39
Rotavapor
R-220 EX
6 Maintenance
6.9 Vacuum Seal
The seal should be cleaned whenever necessary, but at least
once every six months.
During the intake phase, which lasts approx. 10 hours, the
seal will show signs of greater material loss due to wear. This
is normal for a PTFE seal.
Cleaning
Before the packet of seals can be removed, the distribution
head must be released and screwed off. The complete seal
packet can then be taken out and cleaned.
Wipe off the sealing lip using a soft, dry cloth. Clean the
running surface on the vapor duct well.
Regular cleaning of the seal will result in a longer service
life for it.
6.10 Testing for Leaks
After the rotary evaporator has been completely assembled
and before putting it into operation, i.e., while it is clean and
dry, check for tightness of the vacuum. To do this, evacuate
the unit to below 100 mbar and then close the vacuum line.
The rate of pressure rise must not exceed 3 to 5 mbar per
15 minutes.
A greater pressure rise indicates a leak in the vacuum seal.
In such a case, recheck all EasyClamp connections and all
valves.
6.11 Customer Service
No intervention on or in the unit is permissible except when
done by authorized Service personnel. These are individu-
als with a well-backed technical professional training and
knowl edge of the dangers that result from a failure to observe
the safety precautions required. BUCHI’s Customer Service
rep resentatives have available to them a Service Manual
specific to the unit in question. That manual is issued only
to authorized Service personnel.
The addresses of BUCHI’s official Customer Service rep re-
sen tatives are shown on the back cover of this Operation
Manual. Please turn to these representatives should you
have any malfunctions, technical questions, or problems in
using the unit.
BUCHI’s Customer Service Dept. will be ready and happy to
offer the following services:
• Spare parts service
• Repair service
• Maintenance service
• Technical consultation.
