4
EN
APPROPRIATE USE
Sound absorbers serve for noise reduction in pneumatic
equipment or pneumatic components, cylinders, valves etc..
After work is performed in a closed system, large quantities
of air are blown off into the atmosphere. Rapid venting and
release to atmospheric pressure with simultaneous sound si-
lencing is achieved by the optimal arrangement of the felt
disks and perforated plates (throttle and absorption principle).
Type 391.1xx:
Features: High blow-off capacity, short ex-
haust time and strong silencing effect. This multi-chamber
muffler is designed for noise reduction of continuous volume
flows.
Type 391.2xx:
Features: High blow-off capacity, short ex-
haust time. This safety muffler is designed for effective noise
reduction of temporarily occurring flow peaks, such as when
the pressure in vessels releases. It has flexibly mounted baffles
and filters. The inlet damper is decoupled.
This device must only be used for the purpose mentio-
ned above, for which it has been specifically developed.
Any use not in line with the intended purpose is consi-
dered as improper. The manufacturer / supplier does
not accept any responsibility for improper use! The risk
is solely borne by the user.
SAFETY INSTRUCTIONS
The operator/user should become familiar with the functio-
ning, installing and using the device.
Never allow untrained or unauthorized persons to operate
the tool. Children may never operate this tool. Juveniles
and persons with limited mental and physical abilities are
only allowed to use this tool after instruction and only under
supervision.
Respect the valid laws and regulations of health and oc-
cupational safety as well as other hazard informations for
your own security and the one of other people. Pay atten-
tion to the manufacturer`s informations concerning opera-
tion and security.
Check all connections for a good fit, tightness and proper
functioning.
Make sure there are no visible damages on the tool. Do
not use the tool with a malfunction or when it has been da-
maged.
Pay attention to the max. operating pressure, it must never
be exeeded.
Avoid shocks of the sound absorber.
Avoid blockage of the felt disks by oil or particles, since this
can lead to increased back pressure and thus to overloa-
ding of the flange.
Physical hazard!
The tool must not be alienated or modified.
Installation and safety instruction:
It is possible to exhaust in a harmless direction by the axial air
outlet.
HAZARD WARNINGS
This product and working with compressed air can be
dangerous if the safety guidelines are not respected.
Wrong operating and disregard of safety guidelines can
result in grievous bodily harm and property damages.
INSTALLATION
The damper can be mounted in any position. Connection
must be axial.
TECHNICAL DATA
Type 391.1xx
Medium:
Compressed air
Max. back pressure (nominal pressure): 6 bar
Operating temperature:
-10°C up to +90°C *
Mounting position:
any, connection axial
Materials:
- Housing
zinc-plated steel
DC03-A
- Perforated plates, connection pipe
zinc-plated steel
- Filter plates
polyester felt, resin bon-
ded, age resistant
- Cap
PVC, black, 70° Shore
Modell 391.2xx
Medium:
Compressed air
Max. back pressure (nominal pressure): 6 bar
Operating temperature:
-10°C up to +60°C *
Mounting position:
any, connection axial
Materials:
- Housing
zinc-plated steel
DC03-A
- Perforated plates, connection pipe
zinc-plated steel
- Filter plates
polyester felt, resin bon-
ded, age resistant
- Cap
PVC, black, 70° Shore
* Please consider ambient air quality at temperatures under +2 °C! To
ensure a save operation of valve an muffler, it is important that the air is
dry enough to prevent the muffler from icing.
!
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