BUCHI SpeedExtractor E-916 - Manual (Page 65)

7 Maintenance
65 SpeedExtractor E-916/E-914 Operation Manual, Version D
b
a
Replacing the lower cup seals
• To replace the lower cup seals, push in the heating
block until it is locked in the back position. Unscrew
the metal piece a manually and pull out the seal b.
NOTE
In contrast to the upper cup seal, no tool is required
for removal of the metal piece a.
• Replace the old seal with a new one (P/N 053670)
and proceed in reverse order to install the new seal.
Screw the metal piece a hand tight. Perform a
leak test to check the tightness of the system (see
section 6.2.5).
spring
spring
NOTE
The metal piece a has no sealing function what-
soever. Carefully screw it unto the stopper. Please
check the orientation of the cup seals. Make sure
that the spring always points to the extraction cell.
NOTE
Never remove the cup seals using your fingernails or any kind of tools, because that might damage
the seals or seal holder. With the help of plastic glove the seals can easily be turned and taken off.
7.2.3 Tube connections and needles
Visually examine the tube connections on a regular basis. All tubes which are accessible without open-
ing the housing can easily be exchanged by the operator. For all other lines please contact your local
BUCHI representative.
a b
c
Solvent reservoir connections
The FEP tubes a (OD 1/8”, ID 1/16”) are fixed with
green ferrules b and fittings c (1/4 UNF-28, D 1/8”).
To reduce any dead volume and potential sources of
contamination, make sure that the ferrule is always
flush with the end of the tube. The pointed end of the
ferrule is oriented to the fitting.