10
Stainless Steel Air Motors
P1V-S
The noise from an air motor consists of both mechanical noise and a
pulsating noise from the air flowing out of the outlet. The installation
of the motor has a considerable effect on mechanical noise. It should
be installed so that no mechanical resonance effects occur. The
outlet air creates a noise level which can amount to 108 dB(A) if the
air is allowed to exhaust freely into the atmosphere. To reduce noise
levels, various types of outlet silencer are used. The most common
type screws directly into the outlet port of the motor. A wide range of
silencers are available. Many are made of sintered brass or sintered
plastic. Since the motor function causes the exhaust air to pulsate, it
is a good idea to allow the air to exhaust into some kind of chamber
first, which reduces the pulsations before they reach the silencer. The
best silencing method is to connect a soft hose to a central silencer
allowing the speed of the air to reduce as much as possible.
NOTE!
Remember that if a silencer is too small or is blocked, back
pressure is generated on the outlet side of the motor, which in turn
reduces the motor power.
Sound levels
Sound levels are measured at free speed with the measuring
instrument positioned 1 m away from the air motor, see the table below
Air
Free outlet With outlet
Exhaust air removed
motor
silencer
with pipes to
another room
dB (A)
dB (A)
dB (A)
P1V-S00
98
-
74
P1V-S008
95
-
71
P1V-S01
99
9
70
P1V-S00
100
88
71
P1V-S030
103
91
70
P1V-S060
103
94
76
P1V-S10
108
95
87
Drilling,
With integrated
Exhaust air removed
milling
outlet silencer
with pipes to
and grinding
another room
motor
dB (A)
dB (A)
P1V-S008
85
71
P1V-S009
7
-
P1V-S017
74
70
P1V-S05
76
71
P1V-S040
77
70
Outlet silencer
Compressed air quality
Oil and oil mist are avoided whenever possible to ensure a
clean work environment. In addition, purchasing, installation
and maintenance of oil mist equipment can be expensive. All
users in all industries now try to avoid using components which
have to be lubricated.
The P1V-S motor is equipped with vanes for intermittent
lubrication free operation as standard, which is the most
common application of air motors. The motor is also available
with optional hard vanes for continuous lubrication-free opera-
tion (option “C”).
The P1V-S motor is equipped as standard with food grade
grease in the planetary gearbox. An oil which is approved by
the food industry is also available if supplementary lubrication
is required.
Working pressure
Max 7 bar (max 6 bar
in explosive atmospheres )
Working temperature
-30 °C to +100 °C
Ambient temperature
-0 °C to +40 °C
in explosive atmospheres
Medium
40 µm filtered, oil mist or
dry unlubricated compressed air
Dry unlubricated compressed air
If unlubricated compressed air is used, the compressed air should
comply with the purity standards below in order to guarantee the
longest possible overall service life. If the unlubricated compressed
air has a high water content, condensation forms inside the motor,
causing corrosion in all internal components. A ballbearing can be
destroyed in a remarkably short time if it comes into contact with a
single water droplet.
For indoor use, we recommend ISO8573-1 purity class 3.4.1. To
achieve this, compressors must be fitted with aftercoolers, oil filters,
refrigerant air dryers and air filters.
For indoor/outdoor use, we recommend ISO8573-1 purity class
1..1. To achieve this, compressors must be fitted with aftercoolers, oil
filters, adsorption dryers and dust filters.
Oil mist
If oil mist is used (approx. 1 drop of oil per m³ of compressed air), the
oil not only acts as a lubricant but also protects against corrosion. This
means that compressed air with a certain water content may be used
without causing corrosion problems inside the motor.
ISO8573-1 purity class 3.-.5 may be used without difficulty.
The following oils are recommended for use in the foodstuffs industry:
Shell Cassida Fluid HF 3 or Klüberoil 4 UH 1-3
ISO 8573-1 purity classes
Quality
Contaminants
Water
Oil
class
particle
max. con-
max. pressure max. con-
size
centration
dew point
centration
(µm)
(mg/m³)
(°C)
(mg/m³)
1
0,1
0,1
-70
0,01
2
1
1
-40
0,1
3
5
5
-0
1,0
4
15
8
+3
5,0
5
40
10
+7
5
6
-
-
+10
-
For example: compressed air to purity class 3.4.3
This means a 5 µm filter (standard filter), dew point +3 ºC (refrigerant
cooled) and an oil concentration of 1,0 mg oil/m³ (as supplied by a
standard compressor with a standard filter).
Silencing
Central silencer
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