of the rotor.

R

Right Rotation

L

L

Left Rotation

R

Reversible

For motors with one turn direction, an increased turn angle for the expansion of the
air is available. Therefore, these motors
reach a somewhat higher efficiency.
The total efficiency-grade is essentiallydefined by the leak-loss on the front end of
the motor. Highest production tolerances(≤ 0.01 mm) are essential for the uniqueperformance density of the DEPRAG vane
motor.

Depending on application requirement, therotor contains 3 to 6 vanes. A higher vane
quantity results in a greater start safety athigher friction losses. The tangential arrayof the vanes, provides a larger vane height
and with it higher motor endurance. Virtually all DEPRAG air motors include a specialized surface treatment of the rotor cylinder, which increases the vane life span.
In practice, vane motors have shown tokeep a relatively constant orbital speed,which is, according to motor design, between 25 and 30 m/sec. The idle speed ofan air motor essentially depends on the
motor-diameter.

Vane

SpringVane motor with automatic start

14

Starting conditions
During the operation of an air motor, thevanes are pressed against the wall of therotor cylinder by the centrifugal force,
which seals the working chambers against
each other. If there are special requests inregard to the start-torque, suitable measures must be met to guarantee an automatic start.
For example: – spring-loaded vanes– pin-guided vanes– thrust-rings– vacuum induction, etc.
With the above options, it is possible toachieve a start-torque, which is approximately 1.5fold of the nominal torque.

Air quality and oil-free operation
Oil-free operation
All DEPRAG ADVANCED LINE stainlesssteel motors from series 67 are suitablefor oil-free operation. They fulfil the special requirements of the food processing
industry and are equally suitable for application in clean-rooms.
It must be noted that oil-free operation
can reduce the output of the air motor by
10-20 % depending on design.

In regard to air quality according to ISO 8573-1, we recommend:Cl.

Dry Air
Lubricated Air

3
4

Residue of
Oil Content

Residue of Dust

Residue of Water

particlepressuremg/
size mg/
dew-point
m3 oz./cu.ft.
mm m3 oz./cu.ft.
°C-6
1 1.03 · 10 0.005 5 5.14 · 10-6
-20
5 5.14 · 10-6 0.015 8 1.03 · 10-6
+3

g/
m3
0.88
5.953

oz./cu.ft.
0.90 · 10-3
6 · 10-3

Operation with lubricated air
Lubricated operation always improves a
motors life span and operational behavior.
For a correct air preparation, dryers andmaintenance-units, existing of filter andoiler, are available.

ATEX KENNZEICHNUNGA=B=II 2G Ex h IIC T6 Gb X

C=

II 2D Ex h IIIC T80 °C Db X
II 2G Ex h IIC T5 Gb X

D=

II 2D Ex h IIIC T95 °C Db X

Explosion prevention
With the guideline DIN EN ISO 80079-36:2016
the qualification of air motors for the use in
EX-environments must be proven.
The type examination certificate from an
independent test facility guarantees the user
safe use of our air motors in the non-mining
sector of device category 2– Gases/vapours G, suitable for zone 1 and 2– Dusts D, suitable for zone 21 and 22.

For substances which fall under explosion
group IIC, the permissible surface temperatures stated in the catalogue apply.
The max. surface temperature for explosion
category IIIC (conductive, flammable dust)
can be found in the second line of the ATEX
classification.
The markings can be found in the corresponding product catalog.

The world's first ATEX conform complete
system, consisting of
air motor, holding brake andplanetary gear
can be found as a standard product in the
ADVANCED LINE air motor program for
20 W - 1.6 kW stainless steel airmotors.
Details can be found on page 12.

15

II 2G Ex h IIC T4 Gb X
II 2D Ex h IIIC T130 °C Db X
II 2G Ex h IIC T3 Gb X
II 2D Ex h IIIC T195 °C Db X

Comparison of drive principles+

HYDRAULIC MOTOR

AIR MOTORELECTRIC MOTOR• may be loaded until full standstill• overload safe
• operationally safe
(dust, gas, water)• weight• high power density• output-to-size ratio• may be loaded until full standstill• overload safe
• torque increase at mounting load
• low installation cost
• maintenance friendly• explosion proof• operationally safe (dust, gas, water)• low weight and small size
• high power density• can be sterilized• cost• total used energy• noise level• maintenance intervals• adjustability• danger of oil leakage• total used energy• noise level• maintenance intervals• risk of failure at overload• safety risk of any electrical installation• high weight• large sizepack necessary– •• hydraulichigh installation costs

Comparison
Air Motor / Electric Motor
Frequently, the unfavorable total energy
use is seen as a disadvantage of the air
motor. That the air motor has neverthelessasserted itself in the entire drive technology
as an essential alternative, emphasizes its
numerous advantages. When comparedwith the total cost estimate of the machine,the energy consumption plays no crucialrole, especially when small drives with low
duty cycles are used.
Design size
The main advantage of the air motor is its
high performance density, which is only
about 1/5th of the mass or 1/3rd of thesize of an electric motor of comparable
performance. This is particularly importantwith all hand-held machines, but also withrobotic-systems or CNC-machines, where
the drive has to be indexed.

Power characteristics

SafetyThe power output performance of the
air motor is virtually constant over broad
speed ranges. It can also be operated ina wide field of alternating loads. The power
output can be easily adjusted by changing
the operating-pressure, and the speed isperpetually variable, by the reduction of air
volume.

Air is an unproblematic energy carrier.
There are no dangers from electricity or
temperature increases e.g. in potentiallyexplosive environments.

Load capacity
The air motor can easily be loaded to a fullstandstill; it even tolerates a negative turn
direction if the load is increased. The motor
always reaches its full power output andthere will be no damage to the motor! The
air motor starts again immediately, once
the load is removed and this consecutively, even when motor operates withouta pause.
Temperature behaviour
Expanding air cools the motor when theload is increased. Only when idling, a risein temperature may occur. The motor istherefore temperature insensitive and overheating through over load is practically
impossible.
16

MaintenanceAir operated drives are extremely robust.
The internal overpressure prevents thepenetration of dust or dirt. Only the low
cost vanes need to be exchanged as wear
parts. Necessary repairs are simple andcan be done easily and safely by a trained
maintenance person. No electricity specialist is necessary.
Further details and valuable hints can betaken from our catalog D0090E „Preventive maintenance and repair of air-operated
tools.”

Characteristic curve of the Air Vane Motor
Performance

Stalltorque

200

100

180

90

Starting
torque

80

140

70

M

120

NominaltorqueQ

P

160

Nominal
power

60

100

50

80

40

60

30

40

20

20

10

20

30

40

50

Nominal
speed

10

60

70

80

90

Speed (n) %

100

Speed
idlingA parabolic performance curve results fromthe linear torque process, with the maximum output at nominal speed. This output maximum is identified according to
the nominal speed, as the nominal power
output. Each operating point below thenominal power output is reached with
2 speeds, which lie symmetrically to the
output maximum. Therefore, the air motor
cannot be selected for performance alone,
but in the first place according to the ne—cessary torque, as well as the corresponding speed.

Power (P) %Air consumption (Q) %Torque (M) %Characteristics of the air vane motor

TorqueSpeed

Air consumption

The torque of unadjusted vane motors
increases, at constant operating pressure, almost linearly with decreasing speed.
The air motor can easily be loaded to a fullstandstill, where it reaches the so-calledstationary or stall torque. The theoreticalstall torque corresponds approximately to
double the nominal torque, reduced by thestandstill loss, in practice to about 1.9foldof the nominal torque.

With vane motors, speeds of up to 80,000 The air and with it the energy consump­
rpm can be reached.
tion, is determined by the leak loss and theoutput from chamber volume, chamber
The idle speed of an air motor can be set in number and speed. The air consumption
a wide speed range of approx. 15 - 100 % increases with the speed and reaches
its maximum with the unloaded speed.
Vane motors usually cite a specific air
con­sumption per kilowatt of 1.4 m3/min at
smaller motors, up to 1 m3/min at bigger
motors.

The so-called startup or starting torqueagainst the load, is lower than the stall
torque. It depends on the vane array at thestart-up time. The fluctuation amounts toapproximately 100 to 150 % of the nominal
torque.

17

Infinite variable regulation of the air pressure or air volume

Stalltorque

200

100

180

Nominal
power

90

Q

P

160

Starting
torqueYour air motor is very flexible: The speed can be variably adjusted to fit your requirement. The speed change can be achievedby varying the air pressure, or by changing the air volume or ascommonly used by a combined regulation of air pressure andair volume.

Power (P) %Air consumption (Q) %Torque (M) %Speed change through load change:

80

140

The speed of the air motor automatically adapts to the loadchanges: This means that at no load, the air motor operates at
no-load speed. If there is increased load (low torque) the nominal
speed is close to the no-load speed.
With increased load (increased torque), the speed decreases.

70

M
120

60

Nominal100
torque

50

80

40

60

30

40

20

20

10

Energy Efficiency:
An pneumatic motor achieves its maximum power when it
is operating as close as possible to its rated speed (50% of
the rated idle speed). The energy balance is best in this area,
because the compressed air is used efficiently.
Theoretical power curves are available for all DEPRAG pneumatic motors. Please ask us for additional information.

Speed (n) %
20

30

40

50

60

70

80

90

100

Speed
idlingNominalspeed

10Regulating the speed by air volume:

Torque (M) %100

Through throttling the exhaust air, a speed reduction of thepneumatic motor is achieved without any considerable loss of
performance or torque. On the other hand, if you would like toalso reduce the power output or the torque in addition to the
speed, then an air-inflow throttling is recommended.

Exhaust Thr ottle
80

Supply Air Thr ottle

60

Regulating the speed by air pressure:40

The operating data of the DEPRAG air motor is based on an
operating air pressure of 6 bar. By adjusting the pressure in therange of 4 to 6.3 bars you can manipulate the speed, power,
torque and air consumption of your pneumatic motor without
problems. The following correctional factors are applicable toachieve the desired adaptation:

20

20

40

60

80

100

Speed (n) %Torque / speed reaction with air regulation
Pressure (p)Power (P)

Speed (n)Torque (M)Air consumpt. (Q)bar/PSI

%

%

%

%

130

7 / 99

121

103

117

117

120

6 / 85

100

100

100

100

5 / 71

77

95

83

83

4 / 57

55

87

67

67

3 / 42

37

74

50

50

Power
Speed
TorqueAir consumption

(P) %
(n) %
(M) %
(Q) %

110

Nominal power
Nominal speed
Nominal torqueAir consumption

100

n

90
80

Nominal pressure 6 bar

Q

70

M

60
50

P
40
30
20
10

Pressur e (p) bar
3

4

5

6

7

Pressur e (p)bar / PSI

Power (P)%

Speed (n)%Torque (M)%Air consumpt. (Q)%7 / 996 / 855 / 714 / 57

121
100
77
55

103
100
95
87

117
100
83
67

117
100
83
67

18

Installing your Air Vane Motor
Air Connections
Inlet for right rotation

If you connect your air motor, do not close the second
inlet-connection (reverse port) and the exhaust port.
This allows your motor to start unimpeded.

Inlet for left rotation

Exhaust port

Turn direction: view from air inlet

Connection control diagrams for the control of our
air motors

3
12

1

4

2

3 1

4

2

3 1

1

3

12

To control an air motor in one direction a simple 2/2-way valve isall that is needed.
Air motors that are reversible (i.e. into two turn-directions), canalso be controlled by a simple flow-valve, if the motor contains
an integrated, manual reverse lever (for example: POWER LINE
high-performance motors).

12

3
1

2

4

2

4

4
2

4

3

3

1) Maintenance uni t
2(filter with water separator, pr essur eregulating valve
1) Maintenanceuni tand oiler)2e2) (filter
Silencerwith water separator, pr essur
3) regulating
5/3-way valve
valve and oiler)
1)
Maintenanceunit4) Silencer
Motor2)(filter with water separator, pr essur e3) 5/3-way valve
regulating valve and oiler)
4) Motor2) Silencer3) 5/3-way valve
24) Motor

2
2

1

5

2
4

1

3

1

2

2

3

1

1

4

3

2
5

1

5

Otherwise, a 5/3-way valve or alternatively two 3/2-way valves
are needed, so that the unused inlet can be exhausted.
When using any valves, make sure to pay attention to the minimum required hose-ID and that the valve allows for the a sufficient flow-rate as shown for each motor in our product catalog.

23 11) Maintenance uni t
Air motor
2 right-/left-rotation2(filter with water separator, pr essur eregulating
valve
and
oiler)Air motor
1) Maintenance uni t2) (filter
Silencerright-/left-rotation
with water separator, pr essur e3) regulating
2/2-way valve
valve and oiler)
2
2
4)
Motor
2) Silencer
1) Maintenance uni t
Air motor
3) 2/2-way
valve(filter with water separator, pr essur eright-/left-rotation
4) Motor
If theair
motorvalve
is usedin one turn-direction only, then it should be
regulating
and oiler)2) Silencer
operated
with a 2/2-way valve3) 2/2-way valve
324) Motor

4
Air motor
reversible

Air motor
reversible2
2

Air motor
reversible

1

2

3

If the motor needs to be used with reverse, then it should be operated
2
with a 5/3-way valve
4

3
1

1

12 2

3

1

2

12 2

1

1

4
2

1

2
1 3
2

1) Maintenance uni t(filter with water separator, pr essur
2 eregulating valve
1) Maintenanceuni tand oiler)2) (filter
Silencer2ewith water separator, pr essur
uniandt oiler)
3)1)regulating
2Maintenancex 3 /2 -wayvalve
valves(filterwithwater
separator,
pr
essur
e
4) Silencer
Motor2)
regulating valve and oiler)
3) 2 x 3 /2 -way valves
2) Silencer4) Motor3
3) 2 x /2 -way valves
4) Motor

3

2

1

3

12
2

4

Air motor
reversible
Air motor
reversible
Air motor
reversible

2
2

The air motor can also be used with two 3/2-way valves if operated withreverse19

Selecting an Air Motor for your application
Are you looking for a suitable motor foryour construction?
The following guide will help you to avoid
annoying mistakes which could drive up
running costs later.
This is the correct procedure for selecting
your drive:

STEP 1:
WHICH DRIVE PRINCIPLE ISSUITABLE FOR YOURAPPLICATION?
Air motors are available in various designs.
The deciding factor in your choice is theapplication and the intended operating lifespan.
The air vane motor is suitable for regular
operating cycles.
However tooth-gear motors or turbines
are more suitable for continuous operation(24 hour, non-stop) of the planned machine.

STEP 2:

Underwater usage

WHICH MOTOR MATERIAL ISSUITABLE FOR YOURAPPLICATION?

When using an air-motor under water, its
performance depends on how you operate
your air motor and at what depth.
If the motor is started outside of the waterand subsequently submerged in water up
The material and design of the motor is to a depth of 20-meters, then the DEPRAG
decided according to your individual appli- ADVANCED LINE air motors made from
cation. DEPRAG offers much more than stainless steel can be used.
the catalogue standards with drive solutions adapted to your application, so that If the air motor starts below the water suryour motor provides reliable service for you face, then our ADVANCED LINE air motors
for as long as possible.
can be used up to a depth of 5-meters.
If you have more difficult requests or would
like to use the air motor in saltwater, then,Normal production operation
further additional modifications have to
be made to the housing material, to seals
In dry environments and for standard ope- and to the coating of interior parts - pleaserating procedures, an air motor made from contact us with more details.
cast-iron is the right solution. Here, we
can offer the wide product range of the
DEPRAG BASIC LINE air motors. For inte- Medical technology
gration with robots or into machines, we Pharmaceutical industry
offer a multitude of grinding-, milling-, anddrill-motors, which excel through their low Air motors in the medical and pharmceutiweight and compact design.
cal industries work in sterile conditions.
Special materials ensure a long life-span
despite frequent sterilisation of the comPaper industry
plete air motor.

For use in the paper industry a stainSpeeds:
less steel design is required. DEPRAG Potentially explosive areas
Turbines and tooth-gear motors rotate in ADVANCED LINE motors satisfy the highthe upper speed range (up to 140,000 rpm). demands of this field.
In potentially explosive environments air
Air vane motors are available for very small
motors are the first choice due to their
speeds e. g. 16 rpm.
design and functionality. The expanding
Food processing industry
compressed air cools the motor as it
works. However extra combination with
Oil-free operation
Air motors used in the food industry must gears and brakes could increase risks.
is an option for all three basic principles. be resistant to cleaning agents and water
Therefore for this application DEPRAG
It is available for all ADVANCED LINE air vapor. The DEPRAG ADVANCED LINE airoffers the world’s first ATEX conform commotors of the series 67 taking into consi- motors are fully sealed and all seals areplete system of air motor, brake equipment
deration the possible reduction of power made from resistant materials.
and gears.
10 - 20 %.
Chemical industry

Have you found your application?

Air motors for the use in the chemical We are happy to advise you in yourindustry have to be resistant to aggressive individual application needs.
chemicals. Please tell us the chemicals
that the air motor comes in contact withand we select the suitable material to
manufacture your air motor. Especially inthis industry, an air motor has to be explosion proof. Your DEPRAG air motor made Example:
from stainless steel fulfills the ATEX norm An air motor made of glass ceramic –and is additionally fully sealed.
a non-ferritic drive system for use
in magnet resonance therapy.

20

Selecting an Air Motor for your application
STEP 3:
HOW DO YOU CALCULATE THE
MOTOR POWER TAKING THE
APPLICATION CONDITIONSINTO CONSIDERATION?
Stall
torque100180

Starting
torque

P

80

140

70

M
60

Nominal100
torque

50

80

40

60

30

40

20

20

10

Speed (n) %(2) Optimal working range of the
Air Motor

10

20

30

40

50

60

Nominalspeed

Air motors function in a very broad working
range which can be decisively influenced
by the amount of supplied air and the airpressure.
Next determine the working position foryour motor:
Which nominal torque and which speed(when loaded) do you want to reach?

Q

120

View from air inlet in the direction of motor
shaft.

Nominal
power

90

160

(1) Rotational direction
Determine the required rotational
direction:• clockwise• anti-clockwise• reversible

200

70

80

90

100

Speed
idling

The correct calculation of your required
drive is influenced by the required torque,the optimal working range of your air
motor, the necessary motor power andpossibly any application conditions which
affect performance.

Power (P) %Air consumption (Q) %Torque (M) %= optimal working range of the air motor(3) Calculating the motor power(4) Allowing for performance
influencing application
conditions

The most economical operation of the air
motor (least wear, least air consumption, Next calculate the basic performance dataetc.) is reached by running close to nomi- of your motor, which will be adjusted inconnection with your framework condi- All performance specifications of DEPRAG
nal speed.
tions (operating pressure available, ope- air motors are based on an operating pressure of 6 bar. Operating pressure means
By torque of M = 0, the maximum speed ning cross-section, oil-free operation).
the flow pressure directly at the air motor.
(idle speed) reached.
Shortly before standstill (n  , the air
motor reaches its maximum torque(Mmax ≈ 2 x Mn).

P=

Mxn
9550

At nominal speed (nn), i. e. in the middle of P = Power output in kW
the speed range, the air motor reaches its M = Nominal torque in Nm
n = Nominal speed in rpm
maximum power output (Pmax).
Power [HP]
= P [kW ] x 1.34
Torque [in.lbs] = M [Nm] x 8.85

21

The catalogue specified inner opening
cross-section of the supply hose (andall connection pieces and valves) as wellas the length of the supply hose (max.
3 metres) of each motor influences the per­­f­ormance calculation.
The catalogue specifications are also
based on lubricated operation. Oil-free
operation results in reduced performance(see subsection “c”).

Selecting an Air Motor for your application
Power
Speed
TorqueAir consumption

If your application conditions differ from thisbasic data then the performance data ofyour motor should be corrected as follows:

(P) %
(n) %
(M) %
(Q) %

130

a) Allowing for a different
operating pressure

120
110

Nominal power
Nominal speed
Nominal torqueAir consumption

100

n

90

To adapt the differences in operating pressure you can either use the correctional
diagram on the right or the correctional
table.

80

Nominal pressure 6 bar

Q

70

M

60
50

P
40
30
20
10

Pressur e (p) bar
3

4

5

6

7

Pressur e (p)bar / PSI

Power (P)%

Speed (n)%Torque (M)%Air consumpt. (Q)%7 / 996 / 855 / 714 / 573 / 42

121
100
77
55
37

103
100
95
87
74

117
100
83
67
50

117
100
83
67
50

Influences of the operating pressure

Torque (M) %b) Allowing for opening
cross-section

100

Exhaust Thr ottle

Every size reduction of the opening crosssection, whether of the supply hose itself
or connection pieces, affects the amountof supplied air. On a standard motor you
can adapt the amount of air to fit yourneeds by throttling if required.

80

Supply Air Thr ottle

60

For all our air motors there is a characteristic line available. Just ask us to provide
one!

40

20

20

40

60

80

100

Speed (n) %Influence of the air quantity

22

By throttling you reduce the speed of yourmotor and simultaneously, the required
torque: that means that you reduce themotor performance. By exhaust thrott­ling, on the other hand, you can set the
speed of the motor without great loss ofthe torque.

Selecting an Air Motor for your applicationc) Allowing foroil-free operation
The optimal life-span and performance ofan air motor is reached by 1-2 drops of oil
per 1m3 air consumption.

Oil volume in mm3
to 1 m3 /35.3 cfm air consumption

50

The air consumption data for each motor
can be taken from the product catalog.
10

For oil-free operation an additional perfor­
mance loss of 10 - 20 % must be calculated.
1

Nominal power %
50

60

70

Are you having trouble determining
your performance data?
Contact our application consultants – they
will be glad to help you!

Using our modern test facility we can determine performance parameters, speed,
torque, operating pressure, air consumption and air humidity in

Would you like to calculate the performance data of your existing drive?
We offer a comprehensive testing service
to determine the performance data ofyour existing drives (air motors, hydraulicor electric drives, grinding machines, drill
machines, etc.).

Speed range of:
0 - 12,000 rpm
andtorque range of:
0 - 500 Nm
with accuracy of 0.1 % of the nominal
torque.

80

90

100

STEP 4:
HOW DO YOU INTEGRATE THE
AIR MOTOR INTO YOURCOMPLETE SYSTEM?
Once you have chosen your air motor you (2) Integrated gear solution
can add extra components which areavailable from DEPRAG’s standard proA complete solution is often better value forgramme.
money than searching for a gear solution
yourself. DEPRAG offers a comprehensive
range of motors with integrated planetary
gears, worm gears or spur gears.
(1) Integrated brake equipment
A worm gear is recommended when yourFor example, if a brake needs to hold the system’s gears need to be selflocking. A
position of a barrel during a tipping pro- planetary gear allows a changeable instalcess, then a DEPRAG standard system lation position for smaller sizes.
can accommodate this requirement.
Even if you can not find the right model inour catalogue, we have lots of great value
special solutions available.

23(3) Fixture and connection size
We offer numerous individual fixture op­tions as well as those in our catalogue, sothat our air motor fits perfectly into yourmachine.
Tell us your requirements, we can implement them for you at low-cost.
(4) Technical examination
How does the power of your planned system affect the motor’s drive spindle?
The maximum allowable axial and radialloads can be found in our catalogs.

Selecting an Air Motor for your application
STEP 5:

STEP 6:HOW CAN YOU ENSURE LONG
LIFE-SPAN AND HIGHPERFORMANCE OF YOUR MOTOR?

HOW CAN YOU DETERMINE THE
PURCHASING AND RUNNING
COSTS?

Air motors are extremely high performance The purchase price is the main factor tomachines and therefore have a long-life- consider when buying a new drive system.
span and are robust.
However, the follow-up costs must not be
Adhering to the following framework con- forgotten.
ditions ensures the highest possible lifespan and best performance of a motor:
The operating costs for maintenance andservice should also be taken into account• keep to the recommended air quality when deciding to buy an air motor.
(dry supply air, free of particles)
The cost of running the motor depends• optimum life-span and best performance on air consumption. The correct choice ofis achieved with 1-2 drops of oil per 1 m3 motor sets you on the right path for low
air consumption
running costs. The closer the motor is run­ning to its nominal speed, (50 % of idle
• keep to the recommended maintenance speed) i.e. the maximum performance ofintervals (for oil-free operation please the motor is reached, the more efficiently
allow for shorter periods between main- the air will be used.
tenance intervals)

Time is money – how easy is it tomaintain your motor?
The DEPRAG BASIC LINE motor is parti­
cularly service friendly:
Due to our QuickVChange vane exchangesys­tem the air motor’s vanes can be exchanged directly on the machine with justa few movements. Lengthy periods ofstandstill because of maintenance work on
your machine are eliminated.
QuickVChange
Vane Exchange System• sufficient opening cross-section of the Replacement parts andair supply hose and the connection fit- maintenance kitstings
Already when planning and selecting new• maximum length of the air hose 3 metres equipment the question of fast availability of replacement parts and their price• operate the motor within its optimal wor- arises.
king range, i.e. near to nominal speed DEPRAG air motors stand out from therest because of their extremely competitive
How frequently an air motor should be replacement parts.
maintained is dependent on many factors.
The application environment and conditions play an important role, also the size ofgears or torque range. Additionally the duty
cycle of the air motor must be considered.

Maintenance and repair service
DEPRAG additionally provides a package
offer for maintenance and repairs whichmakes your follow-up costs easily calculable.
Here is a useful tip to remember when yourpneumatic motor will not be used for a longtime: add a drop of oil to the air inlet andlet the motor run for 5-10 seconds. Thenthe motor is well prepared for standstillor storage and will run again easily whenrestarted.

24

Exchange the vanes directly on
the machine – fast and convenientDo you need support in selecting the right drive system?
Tell us your operational conditions and our application consultants will be happy to help:

Application:

In what kind of environment
will the motor be installed?

Application conditions:

ATEX requirement / explosion safety?

■ yes

■ no

food industry conformity?

■ yes

■ no

sterilisable?

■ yes

■ no

acid resistant?

■ yes

■ no

steam resistant?

■ yes

■ no

constant operation (24 hrs, non-stop)

■ yes

■ no

motor loaded to stall?

■ yes

■ no

self-locking?

■ yes

■ no

if yes, which safety class:duty cycle in hrs/day:days/year:
cycle time (s):Required turn direction:■ left■ right■ reversible(view from air inlet)
Motor performance:

Performance influencing
application conditions:power:

W

nominal torque:Nmnominal speed:rpm

operating pressure (at motor inlet):bar

operation with lubricated air possible?

■ yessmallest opening cross-section ofconnection pieces and hoses?
External motor design:■ standard steel■ non-corrosive■ plastics■ ceramics

mm■ aluminium

other:
Drive spindle design:

drive shaft requirements:(e. g. keyed shafts, square end, hexagonal, collet, drill chuck taper, etc.)
mounting dimensions:Motor
fixture design:

mounting requirements: (bracket, flange, etc.)

Additional components:■ holding brakerequired dimensions:■ operational brakegear box:
Price range:
Annual requirement:

25

■ no

Do you need support in selecting a turbine system for your application?

Do you need support in selecting a turbine system for your application?
Tell us your operational conditions and our application engineers will be happy to support you:
Tell us your operational conditions and our application engineers will be happy to support you:

Application (e. g. air tools,
recovered energy
application):

Medium (Type of gas, fluid):

Technical data:

Entrance pressure:Output pressure:
Entrance temperature:
Mass flow:
Power:
Speed:

M leftRequired turn dirction:

M right(view from air inlet)

Application conditions:

Constant application (24 hrs, non-stop) M yes

M no

Duty cycle in hrs/day:days/year:
cycle time (s):Required material:

M standard steel M non-corrosive
M plastics
M ceramics

M aluminium

other:
Drive spindle design:

Fixture requirements:(keyed shaft, square end, hexagonal shaft, collet, drill chuck taper, etc.)

Required dimensions:

Motor fixture design:

Fixture requirements (bracket, flange, etc.):
Required dimensions:Price expectations:
Annual requirement:26

Do you require support for the needed layout of a turbine generator that lets you recover energy?

Please give us details of your application and our specialists will recommend a suitable product:

Application / Processdescription:* Medium (type of gas, fluid):* Inlet pressure (absolute)* Outlet pressure (absolute)* Inlet temperature oroutlet temperature* Mass flow or

required electrical power
Operating conditions:
Duty cycle in hours per year
Demand:Annual usage

Costing / Budget
Personal data:* Name* Company
StreetZIP / City

* Country
Phone* Email
Web page / URL* mandatory field

27

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