Elmo Rietschle G-BH7 Operating instructions - Manual (Page 19)

Installation
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 WARNING
Danger due to vacuum and gauge pressure!
Danger due to escaping fluid!
During operation, connected pipes and vessels
are vacuumized or pressurized!
Use only mounting elements, connections, lines,
fittings and containers with sufficient freedom
from leaks and strength for the pressures which
occur.
Make sure that the mounting elements and
connections are mounted sufficiently firmly and
leak-free!
CAUTION
If the pumped gases are passed on the
discharge side in a closed pipe system, then it
must be ensured that the pipe system is
adapted to the maximum discharge pressure.
See Chapter 3.3: "Operating conditions",
Section "Pressures", Pg. 11). Connect a
pressure relief valve upstream if necessary.
NOTICE
Attach pipes/hoses free of mechanical tensions.
Support the weight of the pipes/hoses.
5.3.1 Inlet connection
The inlet connection with the related muffler
(Fig. 1, Pg. 2, Item 3) is marked with an arrow
pointing into the vacuum pump/compressor.
Connect the inlet pipe here. The pumped gases
are sucked in via this.
Procedure: see Chapter 5.3.3.
 WARNING
Danger from solid bodies and impurities in
the pump-motor unit!
If solid bodies penetrate into the pump-motor
unit, blades of the impellers can break and
broken pieces can be thrown out.
Install a filter in the inlet pipe.
Replace filter regularly!
5.3.2 Discharge
connection
The discharge connection with the related muffler
(Fig. 1, Pg. 2, Item 4) is marked with an arrow
pointing out of the vacuum pump/compressor.
Connect the discharge pipe here. The pumped
gases are discharged via this.
Procedure: see Chapter 5.3.3.
5.3.3 Procedure
when connecting
pipes/hoses
Attach the pipes/hoses to the unit as described in
the following.
The pipes/hoses are connected differently to inlet
and discharge connections depending on the
type of line (pipe or hose):
 Muffler (with inside threads):
The pipe is screwed directly into the muffler.
 Hose connection:
– Screw hose flange (available as an
accessory) onto the muffler.
– Push the hose onto the hose flange and
secure it with a hose clamp. See
Chapter 3.1, "Mechanical data",
Section "Tightening torques for screw
connections", Pg. 10 for information on this
topic.