Labconco Rapid Distillation Apparatus 65000 - Manual (Page 17)

ROUTINE MAINTENANCE
13
Stopcock
The Labconco Rapid Distillation Apparatus is equipped with (2) PTFE stopcocks. The
PTFE stopcocks do not require lubricants. The plug and glass barrel may be cleaned with Acetone
to wash away any solid particles that might accumulate during long service. If solid particle s
become lodged between the plug and glass barrel, or project from the glass surfaces, they can score
the PTFE plug around its bore and result in a “leaky” plug.
When alkalies or other liquids corrosive to glass are used in PTFE-glass stopcock valve
assemblies, rinse all valve components thoroughly with water after each use. Roughness of the
glass barrel due to liquid concentrate formed on evaporation may score the plug. Additional
information is provided with this unit and may be referred to for service.
Figure 4
Stopcock